Construction of Water Erosion Prediction Model at Small Watershed in the Loess Hilly and Gully Region

JIA Yuan-yuan; ZHENG Fen-li; YANG Qin- ke; WANG Zhan-li

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Construction of Water Erosion Prediction Model at Small Watershed in the Loess Hilly and Gully Region

- Construction of Water Erosion Prediction Model at Small Watershed in the Loess Hilly and Gully Region
- Bulletin of Soiland Water Conservation Vol. 23, Issue 2, Pages: 5-7(2004)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所,陕西杨凌,712100
  2. 西北农林科技大学水土保持研究所,陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
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- Published：2004
- 稿件说明：
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JIA Yuan-yuan, ZHENG Fen-li, YANG Qin- ke, et al. Construction of Water Erosion Prediction Model at Small Watershed in the Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2004, 23(2): 5-7.
DOI：

JIA Yuan-yuan, ZHENG Fen-li, YANG Qin- ke, et al. Construction of Water Erosion Prediction Model at Small Watershed in the Loess Hilly and Gully Region[J]. Bulletin of Soiland Water Conservation, 2004, 23(2): 5-7. DOI：

摘要

根据黄土丘陵沟壑区侵蚀产沙垂直分带性规律

提出小流域土壤侵蚀方式发生部位界定方法。基于黄土丘陵沟壑区侵蚀环境特点

设计了GIS支持下的小流域分布式水蚀预报模型结构

模型考虑的侵蚀过程包括雨滴击溅侵蚀、片蚀、细沟侵蚀、浅沟侵蚀、切沟侵蚀以及沟道侵蚀。同时

提出模型各模块的计算方法

根据动态物质平衡原理

完成了流域侵蚀产沙过程演算。

Abstract

According to erosion vertical zone distribution in the loess hilly and gully region

the methods for demarcating distribution slope location of soil erosion patterns at small watershed are put forward.Based on erosion environmental characters in the loess hilly and gully region

the framework of the distributed water erosion prediction model at small watershed supported by GIS is designed.The fundamental erosion processes in this model included splash detachment

sheet flow detachment and deposition

rill flow detachment and deposition

ephemeral gully flow detachment and deposition

gully flow detachment and deposition

and channel flow detachment and deposition.Meanwhile

the calculation processes of this model are discussed in detail.In term of the principle of dynamic balance of mass

the calculation of sediment yield in the whole watershed is accomplished.

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Related Institution

College of Resource and Environment, Hu’nan Agricultural University, Changsha 410128, Hu’nan Province

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