![]() | An Overview of Disaster Management (Department of Humanitarian Affairs/United Nations Disaster Relief Office - United Nations Development Programme , 1992, 136 p.) |
![]() | ![]() | PART ONE: HAZARDS AND DISASTERS |
LEARNING
OBJECTIVES
After reading the material and completing the exercises you should be able to:
define the key terms of disaster management
describe the causes of disaster vulnerability
reproduce the disaster management continuum diagram
identify the most important hazards and how they affect society
distinguish between natural and human made hazards
identify at least two ways that development can lead directly to a disaster
describe at least four ways that disasters disrupt development
Q. How do you define hazard and disaster? | |
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A.
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Before going any further we should establish a common understanding of the terms hazard and disaster.
Definition of hazard
A hazard is a rare or extreme event in the natural or human-made environment that adversely affects human life, property or activity to the extent of causing a disaster.
Definition of disaster
A disaster is a serious disruption of the functioning of a society, causing widespread human, material, or environmental losses which exceed the ability of affected society to copy using only its own resources. Disasters are often classified according to their speed of onset (sudden or slow), or according to their cause (natural or man-made).
Definition of natural phenomena
This part of the module will focus on the above two terms but we need to examine them in relation to another term: natural phenomena. Natural phenomena are extreme climatological, hydrological, or geological processes that do not pose any threat to persons or property. A massive earthquake in an unpopulated area, for example, is a natural phenomena, not a hazard. So is the annual flood along the Nile, an essential element to the well being of its neighboring inhabitants.
Definition of emergency
Another term closely related to disaster and used throughout this module is emergency. A disaster might be regarded as a particular type (or sub-set) of an emergency. Disaster suggests an intense time period and level of urgency. Whereas a disaster is bound by a specific period in which lives and essential property are immediately at risk, an emergency can encompass a more general period in which
there is a clear and marked deterioration in the coping abilities of a group or community, or
coping abilities are only sustained by unusual initiatives by the group or community or by external intervention.
This section will describe certain phenomena leading to disasters and emergencies: disaster trends, where they occur and who is most affected by them.
From the outset it is worth reminding ourselves that disasters and emergencies are all too often regarded as aberrant events, divorced from normal life. In reality, however, the opposite is true. Disasters and emergencies are fundamental reflections of normal life. They are consequences of the ways societies structure themselves, economically and socially; the ways that societies and states interact; and the ways that relationships between the decision makers are sustained. Hence a flood or an earthquake is not a disaster in and of itself.
The disaster stems from the fact that certain communities or groups are forced to settle in areas susceptible to the impact of a raging river or a volcanic eruption. It is essential to make a distinction between hazards and disasters, and to recognize that the effect of the former upon the latter is essentially a measure of the societys vulnerability.
The following diagram illustrates this combination of opposing forces. Vulnerability is seen as the progression of three stages:
1. Underlying causes: a deep-rooted set of factors within a society that together form and maintain vulnerability.2. Dynamic pressures: a translating process that channels the effects of a negative cause into unsafe conditions; this process may be due to a lack of basic services or provisionor it may result from a series of macro-forces
3. Unsafe conditions: the vulnerable context where people and property are exposed to the risk of disaster; the fragile physical environment is one element; other factors include an unstable economy and low income levels.
This material has been drawn from the first chapter of the forthcoming book: At Risk - Vulnerability and Disasters, by Piers Blaikie, Terry Cannon, Ian Davis and Ben Wisner (Harper Collins, London and New York).
The magnitude of each disaster, measured in deaths, damage, or costs for a given developing country increases with the increased marginalization of the population. This is caused by a high birthrate, problems of land tenure and economic opportunity, and the lack or misallocation of resources to meet the basic human needs of an expanding population. As the population increases, the best land in both rural and urban areas is taken up and those seeking land for farming or housing are forced to accept inadequate land. These offer less productivity and a smaller measure of physical or economic safety. The following section considers each of these issues.
Photo credit: UNHCR/M. Vanappelghem
The most important single influence on the impact of a disaster is poverty. All other factors could be lessened if the affected population were not also limited by poverty. Virtually all disaster studies show that the wealthiest of the population either survive the disaster unaffected or are able to recover quickly. Across the broad spectrum of disasters, poverty generally makes people vulnerable to the impact of hazards. Poverty explains why people in urban areas are forced to live on hills that are prone to landslides, or why people settle near volcanos or rivers that invariably flood their banks. Poverty explains why droughts claim poor peasant farmers as victims and rarely the wealthy, and why famines more often than not are the result of a lack of purchasing power to buy food rather than an absence of food. Increasingly, poverty also explains why many people are forced to move from their homes to other parts of their countries or even across borders to survive. Such crisis-induced migration poses considerable challenges both in terms of immediate assistance to the displaced and of longer-term development.
There is an obvious connection between the increase in losses from a disaster and the increase in population. If there are more people and structures where a disaster strikes, then it is likely there will be more of an impact. The growth of population has been so spectacular that it is inevitable that more people will be affected by disasters because more will be forced to live and work in unsafe areas. Increasing numbers of people will be competing for a limited amount of resources (such as, employment opportunities, and land) which can lead to conflict. This conflict may result in crisis-induced migration. Such growth occurs predominantly in developing countries, resulting in various contributors to disasters.
Source: Thomas Merrick, et. al., World Population in Transition, Population Bulletin, Vol. 42, No. 2 (1986).
Rapid population growth and migration are related to the major phenomenon of rapid urbanization. This process is also accelerated in developing countries. It is characterized by the rural poor or civilians in an area of conflict moving to metropolitan areas in search of economic opportunities and security. These massive numbers of urban poor increasingly find fewer options for availability of safe and desirable places to build their houses. Here again, competition for scarce resources, an inevitable consequence of rapid urbanization, can lead to human-made disasters.
