Analysis on the Benefits of Runoff and Sediment Reductiori} and .Their Characteristics in Jinghe Watershed

Ran Dachuan

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Analysis on the Benefits of Runoff and Sediment Reductiori} and .Their Characteristics in Jinghe Watershed

- Analysis on the Benefits of Runoff and Sediment Reductiori} and .Their Characteristics in Jinghe Watershed
- Bulletin of Soiland Water Conservation Vol. 11, Issue 5, Pages: 21-28(1992)
- 作者机构：
  
  黄委会西峰水保站甘肃省西峰市,745000
- 作者简介：
- 基金信息：
- DOI：
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- Published：1992
- 稿件说明：
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Ran Dachuan. Analysis on the Benefits of Runoff and Sediment Reductiori} and .Their Characteristics in Jinghe Watershed[J]. Bulletin of Soiland Water Conservation, 1992, 11(5): 21-28.
DOI：

Ran Dachuan. Analysis on the Benefits of Runoff and Sediment Reductiori} and .Their Characteristics in Jinghe Watershed[J]. Bulletin of Soiland Water Conservation, 1992, 11(5): 21-28. DOI：

摘要

该文对泾河流域的水沙特性及水沙变化作了分析

并根据其产流产沙规律进行了流域“水文法”减水减沙效益计算

得出:1970～1989年综合治理减水效益为7.5%

减沙效益为14.4%。而降雨量减少影响减水32%

影响减沙48%。经与实施水利水保措施效益的结果对比验证

二者基本接近。同时

对该流域80年代沙量锐减的原因分析表明:80年代减沙的主要原因是降雨量减少

对减沙的影响程度为63%

综合治理影响程度为37%。

Abstract

The characteristics of runoff and sediment and their changes in Jinghe watershed.were analysed in detail

According to the basis‘laws of forming runoff and sediment

the hydrological method was used to calculate the benefits of runoff and sedi-ment reduction

It was concluded that durng 1970}1989 the benefits of runoff and sediment reduction account for 7

5 percent and 14

4-。en respectively through the comprehensive control on the watershed

and the influence f runoff and sediment.reduction for 32 percent and 48 percent respectively by the reduced precipitation

C3ood_identity is found between the results of hydrological method and the ones of im plementing the measures of soil and water conservation

After of the sharp reduction of sediment in 1980s

it was indicated thsediment reduction are reduced precipitation

The influences anvaysing the causes at the mayor causes of redued precipitation and comprehensive control on sediment reduceion are respectively

about gg percent and 37 percent

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