Botbat khong suan yang phara to kan khuapkhum kan lai khong namtha nai Phak Tai khong Prathet Thai.
1992
Wiroon Rerkthanakajon
Based on percentage of para rubber cover, the investigation has been divided into 4 groups; they are less 25 %, 25-33 %, 33-50 % and more than 50 %. The increasing of para rubber cover caused the decreases of peak flow, the percentage of baseflow to rain-water and baseflow recession coefficient, while the direct runoff and its coefficients had uncertain direction. Furthermore, the potential of streamflow as related to para rubber cover showed unreliability but found runoff efficiency of natural forest nearly the same as protected forest. The relationships between streamflow and direct-flow recession coefficients to percentage of para rubber cover, rainfall, relief ratio and size of watershed. It indicated the positive relation between streamflow coefficient to relief ratio and to watershed area, while direct-flow coefficient found positive relation to para rubber area, rainfall, relief ratio and size of watershed. However, all variables had very little influence.
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