Many landslides or flooding disasters are closely linked to rapid and unchecked urbanization which forces low-income families to settle on the slopes of steep hillsides or ravines, or along the banks of flood-prone rivers. Many earthquake victims in urban areas have been impoverished families whose sites have failed rather than their houses, usually through landslides onto the house or out from under it.
Many of the inevitable changes that occur in all societies lead to an increase in the societies vulnerability to disasters. Obviously, all societies are constantly changing and in a continual state of transition. These transitions are often extremely disruptive and uneven, leaving gaps in social coping mechanisms and technology. These transitions include nomadic populations that become sedentary, rural people who move to urban areas, and both rural and urban people who move from one economic level to another. More broadly, these examples are typical of a shift from non-industrialized to industrializing societies.
One example of the impact of these transitions is the introduction of new construction materials and building designs in a society that is accustomed to traditional materials and designs. This often results in new materials being used incorrectly. In disaster prone areas, inadequate new construction techniques may lead to houses that cannot withstand earthquakes or wind storms (see the following figure).
Compounding this problem is the new community where the disaster survivors find themselves may not have a social support system or network to assist in the relief and recovery from the disaster. The traditional coping mechanisms may not exist in the new setting and the population becomes increasingly dependent on outside interveners to help in this process.
Conflicting as well as transitional cultural practices can also lead to civil conflict, for example, as a result of communal violence triggered by religious differences.
Many disasters are either caused or exacerbated by environmental degradation. Deforestation leads to rapid rain run off, which contributes to flooding. The destruction of mangrove swamps decreases a coast lines ability to resist tropical winds and storm surges.
The creation of drought conditions - and the relative severity and length of time the drought lasts - is mainly a natural phenomena. Drought conditions may be exacerbated by: poor cropping patterns, overgrazing, the stripping of topsoil, poor conservation techniques, depletion of both the surface and subsurface water supply, and, to an extent, unchecked urbanization.
Disasters can also happen because people vulnerable to them simply didnt know how to get out of harms way or to take protective measures. This ignorance may not necessarily be a function of poverty, but a lack of awareness of what measures can be taken to build safe structures on safe locations. Perhaps some people did not know about safe evacuation routes and procedures. Other populations may not know where to turn for assistance in times of acute distress. Nevertheless, this point should not be taken as a justification for ignoring the coping mechanisms of the majority of people affected by disasters. In most disaster-prone societies, there is a wealth of understanding about disaster threats and responses. This understanding should be incorporated into any efforts to provide external assistance.
In this text war and civil strife are regarded as hazards, that is, extreme events that produce disasters. War and civil strife often result in displaced people, a target population of this training programme. The causal factors of war and civil strife include competition for scarce resources, religious or ethnic intolerance, and ideological differences. Many of these are also byproducts of the preceding six causal factors of disasters.
Q. Of the seven causal factors of disasters discussed above, how would you rank them for the region in which you live? | |
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A. List the most serious contributor
first. | |
6.____________________________________________________________ |
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Some terminology of disaster management has already been introduced in this module. A brief glossary follows to highlight some of these working definitions.
This glossary lists the disaster management terms as used in the Third Draft of A list of Disaster Management related terms with their definitions to be included in an internationally agreed multilingual glossary prepared by UNDRO, and in the UNDP/UNDRO Disaster Management Manual. However, consensus does not exist among all disaster management practitioners or academicians regarding these definitions. A standardized and universally accepted glossary would obviously be desirable, but is not likely to exist within the next few years. Consequently, the following definitions represent one effort toward developing a consensus. Users of the DMTP training materials are encouraged to adopt these working definitions for the sake of uniformity and to be tolerant of other groups definitions.
Q. Can you think of an example of how to use each of these terms? Write your example in the space below each definition.
Disaster management
Disaster management is the body of policy and administrative decisions and operational activities which pertain to the various stages of a disaster at all levels.
A.
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Human-made disasters
Human-made disasters are disasters or emergency situations where the principal, direct cause(s) are identifiable human actions, deliberate or otherwise. Apart from technological and ecological disasters, this mainly involves situations in which civilian populations suffer casualties, losses of property, basic services and means of livelihood as a result of war or civil strife, for example. Human-made disasters/emergencies can be of the rapid or slow onset types, and in the case of internal conflict, can lead to complex emergencies as well.
A.
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An even broader definition of human-made disaster acknowledges that all disasters are caused by humans because they have chosen, for whatever reason, to be where natural phenomena occurs that result in adverse impacts on people.
A.
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Risk
Risk is the expected losses (lives lost, persons injured, damage to property and disruption of economic activity) due to a particular hazard. Risk is the product of hazard and vulnerability.
A.
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Vulnerability
Vulnerability is the degree of loss (for example, from 0 to 100 percent) resulting from a potentially damaging phenomenon.
A.
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The following terms are key to understanding slow onset disasters and their impact on populations.
Population displacements
Population displacements are usually associated with crisis-induced mass migration in which large numbers of people are forced to leave their homes to seek alternative means of survival. Such mass movements normally result from the effects of conflict, severe food shortages or collapse of economic support systems.
A.
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Complex emergencies
Complex emergencies are a form of human-made emergency in which the cause of the emergency as well as the assistance to the afflicted are bound by intense levels of political considerations. This sort of emergency is normally associated with the problems of displaced people during times of civil conflict or with people in need caught in areas of conflict.
A.
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Disasters can be viewed as a series of phases on a time continuum. Identifying and understanding these phases helps to describe disaster related needs and to conceptualize appropriate disaster management activities.
The definitions below correspond to the time sequence following the occurrence of a rapid onset disaster. See Figure 2.1.
Relief phase
The relief phase is the period immediately following the occurrence of a sudden disaster (or the late discovery of a neglected/deteriorated slow-onset situation) when exceptional measures have to be taken to search and find the survivors as well as meet their basic needs for shelter, water, food and medical care.
A.
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Rehabilitation
Rehabilitation is the operations and decisions taken after a disaster with a view to restoring a stricken community to its former living conditions, while encouraging and facilitating the necessary adjustments to the changes caused by the disaster.
