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[1]ZHANG Chao,CHEN Guojian,LI Chunjuan,et al.Estimate of Soil Erosion Amount of the Ecological Conservation Development Area in Chongqing Based on the USLE Model[J].Research of Soil and Water Conservation,2017,24(03):33-38.

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Estimate of Soil Erosion Amount of the Ecological Conservation Development Area in Chongqing Based on the USLE Model

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 03 Page number: 33-38 Column: Public date: 2017-06-28

Title:: Estimate of Soil Erosion Amount of the Ecological Conservation Development Area in Chongqing Based on the USLE Model

Author(s):: ZHANG Chao¹, CHEN Guojian^1,2, LI Chunjuan¹, XIAO Zhuoyong¹, LI Chunli¹, LI Juanjuan¹, LIAO Liangyu¹; 1. Geography and Tourism College, Chongqing Normal University, Chongqing 400047, China;
2. Chongqing Key Laboratory of Surface Processes and Environmental Remote Sensing in the Three Gorges Reservoir Area, Chongqing 400047, China

Keywords:: soil erosion amount; USLE model; northeast of Chongqing; ecological conservation development area

CLC:: S157.1

DOI:: -

Abstract:: USLE model was used to estimate soil erosion in the Ecological Conservation Development Area in Chongqing, and the soil erosion intensity of this area was classified according to criterion. The distribution characteristics of soil erosion intensity for different rainfall erosion forces, slope grades and soil types were analyzed. The results indicate that the amount of soil erosion in this research area roughly presents the trend of decreasing from the northeast to the southwest, the soil erosion was the most severe in the eastern highlands of the study area, and the soil erosion in the hilly region of the west was relatively slight, the average soil erosion modulus in this area was 30.15 t/(hm²·a), the amount of soil erosion was 10 2.2085 million t/a. The distribution of soil erosion intensity in every district can be divided into three categories: (1) the key preventing and protecting area, the soil erosion of these areas is mainly micro and slight erosion, vegetation coverage is higher than others, but there is a danger of aggravating the soil erosion, representative districts such as Zhongxian, Liangping, and Dianjiang; (2) the key supervising area, the soil erosion of these areas is mainly middle intensity erosion and intensity erosion, soil erosion is relatively serious, representative districts: Yunyang, Wanzhou, Wushan, Fengjie and Fengdu; (3) the key controlling area, the soil erosion of these areas is mainly the extreme intensity erosion and the violent intensity erosion, soil erosion is the most serious, representative districts: Wuxi, Kaixian and Chengkou. The soil erosion of the areas that rainfall erosivity ranges between 3 000~4 000 (MJ·mm)/(hm²·h·a), the slope is above 25 degrees, the soil is calcareous soil, purplish soil or yellow cinnamon soil, erosion is identified as the intensive level, the extreme intensity erosion and the violent intensity erosion, those areas are the focus of soil erosion control.

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