Water balance after 10 years watershed rehabilitation at Sakaerat Environmental Research Station, King Amphoe Wang Nam Khiew, Changwat Nakhon Ratchasima
1994
Somkid Chamroonrat
This research was carried out during May 1992 through April 1993 on four subwatershed named Huay Wanasart (natural dry evergreen forest), Huay, Namkam (almost forest plantation with some natural dry evergreen forest), Huay Kokped (natural dry dipterocarp forest) and Huay Tayoo (natural succession with some forest plantation). The results show that amount of annual rainfall after rehabilitation on Huay Wanasart, Huay Namkam, Huay Kokped and Huay Tayoo were about 1,302.6, 1,344.6, 1,263.9 and 1,344.6 mm respectively, annual streamflow were about 23.1, 108.8, 0.7, and 279.8 mm (1.77, 8.09, 0.06 and 20.81 percent of rainfall) respectively, annual evapotranspiration were about 768.9, 768.9, 907.5 and 489.8 mm (61.62, 51.18, 71.8, and 36.43 percent of rainfall) respectively. The result of this research show that after forest rehabilitation caused remarkedly an increase soil moisture storage and decrease streamflow due to nonuniform rainfall period eventhoung it showed higher amount of rainfall in dry period than the previous recored.
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