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[1]CHEN Jinke,PU Junbing,LI Jianhong,et al.Coupling of Rocky Desertification Distribution and Soil Erosion Under Different Slope Grades in a Typical Karst Basin[J].Research of Soil and Water Conservation,2020,27(05):1-9.

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Coupling of Rocky Desertification Distribution and Soil Erosion Under Different Slope Grades in a Typical Karst Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 05 Page number: 1-9 Column: 目次 Public date: 2020-08-20

Title:: Coupling of Rocky Desertification Distribution and Soil Erosion Under Different Slope Grades in a Typical Karst Basin

Author(s):: CHEN Jinke^1,2, PU Junbing², LI Jianhong², ZHANG Tao², WANG Sainan^1,2, ZENG Rui^1,2; (1.Chongqing Key Laboratory of Karst Environmental Science, Southwest University School of Geographical Sciences, Chongqing 400715, China; 2.Institute of Karst Geology, Chinese Academy of Geological Sciences/Key Laboratory of Karst Dynamics, Ministry of Natural Resources & Guangxi, Guilin, Guangxi 541004, China)

Keywords:: rocky desertification; soil erosion; underground river basin; slope

CLC:: S157

DOI:: -

Abstract:: Meteorological data, remote sensing data in the Nantong underground river basin and improved RUSLE model were used to quantitatively analyze the relationship between rocky desertification and soil erosion in different slopes, with the support of remote sensing and geographic information technology. The results show that:(1)the rocky desertification area in the Nandong underground river basin is 740.64 km² with the risk probability of 77.96%, which is dominated by moderate rocky desertification grade; the soil erosion area in the area covered by karst is 444.54 km² with the risk probability of 66.55%, which is dominated by micro-erosion grade; the soil erosion area in the bared karst area is 688.86 km² with the risk probability of 72.51%, which is dominated by light and moderate soil erosion grade;(2)rocky desertification and soil erosion in bared karst areas mainly occurre in the slope range of 5°～25°, soil erosion area first decreases and then increases with the increase of rocky desertification intensity, when the slope is <25°; when the slope is >25°, the soil erosion area continuously decreases with the increase of rocky desertification intensity;(4)in the soil erosion areas in the bared karst area, the rocky desertification area in various slope grades first increases and then decreases with the increase of soil erosion grade; the rocky desertification area reaches the maximum in the moderate soil erosion region; The risk probability of rocky desertification in the studied area shows the complex correlation with soil erosion grade, which is not a single liner relationship between them. Because the intensity of soil erosion is large and the problem of rocky desertification in study area is severe, it is necessary to pay more attention to the control of rocky desertification and soil erosion in the slope range of 5°～25°in this study area.

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Last Update: 2020-08-25