A.
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Reconstruction
Reconstruction is the actions taken to reestablish a community after a period of rehabilitation subsequent to a disaster. Actions would include construction of permanent housing, full restoration of all services, and complete resumption of the pre-disaster state.
A.
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Mitigation
Mitigation is the collective term used to encompass all actions taken prior to the occurrence of a disaster (pre-disaster measures) including preparedness and long-term risk reduction measures. (Mitigation has been used by some institutions or authors in a narrower sense, excluding preparedness.)
A.
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Preparedness
Preparedness consists of activities designed to minimize loss of life and damage, organize the temporary removal of people and property from a threatened location, and facilitate timely and effective rescue, relief and rehabilitation.
A.
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The sequence of a disaster continuum for slow onset disasters is similar in framework but has important distinctions. The following terms and definitions reflect those additions or modifications. See Figure 2.2.
Early warning
Early warning is the process of monitoring situations in communities or areas known to be vulnerable to slow onset hazards. For example, famine early warning may be reflected in such indicators as drought, livestock sales, or changes in economic conditions. The purposes of early warning are to enable remedial measures to be initiated and to provide more timely and effective relief including through disaster preparedness actions.
A.
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Emergency phase
The emergency phase is the period during which extraordinary measures have to be taken. Special emergency procedures and authorities may be applied to support human needs, sustain livelihoods, and protect property to avoid the onset of disaster. This phase can encompass pre-disaster, disaster alert, disaster relief and recovery periods. An emergency phase may be quite extensive, as in a slow onset disaster such as a famine. It can also be relatively short-lived, as after an earthquake.
A.
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Rehabilitation
Rehabilitation is the action taken after a slow onset disaster where attention must be given to the issues of resettlement or returnee programmes, particularly for people who have been displaced for reasons arising out of conflict or economic collapse.
A.
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Q. Test your recall of the two disaster continuum diagrams. Label each circles below with the phases of a rapid onset and slow onset disaster. |
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1 Sources for this chapter are Disasters and Development, a UNDP/UNDRO training module prepared by R.S. Stephenson and Disasters and Development: a study in institution-building prepared for UNDP by INTERTECT, January 1991.
This training module provides a new conceptualization of the relationship between disasters and development. This new conceptualization has been growing in the development community over the last few years and is a major philosophical underpinning of the United Nations Disaster Management Training Programme. Rarely a week goes by when a major disaster is not reported in the media - a disaster that results in death and destruction - a disaster that frequently wipes out years of development programming and sets the slow course of improvement in third world countries further behind, wasting precious resources.
For a long time the cause and effect relationship between disasters and social and economic development was ignored. Ministries of Planning and Finance and other development planners did not concern themselves with disasters. At best, development planners hoped that disasters would not occur and, if they did, were most effectively handled by relief from donor countries and relief organizations. Development programs were not assessed in the context of disasters, neither from the effect of the disaster on the development program nor from the point of whether the development programs increased either the likelihood of a disaster or increased the potential damaging effects of a disaster.
Disasters were seen in the context of emergency response - not as a part of long term development programming. When a disaster did occur, the response was directed to emergency needs and cleaning up. Communities under disaster distress were seen as unlikely places to institute development. The post-disaster environment was seen as too turbulent to promote institutional changes aimed at promoting long term development.
The growing body of knowledge on the relationships between disasters and development indicates four basic themes. The themes presented in the proceeding figure may be expanded as follows:
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1. Disasters set back development programming destroying years of development initiatives. - Infrastructure improvement e.g. transport and utility systems are destroyed by a flood. |
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2. Rebuilding after a disaster provides significant opportunities to initiate development programs. - A self-help housing program to rebuild housing destroyed by an earthquake teaches new skills, strengthens community pride and leadership and retains development dollars that otherwise would be exported to large construction companies. |
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3. Development programs can increase an areas susceptibility to disasters. - A major increase in livestock development leads to overgrazing, which contributes to desertification and increases vulnerability to famine. |
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4. Development programs can be designed to decrease the susceptibility to disasters and their negative consequences. - Housing projects constructed under building codes designed to withstand high winds result in less destruction during the next tropical storm. |
Decision-makers who ignore these relationships between disasters and development do a disservice to the people who place their trust in them. Increasingly, around the world, forward thinking Ministries of Planning and Finance with the support of United Nations and Non-Governmental Organization (NGO) officials are assessing development projects in the context of disaster mitigation and are designing disaster recovery programs with long term development needs in mind.
Disasters can seriously disrupt development initiatives in several ways, including:
· Loss of resources
· Interruption of programs
· Impact on investment climate
· Impact on the non-formal sector
· Political destabilization
Loss of resources
Development resources are lost when a disaster wipes out the products of investment - it shortens the life of development investments. The disasters affect development through:
· Impact on capital stock and inventory· Loss of production and provision of services due to disruption and increased cost of goods and services
· The secondary effects of the disaster include inflation, balance of payment problems, increase in fiscal expenditure, decreases in monetary reserves
· Other indirect losses, for example: the impact on a countrys debt position could be that as the debt service burden increases, the country has less resources available to invest in productive enterprises
· The outcome of these losses of resources include: loss of economic growth, delays to development programs, cancellation of programmes, and disincentives to new investment
· There may also be a shift in skilled human resources toward high visibility recovery activity - a diversion from long-term to short-term needs.
Interruption of programs
Disasters interrupt ongoing programs and divert resources from originally planned uses.
Impact on investment climate
Disasters, especially when they have occurred repeatedly within a short period of time, have a negative impact on the incentive for further investment. Investors need a climate of stability and certainty to be encouraged to risk their money. The disaster further clouds the investment picture when it has caused loss of employment, thereby depressing market demand, and resulting in a stagnation which limits overall growth.
