An Approaeh to Calculation of Sediment Reduction Comprehensive Control of Small Watershed in Loess Benefit in Plateau

Zhou Peihua; Wn Chunlong

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An Approaeh to Calculation of Sediment Reduction Comprehensive Control of Small Watershed in Loess Benefit in Plateau

- An Approaeh to Calculation of Sediment Reduction Comprehensive Control of Small Watershed in Loess Benefit in Plateau
- Bulletin of Soiland Water Conservation Vol. 10, Issue 1, Pages: 18-22(1991)
- 作者机构：
  
  中国科学院水利部西北水土保持研究所陕西杨陵
- 作者简介：
- 基金信息：
- DOI：
  CLC： S157.1
- Published：1991
- 稿件说明：
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Zhou Peihua, Wn Chunlong. An Approaeh to Calculation of Sediment Reduction Comprehensive Control of Small Watershed in Loess Benefit in Plateau[J]. Bulletin of Soiland Water Conservation, 1991, 10(1): 18-22.
DOI：

Zhou Peihua, Wn Chunlong. An Approaeh to Calculation of Sediment Reduction Comprehensive Control of Small Watershed in Loess Benefit in Plateau[J]. Bulletin of Soiland Water Conservation, 1991, 10(1): 18-22. DOI：

摘要

小流域综合治理的减沙效益，目前还没有比较理想的计算方法，一般都是根据治理前后输沙模数的差异进行推算。本文指出：输沙模数不单纯因为经过综合治理而减小；同时还受降雨情况的影响，因而变化幅度很大。并且输沙模数与降雨量等特征值的相关性不好，故给减沙效益计算带来许多困难。作者经过统计分析发现，输沙模数与径流量之间密切相关。因此可以根据径流量的变化情况，推算出降雨情况对输沙模数的影响，从而可以比较准确地计算减沙效益。

Abstract

A satisfied method for calculating sediment reduction bencfit in tomprehensive control of small watershed is not available at present.The difference of sediment delivery modulus before and after control is usually used to estimate the benefit

This paper pointed out that the sediment delivery modulus had a great variance as it's not reduced by synthetic control but by precipitation

and there was no Significated interrelation between sediment delivery modulus and characteristic value of precipitation etc

which brought about difficulty of benefit estimating

The author found that there was a closed relationship between Sediment delivery modulus and runoff rate

and the effect of preciptation on sediment modulus could be estimated by runoff rate

so that the sediment reduction benefit might be calculated accurately.

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