There are rivers in Huili County

Huili County has a well-developed water system. There are 42 rivers with a water area of ??more than 20 square kilometers, a total water area of ??4244 square kilometers, a length of 999 kilometers, an outbound flow of 75 cubic meters/second, and a river network density of 22 kilometers/100 square kilometers. The average annual precipitation is 1212 mm, the runoff depth is 518 mm, the total annual runoff is 2.3 billion cubic meters, and the groundwater is 600 million cubic meters.

The river flow in Huili County is stable and the natural gap is large. The county's theoretical water energy reserves reach 554,000 kilowatts, with an average of 13,800 kilowatts per capita, which is 3.5 times the world's per capita and four times the national per capita.