STUDY ON THE DYNAMIC PROCESS OF RILL EROSION OF LOESS SLOPE SURFACE

被引：8

作者：

Zhanbin LI Kexin LU and Wenfeng DING The State key Laboratory of Loess Plateau and Dry Land Farming Yangling Shaanxi PRChina Xian University of Technology Xian Shaanxi PRChina ^{[1
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机构：

来源：

International Journal of Sediment Research | 2001年 / 02期

关键词：

Soil detachment rate; Pill erosion; Runoff energy consumption;

D O I：

暂无

中图分类号：

TV141 [泥沙性质、泥沙来源];

学科分类号：

081502 ;

摘要：

Rill erosion is a dominant process of morphological evolution of the Loess Plateau in China, and deliveries much loess sediment to rivers. Data from two flume experiments conducted on the bare and glass-covered beds indicated that the till flow develops into a series of rolling waves. The shear stress on the rill bed distributes unevenly both spatially and temporally. A new method based on the energy conservation law is proposed in this study. Thus the relationship between the runoff energy consumption from the interaction of water flow and slope bed and soil detachment is formulated. The results showed that the data for the soil detachment rate on slope （Dr） and the energy consumption of runoff （E1） fitted well with newly-developed function. The till erosion occurs when the runoff energy consumption exceeds a critical value.

引用

页码：308 / 314

页数：7