Majority (14.13 percent of watershed) with average rainfall of 800-900 mm in the range per year and the number of rainy days more than 90 days per year. In part, it was found that the factors of soil resources, soil texture characteristics (44.89 percent of watershed) in sandy areas. The drainage of the soil. There are plenty of extremely low soil, almost all surfaces (79.38 percent of watershed). There is a low slope of land utilization factors, studies have found that the majority (64.02 percent watershed) was used as an agricultural area, by most of the watershed basin of the Lam Kong trucker. Density of the river is 0.5-1.0 km per sq km. By the majority of the distance from the source of irrigation to 6,000 meters, which can affect access to water resources of agriculture.
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