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The Scientific World Journal
Volume 2013, Article ID 636521, 7 pages
http://dx.doi.org/10.1155/2013/636521
Research Article

Estimation Model of Soil Freeze-Thaw Erosion in Silingco Watershed Wetland of Northern Tibet

1Chinese Academy of Sciences of Mountain Hazards and Environment, Chengdu 610041, China
2College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China

Received 28 March 2013; Accepted 13 June 2013

Academic Editors: J. Bai, H. Cao, B. Cui, and A. Li

Copyright © 2013 Bo Kong and Huan Yu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The freeze-thaw (FT) erosion is a type of soil erosion like water erosion and wind erosion. Limited by many factors, the grading evaluation of soil FT erosion quantities is not well studied. Based on the comprehensive analysis of the evaluation indices of soil FT erosion, we for the first time utilized the sensitivity of microwave remote sensing technology to soil moisture for identification of FT state. We established an estimation model suitable to evaluate the soil FT erosion quantity in Silingco watershed wetland of Northern Tibet using weighted summation method of six impact factors including the annual FT cycle days, average diurnal FT phase-changed water content, average annual precipitation, slope, aspect, and vegetation coverage. Finally, with the support of GIS, we classified soil FT erosion quantity in Silingco watershed wetland. The results showed that soil FT erosion are distributed in broad areas of Silingco watershed wetland. Different soil FT erosions with different intensities have evidently different spatial and geographical distributions.