Huanglongtan Dam

Huanglongtan Dam
Location of Huanglongtan Dam in China
Country China
Location Shiyan
Coordinates 32°40′33″N 110°31′22″E / 32.67583°N 110.52278°E / 32.67583; 110.52278Coordinates: 32°40′33″N 110°31′22″E / 32.67583°N 110.52278°E / 32.67583; 110.52278
Status Operational
Construction began 1969
Opening date 1976
Owner(s) Hubei Provincial Government
Dam and spillways
Type of dam Concrete gravity
Impounds Du River
Height 107 m (351 ft)
Length 371 m (1,217 ft)
Elevation at crest 252 m (827 ft)
Width (crest) 20 m (66 ft)
Dam volume 980,000 m3 (1,281,792 cu yd)
Spillway type Controlled, six sluice gates
Spillway capacity 11,200 m3/s (395,524 cu ft/s)
Reservoir
Total capacity 1,228,000,000 m3 (995,556 acre·ft)
Catchment area 11,140 km2 (4,301 sq mi)
Normal elevation 247 m (810 ft)
Power station
Commission date 1974/2004
Turbines 2 x 85 MW
2 x 170 MW
Francis-type
Installed capacity 510 MW

The Huanglongtan Dam is a concrete gravity dam located on the Du River, a tributary of the Han River. It is located 25 km (16 mi) west of Shiyan in Hubei Province, China. The main purpose of the dam is hydroelectric power generation but it also provides for flood control. It was constructed between 1969 and 1976 and support a 510 MW power station.

Background

The Huanglongtan Dam and two other projects on the river (Songshuling and Pankou Dams) were surveyed in 1954 and final designs were prepared in 1964. Construction on Huanglongtan, the first of the projects to be implemented, began in April 1969.[1] The original 85 MW generators were commissioned in 1974 and the dam was complete in 1976. The entire project was accepted by the state in 1978.[2] In 1980, the dam experienced a 50-year flood with river flow peaking at 11,500 m3/s (406,119 cu ft/s). The flood inundated the power station as the dam was not prepared for the inflow. This was due to mis-communication within the basin and a lack of a proper hydrological forecast system.[3] In May 2003 the dam's power plant underwent an expansion which included the installation of two new 170 MW Francis turbines along with a new power house and water delivery system. The first of the two generators was operational at the end of 2004 and the project complete in 2005.[2][4]

Design

The concrete gravity dam is 107 m (351 ft) tall, 371 m (1,217 ft) long and has a structural volume of 980,000 m3 (1,281,792 cu yd). The dam's crest is 20 m (66 ft) wide and sits at an elevation of 252 m (827 ft) above sea level. Sitting at the head of a 11,140 km2 (4,301 sq mi) catchment area, the dam withholds a reservoir of 1,228,000,000 m3 (995,556 acre·ft) of which 150,000,000 m3 (121,607 acre·ft) is reserved for flood storage. Normal reservoir elevation is 247 m (810 ft). The dam's spillway consists of six 12 m (39 ft) high and 10 m (33 ft) wide sluice gates and has a maximum discharge capacity of 11,200 m3/s (395,524 cu ft/s). The dam's original power station is located just downstream on the left bank of the river and contains 2 x 85 MW Francis turbine-generators. The expansion power plant is located 200 m (656 ft) away from the original and contains 2 x 170 MW Francis turbine-generators.[1][2][5]

See also

References

  1. 1 2 "Hydroelectric Power Plants in China - Henan & Hubei". IndustCards. Retrieved 2 September 2011.
  2. 1 2 3 "Yellow Longtan hydropower plant" (in Chinese). Shiyan Government. Retrieved 2 September 2011.
  3. ↑ Berga, edited by L. (1998). Dam safety : proceedings of the International Symposium on New Trends and Guidelines on Dam Safety, Barcelona, Spain, 17-19 June 1998. Rotterdam: Balkema. p. 1262. ISBN 90-5410-974-2.
  4. ↑ "Huang Longtan Hydropower Plant 2 * 170MW expansion project". Hydro Electric Power System Engineering Company. Retrieved 2 September 2011.
  5. ↑ "China’s highest Concrete Gravity Dams". Chinese National Committee on Large Dams. Retrieved 2 September 2011.
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