It belongs to Jialing River system. The front, middle and back rivers flow into Zhouhe River in the east of the city. The basin area of the county accounts for 88% of the county's land area, with a natural drop of 16.6-327 meters, an average annual flow of 34- 160 cubic meters/second, a hydropower reserve of 358,000 kilowatts and an annual electric energy resource of 31400,000 kwh. The four main streams are navigable, with a navigable mileage of 287 kilometers, and can carry the ship's load 1.5- 10 ton.