General situation of Xingxingshao Reservoir

The dam site of Chaluhe large reservoir is located in Chaluhe Town, Yongji County, Jilin Province. "Star" means "hazelnut" in Manchu; In addition, there was a meteorite landing here, which was also the whistle of crossing the fork river, hence the name Star Whistle. The catchment area of the reservoir is 845 square kilometers, with a total storage capacity of 265 million cubic meters. It is a large-scale water conservancy project with irrigation as its main function and comprehensive utilization of flood control, power generation, fish farming and tourism.

The landform of Xingxingshao reservoir area is denuded low mountains and high hills, and its lower rocks are composed of granite porphyry, andesite and quartzite. The average temperature in the reservoir area for many years is 4.8 degrees Celsius, and the average annual precipitation for many years is 69 1.7mm, of which the precipitation from June to September accounts for 72.5% of the whole year. The annual average flow of the dam site is 6.79 cubic meters per second, the annual average runoff is 26.5438+0.4 billion cubic meters, and the annual average evaporation is 744 millimeters. 1 1 de1from late October to mid-April of the following year, the maximum ice thickness is 0.86m. The water quality of the reservoir is good, and it is Class III.

The reservoir hub consists of dam, spillway tunnel, water conveyance tunnel and power station. The dam is a variety of earth dams with clay core walls, with a crest length of 5 10/0m, a height of 33.2m and a width of 5m. The spillway tunnel is located on the left bank, with a designed maximum flow of 526 cubic meters per second. The water conveyance tunnel is located on the right bank, and the designed maximum excess flow is 53 cubic meters per second. The hydropower station is behind the dam with a total installed capacity of 2.5 MW. The reservoir is designed according to the once-in-200-year flood, and the maximum flood water can protect the dam. The flood control storage capacity is 203 million cubic meters, and the Li Xing storage capacity is 94 million cubic meters; Design irrigation area 1.65438+ 10,000 hectares, and 2500 hectares of farmland for flood control and waterlogging prevention; The average annual power generation for many years is 53 1. 1 10,000 kwh; The water area of fish culture in the reservoir is 65,438+0,000 hectares, with an average annual output of 654,380+600,000 kilograms of fresh fish. Since its operation, the maximum annual water inflow of the reservoir is 472 million cubic meters, and the minimum annual water inflow is 49 million cubic meters. The highest water level is 246.70m (1August 994 17) and the lowest water level is 233.32m (2001May 27th); Maximum water inflow1340m3 per second (12 August 973).