Impact on non-formal sector
Disasters have special negative impacts on the non-formal sector where approximate costs of disasters are often underestimated. Disasters depress the non-formal economy through the direct costs of lost equipment and housing (which often also serves as business sites). The indirect costs of disasters include lost employment, and lost income. Sometimes the importation of relief items creates disincentives to producers.
Political destabilization
The stress to a country caused by a disaster often results in the destabilization of the government. This may occur for several reasons. For example, the government may have mismanaged the disaster relief and recovery, leading to discontent on the part of affected communities. Or the survivors may have had unmet expectations which, for whatever reason, translate into some form of protest. The government could also become the scapegoat for problems beyond its control, again leading to its possible downfall. In fact, it is very common for a government to collapse or be overthrown within two or three years of a major disaster.
Q. Recall the most recent disaster with which you are familiar. Based on that experience, respond to the following. |
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A. |
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1. |
Identify a facility critical to the local economy that was
knocked out of
service. |
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2. |
Name one development project that was
interrupted. | |
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3. |
Identify one case of an investment that was withdrawn or reduced
because of the
disaster. | |
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4. |
Identify one case of non-formal sector employment that was lost
because disaster relief displaced the need for
it. | |
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5. |
Describe an example of how the government may have been
destabilized by the
disaster. |
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The side effects of well-meaning development efforts sometimes have disastrous consequences. Development projects implemented without taking into account existing environmental hazards may increase vulnerability to natural disasters. For example, projects designed to increase employment opportunities, and thus income, usually attract additional population growth. Low-income people may then have to seek housing in areas previously avoided, on hillsides or in floodplains. The costs of relief assistance after a landslide or flood can easily outweigh the benefits to the economy of more jobs. Similarly, development projects may lead to negative political consequences that increase the vulnerability to civil conflict.
Some types of development projects commence without fully assessing their impact on the environment. This can occur even in programmes resulting from a disaster, such as reconstruction projects that increase demand for wood to fortify houses. The resulting deforestation can then bring increased vulnerability to mudslides and possibly long-term environmental changes.
Development projects may even consciously force a choice between reducing disaster vulnerability and economic vulnerability. A projects design may require a trade-off between the two and force a decision between the lesser of two evils.
Q. Can you describe how development can contribute to vulnerability based on the following examples of negative consequences? | |
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A. |
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Watershed erosion
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Marine and coastal zone development
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See next table for examples of answers to this question.
Table 3.1 Examples of development leading to disasters or increased vulnerability
From Disasters and Development: A Study in Institution Building, Intertect, January, 1991.
Sector |
Development activity |
Results |
Industry |
Construction of chemical plant generating employment |
Deaths due to inadvertent release of chemicals, increased health problems, hazardous or toxic waste accidents |
Agriculture, forestry and fisheries |
Introduction of new species to control pests |
Uncontrolled expansion of new species into environment, bringing crop failure |
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Irrigation schemes |
Flooding where canals counter natural water flow |
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Increase in pesticide or fertiliser use to augment crop yields |
Contamination of potable water supplies |
Natural resources |
Construction of hydroelectric dam |
Displacement, salinization |
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Drilling of water wells in marginal areas |
Desertification due to population clustering around wells |
Transportation, communications Education |
Road building in rain forests |
Landslides, deforestation |
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School construction on earthquake fault line |
Deaths/injuries due to structural failure |
Development issues, policy and planning |
Centralisation of planning process |
Famine due to lack of organisation of local governments |
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Concentration of tourist facilities on vulnerable coastlines, unstable hills |
Exposure of large populations to risk of death/injury/loss in storm surge, high wind storms, tsunami, landslides |
Despite an increasing disaster awareness in the international community, and the recognition of the importance of developing coherent plans for relief activities, it often takes the actual or imminent occurrence of a large-scale destructive event to stimulate individual governments to think about a developmental approach. Thus, a disaster can serve as a catalyst for introducing mitigation activities.
Few development workers realize the opportunities that disasters can provide in the development field. Disasters often create a political and economic atmosphere wherein extensive changes can be made more rapidly than under normal circumstances. For example, in the aftermath of a disaster, there may be major opportunities to execute land reform programmes, to improve the overall housing stock, to create new jobs and job skills, and to expand and modernize the economic base of the community - opportunities that would not otherwise be possible. The collective will to take action is an advantage that should not be wasted.
Disasters can also highlight high-risk areas where action must be taken before another disaster strikes. The realization of vulnerability can motivate policy-makers and the public to participate in mitigation activities. Disasters may also serve to highlight the fact that the country is seriously under-developed. They can thus bring in funding and the attention of donor communities to apply to long-term development needs. (Henderson, 1990)
In earlier chapters, the discussion about disasters and emergencies resulting from natural and human-made hazards has been developed in general terms. However, each hazard has its own characteristics. To understand the significance and implications of a particular type of disaster we must have a basic understanding about the nature, causes and effects of each hazard type.
The list of hazard types is very long. Many occur infrequently or impact a very small population. Other hazards, such as severe snowstorms, often occur in areas that are prepared to deal with them and seldom become disasters. However, from the perspective of a disaster victim it is not particularly useful to distinguish between minor and major disasters. Some disasters are now of limited interest to the international community. These include avalanches, fog, frost, hail, lightning, snowstorms, and tornadoes. The international interest is less for these hazards because their impacts affect relatively few people and the countries in which they normally occur have sufficient resources and systems in place to respond without external assistance.
There are several hazard types for which there is widespread concern. They can be categorized as follows:
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Sudden onset hazards - (geological and climatic hazards) earthquakes, tsunamis, floods, tropical storms, volcanic eruptions, landslides |
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Slow onset hazards - (environmental hazards) drought, famine, environmental degradation, desertification, deforestation, pest infestation |
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Industrial/technological - system failures/accidents, spillages, explosions, fires |
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Wars and civil strife - armed agression, insurgency, terrorism, and other actions leading to displaced persons and refugees |
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Epidemics - water and/or food-borne diseases, person-to-person diseases (contact and respiratory spread), vector-borne diseases and complications from wounds |
These hazard types are highlighted in this training material. The international community has an interest in them because they frequently affect large populations and the need for outside assistance is evident. Many disasters are themselves international events and have an impact on entire regions.
