Technical index of Angezhuang Reservoir

1. Watershed Features: Angezhuang Reservoir is located in the upper reaches of Xiyishui River in Angezhuang Village, Yixian County, Baoding City, Hebei Province, with a controlled watershed area of 476 km ㎡, accounting for 93.5% of the watershed area of Yishui Mountain and 42.6% of the total watershed area. Zhongyishui, formerly known as Wushui, originated in Wu Huiling at the eastern foot of Taihang Mountain in Yixian County, Baoding City, with a total drainage area of119km2. Juma River in the north, Caohe River and Waterfall River in the south. The current is swift and the river bends. The eight tributaries in the upper reaches form two main tributaries in a fan-shaped distribution. It flows eastward 500 meters west of Angezhuang Village. From Yaoshunkou in Yixian County, West Shui Ye, Gaocun in Dingxing County, Pinggang and Hanoi to Beihedian, it flows into the South Juma River on the west side of Beijing-Guangzhou Railway. This river is 86 kilometers long. It flows through a mountainous area of 44km, with a drainage area of 510km2. The river banks are mostly steep mountains, with a river width of 200-300 m and an average longitudinal slope of 1/200. It flows through the plain for 42km, with a drainage area of 609km2, and there are wide terraces on both banks. The river is 400 ~ 700 meters wide with an average longitudinal slope of 1/700. The width of the main channel is 20 ~ 80m. The watershed controlled by the reservoir has good vegetation and light soil erosion. There are 8 main tributaries in the basin, and 6 small reservoirs are distributed on the tributaries, with a total control area of 70.5 km ㎡ km2 and a total storage capacity of 65,438+644,000 cubic meters. The largest reservoir is Lianggang Xiao (I) Reservoir, with a control area of 32k㎡ and a storage capacity of 6.5438+0.04 million cubic meters. Located in the south branch of the reservoir, 25 kilometers away from the dam site.

2. Dam: Angezhuang Reservoir dam is an earth dam, with a maximum dam height of 49.4m, a crest length of 128 1m, and a crest width of 5.0m m. The upstream is provided with a masonry breakwater, and the upstream and downstream of the dam are protected by dry masonry.

3. Spillway: The expansion of spillway was completed in 1972, with a maximum discharge capacity of 3,744 cubic meters per second. Weir type is practical.

4. Exit tunnel: Exit tunnel includes flood discharge tunnel and water conveyance tunnel. The spillway tunnel is a circular pressure tunnel, and the entrance adopts a flat steel gate and an electric screw hoist. The water conveyance tunnel is arranged at the south dam head, which is a circular pressure tunnel with an arc steel gate at the entrance.

5. Hydropower Station: The power station is located on the right bank of the river bed and is equipped with three units.

6. Reservoir inundation treatment: the land acquisition elevation of Angezhuang Reservoir is 163m, the cultivated land is 8604mu, the resettlement elevation is 165m and the immigrant population is 6 18 1.

7. Irrigation water supply: The original designed irrigation area of Angezhuang Reservoir is 490,000 mu, and the annual irrigation water consumption is 6,543,857,600 cubic meters.