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Wednesday, 25 February 2015 00:00

Effects of Dams on Downstream Reservoir Fisheries, Case of Nam Ngum

In 1971 the first hydropower dam in the Lao PDR was completed. The construction of the dam in the Nam Ngum River created a reservoir with an area of 450 km2 at full supply level. Electricity generated at the Narn Ngurn power- house has been the major foreign currency earner for the Lao PDR. The current annual gross power revenues of the Nam Ngum I dam are estimated at approximately US$36 million. The Nam Xong water diversion scheme came on line in 1995. The Nam Leuk hydropower and water diversion project is under construction. Another six hydropower projects upstream of the existing Nam Ngum reservoir are under consideration (see Map). A definite positive impact of hydropower development is the fish production and economic value of fisheries in newly created reservoirs. This article discusses potential impacts of hydropower development on down- stream reservoir fisheries and aquatic diversity. Information used for this paper has been gathered during the Nam Ngum Watershed Management technical assistance project, co-financed by the Asian Development Bank (ADB) and the Government of Denmark.

Additional Info

  • Location: 102.64E,18.46N
  • Source: MRCS
  • Type of resource: Document
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