Effects of landforms on the erosion rate in a small watershed by the 137Cs tracing method

被引：19
|
作者：
Li, Mian [1 ]
Yao, Wenyi [1 ]
Li, Zhanbin [2 ,3 ,4 ]
Liu, Puling [3 ,4 ]
Shen, Zhenzhou [1 ]
机构：
[1] Minist Water Resources, Key Lab Sediment Res Yellow River, Yellow River Inst Hydraul Res, Zhengzhou 450003, Henan, Peoples R China
[2] Xian Univ Technol, Xian 710048, Shaanxi, Peoples R China
[3] Chinese Acad Sci, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
[4] Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2010年 / 101卷 / 05期
关键词：
Landform; Soil erosion; Cs-137; Purple Hilly Area; ESTIMATING SOIL-EROSION; LOESS PLATEAU; SLOPE GRADIENT; DEPOSITION; RUNOFF; LENGTH; CHINA;
D O I：
10.1016/j.jenvrad.2010.02.011
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
It's very important to analyze and evaluate quantitatively the effects of landforms on soil erosion for the prevention and treatment of soil loss in a small watershed. The objective of this study was to evaluate the effects of landform factors on erosion rate by the Cs-137 tracing method in a small watershed in the Purple Hilly Area of China. The erosion rates under different slope lengths, slope gradients and slope aspects were estimated in Xiangshuitan watershed in the Purple Hilly Area in Sichuan Basin by the Cs-137 tracing method. The results showed that the erosion rate decreased exponentially with downslope distance, and it increased with increasing slope gradient during the scope of 5 degrees-16 degrees. The slope aspect had great impact on the erosion rate, and the hillside on the sunny slope had larger erosion rate than that on the shady slope, particularly for the farmland. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：380 / 384
页数：5
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