Modified Numerical Method for Improving the Calculation of Rill Detachment Rate
A rational calculation of the rill detachment rate (RDR) and an accurate simulation of the rill detachment process are important for determining the model parameters of hillslope erosion. Here, we found a difference between RDRs calculated using different methods that cannot be ignored. This study p...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/10/1875 |
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| author | Yuhan Huang Mingquan Zhao Dan Wan Tingwu Lei Fahu Li Wei Wang |
| author_facet | Yuhan Huang Mingquan Zhao Dan Wan Tingwu Lei Fahu Li Wei Wang |
| author_sort | Yuhan Huang |
| collection | DOAJ |
| description | A rational calculation of the rill detachment rate (RDR) and an accurate simulation of the rill detachment process are important for determining the model parameters of hillslope erosion. Here, we found a difference between RDRs calculated using different methods that cannot be ignored. This study proposes a modified numerical method based on the dataset of the measured sediment concentrations along the rill length over a saturated loess soil slope to improve the calculation of RDR. For the saturated loess soil slope, the modified numerical RDR reduced the relative error from 58.3% to 4.6%, thereby demonstrating the efficiency of the modified numerical method. Furthermore, datasets of previous studies on different soil types and rill width verified the accuracy and applicability of the modified numerical method. A measurement strategy with more sampling points set at the forepart of the rill is proposed to enhance the calculation accuracy of RDR in accordance with the absolute error distribution between numerical and modified numerical RDRs. This study contributes to the literature by correcting previous data, improving data for subsequent measurements, and supplying a basis for the accurate estimation of RDR for rill erosion modeling. |
| first_indexed | 2024-03-11T03:13:32Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T03:13:32Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
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| series | Water |
| spelling | doaj.art-7d50d7ade63e4f9c9276d308597f09912023-11-18T03:41:42ZengMDPI AGWater2073-44412023-05-011510187510.3390/w15101875Modified Numerical Method for Improving the Calculation of Rill Detachment RateYuhan Huang0Mingquan Zhao1Dan Wan2Tingwu Lei3Fahu Li4Wei Wang5Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, ChinaGuangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, ChinaCollege of Resources and Environment, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, ChinaCollege of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, ChinaCollege of Engineering, China Agricultural University, Beijing 100083, ChinaA rational calculation of the rill detachment rate (RDR) and an accurate simulation of the rill detachment process are important for determining the model parameters of hillslope erosion. Here, we found a difference between RDRs calculated using different methods that cannot be ignored. This study proposes a modified numerical method based on the dataset of the measured sediment concentrations along the rill length over a saturated loess soil slope to improve the calculation of RDR. For the saturated loess soil slope, the modified numerical RDR reduced the relative error from 58.3% to 4.6%, thereby demonstrating the efficiency of the modified numerical method. Furthermore, datasets of previous studies on different soil types and rill width verified the accuracy and applicability of the modified numerical method. A measurement strategy with more sampling points set at the forepart of the rill is proposed to enhance the calculation accuracy of RDR in accordance with the absolute error distribution between numerical and modified numerical RDRs. This study contributes to the literature by correcting previous data, improving data for subsequent measurements, and supplying a basis for the accurate estimation of RDR for rill erosion modeling.https://www.mdpi.com/2073-4441/15/10/1875detachment raterill erosionWEPP modelmodifyingrill length |
| spellingShingle | Yuhan Huang Mingquan Zhao Dan Wan Tingwu Lei Fahu Li Wei Wang Modified Numerical Method for Improving the Calculation of Rill Detachment Rate Water detachment rate rill erosion WEPP model modifying rill length |
| title | Modified Numerical Method for Improving the Calculation of Rill Detachment Rate |
| title_full | Modified Numerical Method for Improving the Calculation of Rill Detachment Rate |
| title_fullStr | Modified Numerical Method for Improving the Calculation of Rill Detachment Rate |
| title_full_unstemmed | Modified Numerical Method for Improving the Calculation of Rill Detachment Rate |
| title_short | Modified Numerical Method for Improving the Calculation of Rill Detachment Rate |
| title_sort | modified numerical method for improving the calculation of rill detachment rate |
| topic | detachment rate rill erosion WEPP model modifying rill length |
| url | https://www.mdpi.com/2073-4441/15/10/1875 |
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