Major Factors Affecting Erosion and Runoff on Red Soil Slope Based on WEPP Model

MA Liang; ZUO Chang-qing

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Major Factors Affecting Erosion and Runoff on Red Soil Slope Based on WEPP Model

- Major Factors Affecting Erosion and Runoff on Red Soil Slope Based on WEPP Model
- Bulletin of Soiland Water Conservation Vol. 31, Issue 6, Pages: 26-29(2012)
- 作者机构：
  
  1. 山东省水利科学研究院山东省水资源与水环境重点实验室
  2. 中国水利水电科学研究院水利部水土保持生态工程技术研究中心
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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MA Liang, ZUO Chang-qing. Major Factors Affecting Erosion and Runoff on Red Soil Slope Based on WEPP Model[J]. Bulletin of Soiland Water Conservation, 2012, 31(6): 26-29.
DOI：

MA Liang, ZUO Chang-qing. Major Factors Affecting Erosion and Runoff on Red Soil Slope Based on WEPP Model[J]. Bulletin of Soiland Water Conservation, 2012, 31(6): 26-29. DOI：

摘要

利用229场侵蚀性自然降雨的小区观测数据

率定并验证了典型红壤坡面水蚀预测(WEPP)模型

并对模型的敏感性检验和弹性系数进行了分析。结果表明

红壤坡面土壤侵蚀对降雨量、雨强、细沟可蚀性、临界剪切力、坡长、坡度等6个输入参数的变化具有强敏感性;地表径流量对降雨量具有强敏感性

对雨强、初始饱和导水率、有效水力传导系数等参数存在弱敏感性。这些参数是影响红壤坡面侵蚀产沙产流的主要因素。

Abstract

A data set

which includes soil losses from field standard runoff plots established in red soil region during 229 rainfall events

was used to calibrate and validate the physically based soil erosion model(water erosion project

WEPP model).Meanwhile

sensitivity test and elastic coefficient analysis methods were applied to determine the major influencing factors of soil erosion and runoff on red soil slopelands.The results showed that erosion sediment yield is extremely sensitive to the input parameters including rainfall amount

intensity

rill erosion threshold

critical shear stress

slope length and gradient.Surface runoff is regulated strongly by the rainfall amounts

while is weakly sensitive to rainfall intensity

initial saturated hydraulic conductivity and effective hydraulic conductivity.In conclusion

all parameters aforementioned are the major controlling factors of soil erosion and runoff on red soil slopelands.

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Related Institution

Changsha General Survey of Natural Resources Center， China Geological Survey， Ningxiang

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Key Laboratory of;Soil and Water Conservation and Desertification Control， Ministry of Education， Beijing Forestry University

Soil and Water Conservation Bureau of the Xizang Autonomous Region，， Xizang

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