A brief description of each hazard type is presented below. It will be your responsibility to determine which hazards are of concern to your country and then to read the material about them.
Q. Which hazards are of concern to your country? | |
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A. List the most important hazards in order of
their severity of impact. |
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2.
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Now learn more about each of these hazards in the material that follows.
Geological Hazards |
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Earthquakes |
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Tsunamis | |
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Volcanic eruptions |
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Landslides | |
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Climatic Hazards |
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Tropical cyclones |
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Floods | | | | |
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Drought | |
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Environmental Hazards |
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Environmental pollution | | | | |
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Deforestation |
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Desertification |
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Pest Infestation |
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Epidemics | | | | | |
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Industrial Accidents |
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1 The following material on hazards and population displacements is drawn from the UNDP/UNDRO Disaster Management Manual.
This section provides an indication of the general characteristics of each of the hazard types listed and the kinds of counter-disaster measures which may be required. You should note that disasters have collateral or indirect effects that may endure even after a particular type of disaster has been directly addressed. The problem of displaced people after a sudden onset disaster, such as a cyclone, may continue well after immediate relief, recovery and even rehabilitation programmes have been implemented. Such collateral impact can turn a seemingly rapid onset disaster into a continuing emergency situation.
A further issue that must be borne in mind concerns the consequence of a sudden onset disaster when relief assistance is stymied because civil conflict makes access impossible. In other words, the perverse permutations are many. Nevertheless, the basic characteristics of certain types of disasters and emergencies and appropriate response measures can be structured as follows:
Causal phenomena
General characteristics
Predictability
Factors contributing to vulnerability
Typical effects
Possible risk reduction measures
Specific preparedness measures
Typical post-disaster needs
Different types of disasters have characteristic effects while retaining unique aspects. Risk reduction and preparedness measures, and emergency and post-disaster response can all be facilitated by some rules of thumb - as outlined in this section - but must also be tailored to the specificity of local conditions.
Remember:
(a) where different types of disaster occur in combination - e.g. floods accompanying tropical storms - the combined effects must be considered; and where one disaster leads to another (for example a famine leading to civil strife) the compound effects must be anticipated(b) the severity of the actual impact on the society depends on human and organizational factors as well as natural and topographical ones.
Legend
Volcanic eruptions
Shorelines exposed to tsunami waves
Seismic belts
Land areas affected by tropical cyclones
Desertification likely or active
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Causal phenomena |
Slippage of crustal rock along a fault or area of strain and rebound to new alignment. |
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General characteristics and effects |
Shaking of earth caused by waves on and below the earths surface causing: Surface faulting |
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Predictability |
Probability of occurrence can be determined but not exact timing. Forecasting is based on monitoring of seismic activity, historical incidence, and observations. |
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Factors contributing to vulnerability |
Location of settlements in seismic areas. |
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Typical adverse effects |
Physical damage - Damage or loss of structures or
infrastructure. Fires, dam failures, landslides, flooding may
occur. |
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Possible risk reduction measures |
Hazard mapping |
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Specific preparedness measures |
Earthquake warning and preparedness programs |
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Typical post-disaster needs |
Search and rescue |
Impact assessment tools |
Earthquake scales (Modified Mercalli, MSK), earthquake damage and usability forms. |
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Causal phenomena |
Fault movement on sea floor, accompanied by an earthquake. |
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General characteristics |
Tsunami waves are barely perceptible in deep water and may
measure 160 km between wave crests |
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Predictability |
Tsunami Warning System in Pacific monitors seismic activity and declares watches and warnings. Waves generated by local earthquakes may strike nearby shores within minutes and warnings to public may not be possible. |
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Factors contributing to vulnerability |
Location of settlements in low lying coastal regions |
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Typical adverse effects |
Physical damage - The force of water can raze everything
in its path but the majority of damage to structure and infrastructure results
from flooding. Withdrawal of the wave from shore scours out sediment and can
collapse ports and buildings and batter boats. |
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Possible risk reduction measures |
Protection of buildings along coast, houses on
stilts |
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Specific preparedness measures |
Hazard mapping, planning evacuation routes |
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Typical post-disaster needs |
Warning and evacuation; search and rescue; medical assistance; conduct disaster assessment, provide food, water and shelter |
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Impact assessment tools |
Aerial surveys of coastal areas, damage surveys, evaluation of warning systems and evacuation plans. |
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Causal phenomena |
Magma pushed upward through volcanic vent by pressure and effervescence of dissolved gases. |
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General characteristics |
Types of volcanoes are cindercones, shield volcanoes, composite
volcanoes and lava domes. |
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Predictability |
Study of the geological history of volcanoes mainly located in a clearly defined volcanic belt, along with seismic activity and other observations, may indicate an impending volcano. No reliable indicator has been discovered and precursory signs do not always occur. |
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Factors contributing to vulnerability |
Settlements on the flanks of volcanoes |
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Typical adverse effects |
Casualties and health - Death from pyroclastic flows, mud
flows and possibly lava flows and toxic gases. Injuries from falling rock, bums;
respiratory difficulties from gas and ash. |
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Possible risk reduction measures |
Land use planning for settlements around volcanoes |
