Technical index of Dongwushi Reservoir

Dongwushi Reservoir is located in Cixian County, Hebei Province, on the upper reaches of Fuyang River, with a controlled drainage area of 340 km ㎡ and a total storage capacity of 1.8 1 100 million cubic meters. According to the analysis of the annual rainfall data of Dongwushi Station 195 1 to 1986 for 36 years, the average rainfall for many years is 560mm, which varies greatly during the year and the annual rainfall distribution is uneven. The rainfall in flood season accounts for more than 75% of the annual rainfall. Fuyang River is rich in annual runoff, and the water comes continuously all the year round. The Fuyang River above the reservoir has an average annual runoff of 380 million cubic meters and an average annual sediment discharge of 365,438+0,000 cubic meters. The historical maximum inflow peak flow1.920m3/s occurred on 1.963 on August 6th, and the historical maximum flood level was 65438+.

dam

Dongwushi Reservoir Project is mainly composed of homogeneous earth dam, spillway tunnel, power generation tunnel and auxiliary dam on the left bank. The dam is a homogeneous roller compacted earth dam with a masonry breakwater upstream. The upstream of the dam is dry masonry slope protection, and the downstream is pebble and turf slope protection.

Emergency spillway

The emergency spillway is an open channel built on the left bank.

Chushuidong

The outlet tunnel includes flood discharge tunnel and irrigation power generation tunnel. The spillway tunnel is located on the right side of the main river channel in the middle of the dam, with an arc steel gate at the entrance, a closed shaft in the intake tower, and 1 plane maintenance gates and 3 arc working gates in the tower. The irrigation power generation tunnel is a circular pressure tunnel, the intake tower is a closed shaft, and there are two flat steel gates and two concrete maintenance gates in the tower.

hydropower station

Two power stations have been installed.

Reservoir inundation treatment

Land acquisition elevation of Dongwushi Reservoir 1 10m, cultivated land15500mu, resettlement elevation1/2m, and resettlement population 13879.

Irrigation and water supply

The irrigation area of Dongwushi Reservoir is 640,000 mu, and the annual irrigation water consumption is 3910.7 million cubic meters. Dongwushi Reservoir undertakes the water supply task of Handan City, with an annual water supply of10.42 billion cubic meters.