黄土高原地区生态淤地坝效益分析探讨——以陕西延安地区为例

Studies on the Benefit of the Silt-retention Dam of the Loess Plateau——A Case Study of Yan’an Area

淤地坝工程是黄土高原区非常重要的水土保持措施之一,淤地坝的效益与一般水土保持建设工程的效益既有相同之处,又有不同之处。以陕西延安地区为例,对淤地坝的效益计算从生态安全、防洪减沙、淤积造地等几个方面进行了分析计算,为延安地区淤地的效益分析与评价提供理论和实践依据。

Silt retention-dam is a mainly measures of soil and water conservation of the Loess Plateau, it plays an import role in the silt control in the middle area of the Loess Plateau. Silt retention-dam benefits include ecosystem safety, flooding control, and silt-land cultivation benefits. The author calculated that the silt retentlon-dam of the Yanan district, north area of the Shaanxl province. There is about 27 000 pieces silt retention-dam will be built in the Yanan, after it finished, it will keep 0. 167 billion ton sediment each year during the filling up period, and increased the cultivated benefit 0.5 billion Yuan （RMB） each year after it filled up.