Rainfall analysis and distribution of forest types in Thailand
1992
Chingchai Viriyabuncha
Analysis of rainfall in relation to forest types distribution was carried out by using climatic data from Meteorological Department, Royal Irrigation Department, Electricity Generating Authority of Thailand and Royal Forest Department. The climatic data were collected during 1957-1986 from 1,369 stations all over the country. The forest areas and vegetation maps were compiled from Remote Sensing and Mapping Sub-Division, Forest Management Division, Royal Forest Department. The amount of annual rainfall during the 3 lapses, 1987-1966, 1967-1976 and 1957-1986 were not fluctuating markedly, with the exception in some provincial areas in the Central in which the annual rainfall tended to decrease. The amount of annual rainfall and number of rainy days exhibit a fluctuating pattern during the cycle of 10-11 years in the North and the Northeast and of 11-12 years in the East and Central of Thailand. However, in the Southern part the pattern of annual rainfall was not much fluctuating. Mean maximum temperature, mean temperature and mean minimum temperature were rather constant in each area, while annual mean of relative humidity was fluctuating markedly towards the increase or decrease in some areas. The distribution of forest types in Thailand is not only governed by the amount of annual rainfall but also by various related factors such as altitude, edaphic, topography and biotic etc. Hence, all these factors should be taken into consideration in the analysis of distribution of forest formations of the country.
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This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