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Specific preparedness measures |
National volcanic emergency plans |
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Typical post-disaster needs |
Warning and evacuation; medical assistance, search and rescue; provide food, water and shelter; relocate victims; provide financial assistance |
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Impact assessment tools |
Aerial and ground surveys to assess damage; evaluation of evacuation plan and emergency response |
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Causal phenomena |
Downslope transport of soil and rock resulting from naturally occurring vibrations, changes in direct water content, removal of lateral support, loading with weight, and weathering, or human manipulation of water courses and slope composition. |
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General characteristics |
Landslides vary in types of movement (falls, slides, topples, lateral spread, flows), and may be secondary effects of heavy storms, earthquakes, and volcanic eruptions. Landslides are more widespread than any other geological event. |
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Predictability |
Frequency of occurrence, extent and consequences of landslides may be estimated and areas of high risk determined by use of information on area geology, geomorphology, hydrology and climatology and vegetation. |
| |
Factors contributing to vulnerability |
Settlements built on steep slopes, softer soils, cliff
tops |
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Typical adverse effects |
Physical damage - Anything on top of or in path of
landslide will suffer damage. Rubble may block roads, lines of communication or
waterways. Indirect effects may include loss of productivity of agricultural or
forest lands, flooding, reduced property values. |
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Possible risk reduction measures |
Hazard mapping |
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Specific preparedness measures |
Community education |
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Typical post-disaster needs |
Search and rescue (use of earth removal equipment); medical assistance; emergency shelter for homeless |
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Impact assessment tools |
Damage assessment forms |
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Causal phenomena |
Mixture of heat and moisture forms a low pressure center over
oceans in tropical latitudes where water temperatures are over 26 degrees
C. |
| |
General characteristics |
When the cyclone strikes land, high winds, exceptional rainfall and storm surges cause damage with secondary flooding and landslides. |
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Predictability |
Tropical cyclones can be tracked from their development but accurate landfall forecasts are usually possible only a few hours before as unpredictable changes in course can occur. |
| |
Factors contributing to vulnerability |
Settlements located in low lying coastal areas (direct
impact) |
| |
Typical adverse effects |
Physical damage - Structures lost and damaged by wind
force, flooding, storm surge and landslides. |
|
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Possible risk reduction measures |
Risk assessment and hazard mapping |
| |
Specific preparedness measures |
Public warning systems |
| |
Typical post-disaster needs |
Evacuation and emergency shelter; search and rescue; medical assistance; water purification; reestablish logistical and communication networks; disaster assessment; provision of seeds for planting. |
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Impact assessment tools |
Damage assessment forms, aerial surveys |
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Causal phenomena |
Naturally occurring flash, river and coastal flooding from
intense rainfall or innundation associated with seasonal weather
patterns |
|
|
General characteristics |
Flash floods - Accelerated runoff, dam failure, breakup
of ice jam |
| |
Predictability |
Flood forecasting depends on seasonal patterns, capacity of drainage basin, flood plain mapping, surveys by air and land. Warning possible well in advance for seasonal floods, but only minutes before in case of storm surge, flash flood, or tsunami. |
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Factors contributing to vulnerability |
Location of settlements on floodplains |
| |
Typical adverse effects |
Physical damage - Structures damaged by washing away,
becoming inundated, collapsing, impact of floating debris. Landslides from
saturated soils. Damage greater in valleys than open areas. |
| |
Possible risk reduction measures |
Flood control (channels, dikes, dams, flood-proofing, erosion control) |
| |
Specific preparedness measures |
Flood detection and warning systems |
| |
Typical post-disaster needs |
Search and rescue; medical assistance; disaster assessment; short term food and water supplies; water purification; epidemiological surveillance; temporary shelter |
|
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Impact assessment tools |
Damage survey forms; aerial surveys |
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Causal phenomena |
Immediate cause - Rainfall deficit |
| |
General characteristics |
The reduction of water or moisture availability is temporary and
significant in relation to the norm. |
| |
Predictability |
Periods of unusual dryness are normal in all weather systems. Rainfall and hydrology data must be carefully analyzed with influencing factors in predicting drought, however, advance warning is usually possible. |
| |
Factors contributing to vulnerability |
Location in an arid area where dry conditions are increased by
drought |
| |
Typical adverse effects |
Reduced income for farmers; reduction of spending from agricultural sector; increase in price of staple foods, increased inflation rates, deterioration of nutritional status, famine, illness, death, reduction of drinking water sources, migration, breakup of communities, loss of livestock. |
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Possible risk reduction measures |
Drought and famine early warning systems |
| |
Specific preparedness measures |
Development of inter-institutional response plan |
| |
Typical post-disaster needs |
Measures to maintain food security: price stabilization, food subsidies, employment creation programs, general food distribution, supplementary feeding programs, special programs for livestock and pastoralists, complementary water and health programs; rehabilitation |
| |
Impact assessment tools |
Nutritional surveys, socioeconomic surveys, monitoring of rainfall and hydrological data, satellite imagery. |
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Causal phenomena |
Air pollution - pollutants such as sulphur dioxide,
nitrogen oxides, particulates, carbon monoxide, and lead from industry and
transport. |
| |
Predictability |
Pollution is related to per capita consumption so, as countries develop, pollution will also tend to increase. Deforestation is increasing in some countries. |
| |
Factors contributing to vulnerability |
High levels of industrialization and per capita
consumption |
|
|
Typical adverse effects |
Air pollution - Damages agricultural crops, forests,
aquatic systems, structural materials and human health. |
|
|
Possible risk reduction measures |
Set ambient air quality standards |
| |
Specific preparedness measures |
Establish a national environmental safety and protection
plan |
| |
Impact assessment tools |
Aerial, remote sensing and ground surveys |
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Causal phenomena |
The spread of farming and grazing |
|
|
General characteristics |
Contributes to other hazards by |
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Predictability |
An increase in global focus on the hazard is expanding data base leading to an increased awareness of the problem and to identifying where the problem exists. Overall, the global trend is decreasing as conservation measures are enacted but destruction of forests is rising at alarming rates in some countries. |
