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| Methods and measures of building water saving and ecological sediment storage dam for farmland forming in the Loess Plateau |
| Yang Aimin, Wang Hao, Gao Jizhang, Cao Wenhong |
| China Institute of Water Resources and Hydropower Research, 100044, Beijing, China |
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Abstract Sediment storage dam for farmland forming was a key measure for the soil erosion control in the Loess Plateau area. Their building on a large scale in this area not only had an important significance to improving ecological environment, promoting sustainable economic and social development and building a relatively comfortable society in an all round way, but also played an unreplaceable role in reducing sediment entering the Yellow River and ensuring security of the river. On the basis of great obtained achievements of their building in this area, the distributing characteristics of their number, farmland areas built by sediment storage and sediment storage quantity by regions and river basins were analyzed. In the light of problems existing in the dams building, which included unreasonable design, low standard, severe pollution in non-point source of dam, large ineffective evaporation and so on, the concepts of individual dam system and water saving and ecological sediment storage dam for farmland forming were put forward. The basic methods of the dams building and its ensuring measures were also proposed. One case of the dam building was introduced and analyzed in order to provide scientific basis for the dams building on a large scale.
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Received: 24 December 2004
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