Gray Correlation Analysis on Influential Factors of Runoff and Erosion in Slope Lands

ZHANG Jing-jing; WANG Li

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Gray Correlation Analysis on Influential Factors of Runoff and Erosion in Slope Lands

- Gray Correlation Analysis on Influential Factors of Runoff and Erosion in Slope Lands
- Bulletin of Soiland Water Conservation Vol. 30, Issue 2, Pages: 159-162(2011)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院
  2. 中国科学院水利部水土保持研究所土壤侵蚀与旱地农业国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
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- Published：2011
- 稿件说明：
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ZHANG Jing-jing, WANG Li. Gray Correlation Analysis on Influential Factors of Runoff and Erosion in Slope Lands[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 159-162.
DOI：

ZHANG Jing-jing, WANG Li. Gray Correlation Analysis on Influential Factors of Runoff and Erosion in Slope Lands[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 159-162. DOI：

摘要

影响坡面径流的因素有降雨量、雨强、植被等诸多因子。在陕西省长武县王东沟小流域布设径流小区

采用灰色关联度的方法

对不同影响因子进行了对比分析

研究了降雨和植被对地表径流量和侵蚀量的影响。结果表明

降雨量与径流量、侵蚀量的关联度最大

各因子对径流量的影响系数排序为:降雨量>最大雨强>雨强>植被覆盖度

对侵蚀量的影响系数排序为:降雨量>雨强>最大雨强>植被覆盖度。植被覆盖度与径流量和侵蚀量的关系为:当覆盖度<25%时

径流量没有明显变化;当其>25%时

径流量随着覆盖度的增加减少;当覆盖度<50%时

随着覆盖度的增加

侵蚀量下降趋势明显;当其>50%时

随着覆盖度的增加

侵蚀量下降趋势趋于平缓。

Abstract

Many parameters were recognized as affecting factors of slope runoff

such as precipitation volume

precipitation intensity and vegetation.Runoff plots were established in a small watershed

Wangdonggou of Changwu County

Shaanxi Province.The method of grey rational degree was applied to analyze the effects of the precipitation and vegetation on slope runoff and erosion by comparing influencing factors.The results indicate precipitation had the highest rational degree with slope runoff and erosion.The parameters contributing to slope runoff in the descending order were rainfall volume

maximum rainfall intensity

rain intensity

and vegetation coverage.The parameters contributing to erosion in the descending order of rational degree were rainfall

rain intensity

maximum rainfall intensity

and vegetation coverage.When the coverage was lower than 25%

runoff volume was similar;when the coverage was over 25%

runoff volume reduced with increasing coverage.When the coverage was lower than 50%

the total erosion decreased rapidly with the increasing coverage.However

the erosion-reducing efficiency of the vegetation significantly decreased when the coverage was higher than 50%.

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Related Institution

College of Resources and Environmental Science, Fujian Agriculture and Forestry University

The State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling

The State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling

College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University

Inner Mongolia Academy of Water Conservancy Sciences

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