Estimation of soil erosion considering soil loss tolerance in karst area
- 1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Road, Guiyang 550081, Guizhou Province, China
- 2University of Chinese Academy of Sciences, Beijing 100049, China
- 3Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China
- 4School of Resources and Environment of Qinzhou University, Qinzhou 535099, China
- 1State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 99 Lincheng West Road, Guiyang 550081, Guizhou Province, China
- 2University of Chinese Academy of Sciences, Beijing 100049, China
- 3Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, China
- 4School of Resources and Environment of Qinzhou University, Qinzhou 535099, China
Abstract. The prediction of soil erosion is critical to regional ecological assessment and sustainable development. However, due to the geological background of the karst area, the soil holding capacity is very limited, so it is necessary to consider the allowable loss of soil. Here we took thermodynamic dissolution model of carbonate rocks and the lithological characteristics to estimate soil loss tolerance, and corrected and quantitatively evaluated the soil erosion. Major findings are as follows: (1) The soil loss tolerance of homogenous carbonate rocks is 31.10 t · ha · yr−1, carbonate rock intercalated with clastic rocks is 120.81 t · ha · yr−1, carbonate/clastic rock alternations is 282.55 t · h · yr−1, and clastic rock is 500 t · ha · yr−1. (2) After the correction of the soil loss tolerance, the average annual amount of soil loss in the study area is 3.08 t · ha · yr−1, which is 41.12 % of the model. The predicted value of soil erosion is nearly the same as the observed value after modification. (3) It is necessary to reconsider the risk assessment model of soil erosion applicable to karst areas. This paper proposes an idea to estimate soil erosion based on the allowable loss of soil, which is more scientifically and accurately to reflect the soil erosion status of the study area compared with the traditional way. This study provides a corresponding reference for the formulation of soil and water conservation policies in China and the world's karst regions.
Yue Cao et al.


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RC1: 'Nhess-2018-310 (referee) - referee comment', Anonymous Referee #1, 29 Nov 2018
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AC1: 'Response to Referee #1', xiaoyong Bai, 24 Dec 2018
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AC1: 'Response to Referee #1', xiaoyong Bai, 24 Dec 2018
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RC2: 'Review “Estimation of soil erosion considering soil loss tolerance in karst area” by Yue Cao et al.', Anonymous Referee #2, 07 Dec 2018
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AC2: 'Response to Referee #2', xiaoyong Bai, 24 Dec 2018
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AC2: 'Response to Referee #2', xiaoyong Bai, 24 Dec 2018


-
RC1: 'Nhess-2018-310 (referee) - referee comment', Anonymous Referee #1, 29 Nov 2018
-
AC1: 'Response to Referee #1', xiaoyong Bai, 24 Dec 2018
-
AC1: 'Response to Referee #1', xiaoyong Bai, 24 Dec 2018
-
RC2: 'Review “Estimation of soil erosion considering soil loss tolerance in karst area” by Yue Cao et al.', Anonymous Referee #2, 07 Dec 2018
-
AC2: 'Response to Referee #2', xiaoyong Bai, 24 Dec 2018
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AC2: 'Response to Referee #2', xiaoyong Bai, 24 Dec 2018
Yue Cao et al.
Yue Cao et al.
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