| |
Factors contributing to vulnerability |
Underdevelopment |
| |
Typical adverse effects |
Deforestation results in loss of free products from the forest such as fruits and medicines, and decline in traditional cultures. It stresses economies which import forest products and are dependent on wood products. It contributes to other hazards, such as: Flooding - Deforestation of watersheds can increase
severity of flooding, reduce streamflows, dry up springs in dry seasons and
increase sediment entering waterways. |
| |
Possible risk reduction measures |
Protection of forests through management, legislation,
conservancies |
|
|
Specific preparedness measures |
Education of the communities |
| |
Impact assessment tools |
Forest mapping by use of aerial or remote sensing or ground surveys. Monitoring of reforestation programs. |
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| |
Causal phenomena |
Basic conducive climatic conditions such as low or uncertain
rainfall and higher temperatures as found in dryland areas. |
|
|
General characteristics |
Soil degradation by water erosion, wind erosion, soil
compaction and waterlogging (salinization and alkalinization) |
| |
Predictability |
Global surveillance of drylands can be achieved through remote sensing and aerial surveys. As land use increases without measures to conserve soil and vegetation, desertification will likely increase. One estimate claims 202,000 square km are desertified each year. |
| |
Factors contributing to vulnerability |
Low rainfall and high temperatures |
| |
Typical adverse effects |
Desertification contributes to other hazards by reducing the productivity of the land. These include drought and famine. Reduced productivity has socioeconomic impacts and may reduce standards of living. |
| |
Possible risk reduction measures |
Establish community programs to meet needs and improve practices
and institutions. |
| |
Specific preparedness measures |
Promote projects to improve agricultural and livestock
production |
| |
Impact assessment tools |
Socioeconomic surveys are needed to ascertain needs of people and for agricultural development. Aerial and remote sensing surveys will help determine the rate and scope of desertification. |
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Causal phenomena |
Increase in pest numbers due to one or a combination of ecological factors including temperature, monoculture of crops, introduction of plants to new locations, introduction of pest species, overcoming genetic resistance in host, overcoming pesticide effects, conducive weather patterns, migration. |
| |
General characteristics |
Plants can be damaged in various ways such as consumption of parts, tunnelling in stems, attack of root systems, injection of toxins. |
| |
Predictability |
Pest forecasting determines whether application of a pesticide will be cost effective, by examining the stages of development of the crop and the pest and by determining the economic threshold. |
| |
Factors contributing to vulnerability |
Large numbers and varieties of pests |
| |
Typical adverse effects |
Crop losses could lead to food shortages, even famine, and stress economic systems. |
| |
Possible risk reduction measures |
Integrated pest management employing appropriate methods of physical control, cultural control, crop plant resistance, biological control, legislation, chemical control and possibly eradication. |
| |
Specific preparedness measures |
Establishing a national plan for pest control |
| |
Typical post-disaster needs |
National or international control efforts |
Impact assessment tools |
Assessment of incidence and severity of infestation |
Definition: Exposure to a toxin resulting in pronounced rise in number of cases of parasitic or infectious origin.
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| |
Causal phenomena |
Unsanitary conditions, crowding, poverty |
|
|
General characteristics |
Risk of introduction or spread of the disease |
| |
Predictability |
Epidemics may increase due to rise in travel or migration and long-term dormant symptoms of sexually transmitted diseases. Reports of epidemics may increase due to better medical coverage. Prediction is assisted by epidemiological studies but may be constrained in newly formed settlements or emergency camps. |
| |
Factors contributing to vulnerability |
Poverty |
| |
Typical adverse effects |
Illness and death |
| |
Possible risk reduction measures |
Structuring an emergency health service |
| |
Specific preparedness measures |
Intervention measures - Verify and confirm diagnosis;
identify cases; find source of epidemic; treat cases and control spread; write
report. |
| |
Typical post-disaster needs |
Emergency medical assistance; international aid, if outbreak uncontained |
| |
Impact assessment tools |
Epidemiological surveys; evaluation of health care systems and emergency response |
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Causal phenomena |
Disaster/explosion in a plant or storage facilities handling
toxic substances |
| |
Predictability |
Incidences of chemical and industrial accidents are expected to increase as industrialization increases in developing countries. |
| |
Factors contributing to vulnerability |
Those persons, structures, livestock, crops, and environment
closest to the scene of an accident are most vulnerable, however, large scale
releases of airborne pollutants may spread for hundreds of kilometers. |
|
|
Typical adverse effects |
Physical damage - Damage or destruction may occur to
structures and infrastructure. Transportation accidents damage vehicles and
other objects on impact. Industrial fires may reach high temperatures and affect
large areas. |
|
|
Possible risk reduction measures |
Development of a plan, such as the APELL (Awareness and Preparedness for Emergencies at the Local Level) process, to assist decision makers and technical personnel to improve community awareness of hazardous installations and aid them in preparing disaster response plans. |
| |
Specific preparedness measures |
Hazard mapping |
| |
Typical post-disaster needs |
Evacuation from area; search and rescue; alternative sources of water; cleanup; monitor environmental effects. |
| |
Impact assessment tools |
APELL process forms for emergency response plan evaluation, CHEMTREC (Chemical Transportation Emergency Center) information systems. |
1 The material from this chapter is drawn from the DMTP special topic module Displaced Persons in Civil Conflict by Frederick Cuny; General Assembly Resolution 46/182: The Executive Summary of the 1992 Consolidated Appeal for the Horn of Africa: and the Themes of Emergencies stated in the First SEPHA Situation Report.
Increasingly throughout many parts of the world one type of hazard can trigger a disaster which in turn triggers another hazard and subsequent disaster. For example, a drought may lead to a famine which in turn leads to a civil conflict that results in the mass displacement of people. A flood may force people to seek refuge across an international border where conflicts ensue between refugees and local communities.
Such compound hazards and disasters need not happen sequentially; they can also occur simultaneously. Thus, people caught between contending forces in a civil war find that in the midst of a major drought they have no means either to grow food or to receive outside assistance.
In a growing number of countries, complex disasters are also becoming more evident. Essentially a complex disaster is a form of human-made emergency in which the cause of the emergency as well as the assistance to the afflicted are bound by intense levels of political considerations. The single most prevalent political condition of a complex emergency is civil conflict, resulting in a collapse of political authority in all or part of a country. In such cases, at least one of three situations arise:
1. The governments ability to assist the disaster-afflicted becomes severely constrained.2. The government becomes extremely suspicious of or uninterested in afflicted people who have fled from non-government to government held areas.
