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close this bookConservation and Development in Northern Thailand. Proceedings of a Programmatic Workshop on Agro-forestry and Highland-Lowland Interactive Systems, Held at Chiang Mai, Thailand, 13-17 November 1978 (UNU, 1980, 114 pages)
close this folderSubcommittee reports, plenary discussion, and recommendations
View the documentReport by the subcommittee on documentation, training, and personnel
View the documentReport by the subcommittee on mapping and cover-type data requirements
View the documentReport by the subcommittee on climate, soil. and soil erosion data requirements
View the documentReport by the subcommittee on socio-cultural, demographic, and economic aspects
View the documentPlenary session
View the documentRecommendations

Report by the subcommittee on mapping and cover-type data requirements

Cartography is a necessary part of the proposed Huai Thung Choa project, and maps should be made at two scales: the immediate field area at 1 :20,000/1 :25,000; and the wider area of the Mae Ping watershed north of Chiang Mai together with the Salween River watershed at the same latitude as far as the Burmese border at a scale of 1:100.000/1 :250,000.

Existing Data, and Data to Be Obtained

There are good topographic maps at 1 :500,000 and 1 :250,000 and air photographic coverage from 1954 and 1970 at 1 :50,000. More recent (1972) air photography at 1 :20,000 is available for some areas. principally the lowlands. Geological maps are available at scales of 1:1.000.000 and 1 :250,000, but will be of limited value for this project. Forest type maps are available at 1 :50,000 and 1:1,000,000. A landuse map at a scale of 1:1,000,000 from LANDSAT imagery is available from the Land Development Department. Professor Nualsiri Wongtangsawat has produced an excellent geomorphological map of the Chiang Mai area at a scale of 1 :250,000. It would be most useful if a comparable sheet, immediately to the north, could be compiled for the project. Additional maps are available as follows.

Landscape dynamics by Dr. Michel Bruneau transect Mae Taeng-Pai at 1:50,000. This includes a part of the Huai Thung Choa area.

General information ARSCT Northern Region Atlas (1 :1,000,000) .

Settlement map Tribal Research Centre (1 :500,000).

Environmental information trail study by Professor Phunphon for ARSCT (1 :50.000).

Larger scale maps, 1 :50,000, and the 1 :25,000 base from which they are derived, may be available from the military if security clearance can be obtained.

Cartographic Research Required for the Project

It is recommended that the following maps be compiled within three years at a scale of 1 :250,000:

A set of thematic maps including: hypsometry. hydrography (with watershed delineation). climatic maps with charts, geomorphology, soils. Iandscape dynamics, including vegetation and land-use changes since 1954. as well as settlements and population

It is further recommended that the following maps at 1 :20,000/1 :25,000 be prepared, also within three years after the initiation of the project:

Slopes, soils. geomorphology and erosion forms, vegetation and land-use types and their dynamics since 1954, settlements. population, and ethnic groups, Iand capability, and research on LANDSAT digital data processing using 1973-1978 imagery from the beginning and end of the dry season.

These recommendations imply a considerable amount of new field survey and cartography. The landscape dynamic maps should be done at the two scales in parallel with the soils and geomorphic maps during the first two years. The Chiang Mai University Geography Department has the capability of undertaking this work if adequate research funds can be acquired. Supervisors of the work should be Professors Nualsiri Wongtangsawat and Phunphon; with at least two students trained abroad in the fields of remote sensing and vegetation mapping.

The aim of the cartographic work would be to provide vital background date for all other aspects of the project and to provide a research tool in itself, particularly the landscape dynamic maps. Thus a link could be established between the natural and human sciences studies and human environmental impacts could be graphically demonstrated.