Geography
The area, about 45 squares kilometers, consists of both ground and water in reservoir. The vastly forest upper the Kang Kra Jan Dam is on complicated mountain ranges which the highest peak is 1,200 meters above sea level and approximately high 500 meter above sea level. Most of the mountains are Granite Mountain, few are Limestone Mountains, and many are full of fluoride. And also most of the area is covered by rain forest so that is the source of Phet Buri River and Pran Buri River.