Rivers in Yunhe County belong to two main tributaries of the upper reaches of Oujiang River: one is Longquan River, the main stream of Oujiang River, and the other is Wutongkeng, a tributary of Oujiang River. The theoretical reserve of hydropower resources is 65.438+0.557 million kilowatts, and the annual power generation is 65.438+0.50 billion kWh. Wutongkeng has the best water resources. The development and utilization rate of the main stream of Yunfu River is the highest.
Longquan Creek winds out from southwest to northeast. Its main stream is 49 kilometers long and its drainage area is 837.93 square kilometers, accounting for 85. 16% of the total area. There are 37 main tributaries, including Maxiangxi, Fuyunxi, Shitangkeng and Quanxi. In addition, Wutongkeng originates from the foothills of Baihejian Mountain in the southwest, flows through Wu Tong Township in Jingning County and flows into Zhajiang River, with a length of 24. 10 km and a drainage area of 146.07 km2, accounting for 14.84% of the total area.