3. The government or opposition groups actually create or compound a disaster through actions that generate refugees and the mass displacement of people.
In fact, many affected people live in areas outside of government control. They are often the persons who are most in need and they are often the most difficult to reach with aid.
The disaster becomes complex because either the collapse or diffusion of political control makes assistance highly problematic. Solutions ultimately depend upon agreements with all parties involved in the conflict to permit assistance to be provided to recognize civilian noncombatants. These solutions may be agreements that are seen essentially as compromising fundamental aspects of sovereignty for what have been labelled as new mechanisms of humanitarian assistance (for example, corridors of tranquility).
An acute example of a situation illustrating the characteristics of both compound and complex emergencies is the Horn of Africa. For the past several years the situation in the Horn of Africa has been characterized by internal conflicts in Ethiopia, Sudan, and Somalia. These conflicts have been exacerbated by recurrent droughts and have resulted in famines on a massive scale and the flight of large numbers of people across national borders. After years of drought in some parts of the region, by 1991 food shortages were widespread. It became apparent that the crisis in the region was less the result of inadequate rainfall than that of a human-made emergency.
During the last half of 1991, the situation in many parts of the Horn remained highly volatile and fragile, largely due to conflict and a break down of law and order. This resulted in further population displacement and in intense misery for millions of people.
One of the most serious consequences of compound and complex emergencies is the creation of populations of displaced persons. The example of the Horn of Africa refers to many of the displaced populations but there are millions more in other parts of the world.
The term displaced person applies in several contexts. These include people who are:
forced to leave their homes as a result of drought, famine, or other disaster, usually in search of food
non-combatant individuals and families forced to leave their homes because of the direct or indirect consequences of conflict but who remain inside their country
forcibly resettled by their government if the resettlement is ethnically, tribally or racially motivated
expelled from a country, especially as an ethnic or national group, forced out for economic or political reasons.
Reasons for concern
The international humanitarian relief system is just now beginning to meet the challenge of working with the displaced. There are three principle reasons for concern by relief agencies. One is that displaced persons are often ineligible to receive relief and assistance available to refugees (individuals who have crossed an international border seeking protection). A second reason is that the displaced are often insecure about relying on their own government for protection. A third reason is the obstacle of national sovereignty that limits outside agencies to assist this population.
Consequences and effects
The variety of possible situations generating displaced persons makes generalizations difficult, but the following may be experienced in varying degrees.
loss of means of livelihood
communities becoming separated from any services previously provided
loss of normal sources of food
lack of shelter and household necessities
lack of fuel for cooking
lack of potable water
communicable diseases and over-crowding
additional burdens particularly for women heads of households
possibly large numbers of unaccompanied children
loss of land tenure
possible communication and logistics problems
insecurity due to tensions and military activities
Not to be forgotten is the population that may remain at home and, even though they are not trapped in combat areas, they nonetheless are in places that are hard to reach because of political, logistical and/or security obstacles. They may suffer many of the above problems and be isolated from international humanitarian relief.
In light of the issues created by complex emergencies and the special needs of displaced populations, the United Nations has determined to strengthen and make more effective the collective efforts of the international community, in particular the UN system, in providing humanitarian assistance. This determination is reflected in the implementation of General Assembly resolution 46/182, passed in December of 1991.
This resolution affirms that humanitarian assistance must be provided in accordance with the principles of humanity, neutrality and impartiality. Accordingly the UN has a central and unique role to play in providing leadership and coordinating the efforts of the international community to support the affected countries.
The implementation of resolution 46/182 includes the creation of a contingency funding arrangement, that is, a central emergency revolving fund of US $50 million as a cash-flow mechanism to ensure the rapid and coordinated response of the organizations of the system. The UN will also establish a central register of specialized personnel and teams of technical specialists, supplies and other resources that can be called upon at short notice by the UN.
The leadership of this UN initiative will be provided by a high level official, the emergency relief coordinator, designated by the Secretary-General, to work with the entities of the UN system dealing with humanitarian assistance. This position combines the functions previously carried out in the coordination of UN response by representatives of the Secretary-General for major and complex emergencies, as well as by the United Nations Disaster Relief Coordinator.
This emergency relief coordinator, among other duties, is charged with facilitating the access by the operational organizations to emergency areas for the rapid provision of emergency assistance. In cases of complex emergencies this may require negotiation with all parties concerned to obtain their consent and, where needed, the establishment of temporary relief corridors, days and zones of tranquility and other forms.
There are many operational considerations in complex emergencies. One of the most crucial is that of the safety of relief teams in conflict zones. As coordinators of assistance for the displaced, the UN staff bears a special responsibility for ensuring that all personnel operating in or adjacent to conflict zones work in conditions of minimum risk and maximum security. Guidelines and procedures for personnel should be established in conjunction with the host government and, where possible, with insurgent groups. The UN is often charged with the responsibility of notifying relief workers and other organizations about the risks they may face from military operations in or near their relief activities. In this regard, the UN is often able to obtain clearances for special flights into contested areas on airplanes bearing United Nations markings, to arrange for safe transport through the front lines in specially-marked UN vehicles, and to establish special relief corridors whereby food and relief supplies can be delivered under flags of truce or through designated corridors, without undue restraint. It is important for the UN to carefully assess the risks before encouraging relief organizations to commit personnel and resources to operations in non-secure areas. A UN assurance that an area or means of transport is safe carries much weight - and responsibility.
Two of the most important aspects of working in remote and insecure areas are communications and stand-by evacuation support. To the greatest extent possible, UN coordinators should ensure that relief personnel have immediate and 24-hour access to telecommunications facilities and that suitable means are immediately available to evacuate personnel in case of an emergency. This may entail the assignment of light aircraft to be available on short notice to evacuate staff.