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close this book A training manual in conducting a workshop in the design, construction, operation, maintenance and repair of hydrams
close this folder Session 18: Hydram system site selection (2-4 hours)
View the document Handout 18A: Hydram system site selection
View the document Handout 18B: Diagram system for site selection

Session 18: Hydram system site selection (2-4 hours)

Time: 2-4 Hours

Objective: At the end of this session trainees will have selected a site for a hydram system from a range of possibilities, based on the technical, social and economic factors involved in the decision.

Overview: This session pulls together several issues that have been identified over the course of the workshop: technical feasibility, water need, access, skills, cost, community responsibility, maintenance and repair.

There are two possible activities described here:

1) a hypothetical exercise, with a hillside full of springs as possibilities

2) a field activity in a pre-selected location which presents several options for siting the system.

Note: Activity 2 is optimal and requires site identification by the trainer, concurrence for using the area (from local residents, officials, etc.). It takes much more time and makes a richer activity.


• For hypothetical activity, Handout 18A

• For actual field activity: site levels, tapes, weirs or estimated flow rates for source



1. State objectives of session and overview of activities.


2. Ask what are the major components of a

Especially if field activity

hydram system that needs siting, and

is used. Note any concerns

what are the major factors that

raised during this discussion.

influence the selection of a site.


3. Ask what information should be known

15 min.

about the project before site

Head needed for system, flood

selection can be made. List on flip

boundaries of stream, ownership


of land, cost of pipe of different


materials and in different sizes.

4. Ask what factors and components should be looked at, in what order.

1. hydram & head should be first then flood consideration

2. Take off point and distance D1 to hydram; flood considerations

3. Social factors for hydram and take off system 4. Storage facility and distance

5. above with social factors

6. Cost of above system

7. Distance, d3 and costs

8. Maintenance responsibilities, access.

5. Present actual or simulated situation and instruct participants that they will have to select a site.

30 min.



· Divide into groups of 4-5 Ask groups to spend 30 minutes organizing their tasks, responsibilities for gathering data at the site, and decision making process.


· go to site, gather data, make decision and prepare presentation/recommendation including rationale, need, cost.

1½ - 2 hours. Trainers should monitor rime.

· Each group presents, and large group critiques based on factors listed above.




· Individually, using handout 18A, and given spring flow rates, distances, select site for locating hydram, to deliver 1500 gpd. Solve for single ram first then consider series installation.

In this situation. its difficult to consider all social factors 30 min.

· Develop approximate costs.

20 min.

· Ask for responses; differences. Ask 1-2 participants with different answers to share rationale

20 min.

6. Ask participants which issues are of major concern at their sites.