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[1]XIE Gang,XIE Yuangui,LIAO Xiaofeng,et al.Ecological Risk Assessment Based on Soil and Water Loss in Karst Area—A Case Study of Qiannan Prefecture[J].Research of Soil and Water Conservation,2018,25(03):298-304.

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Ecological Risk Assessment Based on Soil and Water Loss in Karst Area—A Case Study of Qiannan Prefecture

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 298-304 Column: Public date: 2018-04-10

Title:: Ecological Risk Assessment Based on Soil and Water Loss in Karst Area—A Case Study of Qiannan Prefecture

Author(s):: XIE Gang, XIE Yuangui, LIAO Xiaofeng, XIAO Jiujun, LU Lan; Institute of Guizhou Mountainous Resources, Guiyang 550001, China

Keywords:: soil erosion sensitivity; karst; landscape ecological risk; evaluation

CLC:: S157.1

DOI:: -

Abstract:: In order to reveal the correlation between soil and water loss and ecological pattern in karst area, the spatial characteristics of landscape ecological risk under the sensitive background of soil erosion are analyzed. The paper took Qiannan as the research case, combined RUSLE model and ERI evaluation method, we quantitatively analyzed the landscape ecological risk on County scale based on the sensitivity analysis of soil erosion. The results showed that:(1) to moderate, mild and low sensitive area based sensitivity of soil erosion in Qiannan Prefecture, the total area is 22 974.42 km², the proportion is 88.86%, but severe and extremely sensitive area account for only 11.14%, and the rainfall erosion force, surface undulation and desertification have the high spatial correlation; (2) low ecological risk zone mainly distributes in the area with slight soil erosion and mild sensitivity and cultivated land accounting for 72.07%; high ecological risk areas distribute in the regions with moderate and severe sensitivity, and large construction land area, showing that soil erosion sensitivity is higher, the regional ecological risk is high. The study shows that landscape ecological risk assessment from the perspective of soil erosion sensitivity and integration of landscape pattern and ecological environment quality information not only enriches the regional ecological risk assessment method, but also provides decision-making basis for regional ecological protection and restoration.

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