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[1]Liu Dandan,Liu Ya,Xia Xiaolin,et al.Evaluation and Correction of Soil Erodibility K Value in the Key Soil Loss Areas of Anhui Province[J].Research of Soil and Water Conservation,2024,31(05):148-154.[doi:10.13869/j.cnki.rswc.2024.05.044]

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Evaluation and Correction of Soil Erodibility K Value in the Key Soil Loss Areas of Anhui Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 05 Page number: 148-154 Column: Public date: 2024-08-10

Title:: Evaluation and Correction of Soil Erodibility K Value in the Key Soil Loss Areas of Anhui Province

Author(s):: Liu Dandan^1,2, Liu Ya³, Xia Xiaolin^1,2, Liu Gang^3,4; (1.Anhui Province Key Laboratory of Water Conservancy and Water Resources, Bengbu, Anhui 233000, China; 2.Water Resources Research Institute of Anhui Province and Huaihe River Commission, Ministry of Water Resources, Hefei 230088, China; 3.College of Soil and Water Conservation Science and Engineering /Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 4.Institute of Soil and Water Conservation CAS & MWR, Yangling, Shaanxi 712100, China)

Keywords:: soil and water loss; soil erodibility; runoff plot; Anhui Province

CLC:: S157

DOI:: 10.13869/j.cnki.rswc.2024.05.044

Abstract:: [Objective]The aims of this study are to assess the accuracy of soil erodibility K calculated by different methods in the key soil loss areas of Anhui Province, and to refine each calculation method based on the measured erodibility K. [Methods]The Nomo equation, modified Nomo equation, EPIC model, DG model and Torri model were utilized to estimate the soil erodibility K values. Based on monitoring data from runoff plots in Huoshan County, Guangde County, Yuexi County and She County, the actual erodibility factor K values were obtained to evaluate the effectiveness of each method. [Results]The soil erodibility K values in Huoshan County, Guangde County, Yuexi County and She County were 0.033～0.035, 0.018, 0.021 and 0.041(t·hm²·h)/(hm²·MJ·mm), respectively. The differences in soil erodibility K values derived from different methods were significant, with all methods greatly overestimating the K values. The overall ranking of the methods in terms of soil erodibility followed the order:K_Torri>K_Nomo>K_M-Nomo>K_DG>K_Epic. The methods of calculating K values for each were improved, in which the improved Nomo equation and the modified Nomo equation showed superior performance. [Conclusion]The improved Nomo equation and modified Nomo equation are recommended to apply in the key soil loss areas of Anhui Province.

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Last Update: 2024-08-10