Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region
[Objective] The erosion-deposition process of loess slopes under the effects of various influencing factors was studied in order to provide a scientific basis for the rational layout of soil and water conservation measures, and for planning to control and prevent soil and water loss in the loess hil...
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Science Press
2022-04-01
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| Series: | Shuitu baochi tongbao |
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| Online Access: | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220205 |
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| author | Liu Ran Yu Xinxiao Cai Qiangguo Sun Liying Fang Haiyan Jia Guodong He Jijun |
| author_facet | Liu Ran Yu Xinxiao Cai Qiangguo Sun Liying Fang Haiyan Jia Guodong He Jijun |
| author_sort | Liu Ran |
| collection | DOAJ |
| description | [Objective] The erosion-deposition process of loess slopes under the effects of various influencing factors was studied in order to provide a scientific basis for the rational layout of soil and water conservation measures, and for planning to control and prevent soil and water loss in the loess hilly and gully region of Northern Shaanxi Province. [Methods] The characteristics of erosion-deposition processes on a loess slope under different slope gradients, slope lengths, and 60 mm/h rainfall intensity were studied using an indoor artificial rainfall simulation experiment. [Results] ①The net erosion process mainly occurred before and after reaching the peak value of erosion rate. The erosion rates alternated between positive and negative values during the entire rainfall period, and the erosion process coexisted with the deposition process. ② When the slope was 5°, 10°, and 15°, the erosion per unit area decreased with increasing slope length. There was an obvious deposition process and critical erosion slope length in the 5—10 m slope section. Under the test conditions, the critical slope length of loess slope deposition was in the range of 4—5 m and 5—10 m. ③ Under the gradient of 5° and 15°, during the entire rainfall process, the cumulative erosion per unit area of the 0—5 m slope section was greater than erosion of the 0—10 m slope section, and there was always deposition in the erosion process. On the 10° slope, deposition began to occur about 15 minutes after rainfall. [Conclusion] Slope gradient and slope length are important factors affecting erosion-deposition processes of a loess slope. The sediment concentration of slope runoff and erosion per unit area can be used as important factors to characterize the erosion-deposition characteristics of a loess slope. To control soil and water loss on a slope, soil and water conservation measures that intercept runoff at the middle and upper slope positions should be adopted. |
| format | Article |
| id | doaj-art-600b2a2ba7d343cf95a5a06aa5c2c078 |
| institution | DOAJ |
| issn | 1000-288X |
| language | zho |
| publishDate | 2022-04-01 |
| publisher | Science Press |
| record_format | Article |
| series | Shuitu baochi tongbao |
| spelling | doaj-art-600b2a2ba7d343cf95a5a06aa5c2c0782025-08-20T02:51:12ZzhoScience PressShuitu baochi tongbao1000-288X2022-04-01422313710.13961/j.cnki.stbctb.2022.02.0051000-288X(2022)02-0031-07Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully RegionLiu Ran0Yu Xinxiao1Cai Qiangguo2Sun Liying3Fang Haiyan4Jia Guodong5He Jijun6School of Soil Water Conservation in Beijing Forestry University, Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing 100083, ChinaSchool of Soil Water Conservation in Beijing Forestry University, Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing 100083, ChinaInstitute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Water Cycle and Related Land Surface Processes, Beijing 100101, ChinaInstitute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Water Cycle and Related Land Surface Processes, Beijing 100101, ChinaInstitute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Key Laboratory of Water Cycle and Related Land Surface Processes, Beijing 100101, ChinaSchool of Soil Water Conservation in Beijing Forestry University, Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing 100083, ChinaState Key Laboratory of Urban Environmental Processes and Numerical Simulation, Resources Environment and GIS Key Lab of Beijing, Capital Normal University, Beijing 100048, China[Objective] The erosion-deposition process of loess slopes under the effects of various influencing factors was studied in order to provide a scientific basis for the rational layout of soil and water conservation measures, and for planning to control and prevent soil and water loss in the loess hilly and gully region of Northern Shaanxi Province. [Methods] The characteristics of erosion-deposition processes on a loess slope under different slope gradients, slope lengths, and 60 mm/h rainfall intensity were studied using an indoor artificial rainfall simulation experiment. [Results] ①The net erosion process mainly occurred before and after reaching the peak value of erosion rate. The erosion rates alternated between positive and negative values during the entire rainfall period, and the erosion process coexisted with the deposition process. ② When the slope was 5°, 10°, and 15°, the erosion per unit area decreased with increasing slope length. There was an obvious deposition process and critical erosion slope length in the 5—10 m slope section. Under the test conditions, the critical slope length of loess slope deposition was in the range of 4—5 m and 5—10 m. ③ Under the gradient of 5° and 15°, during the entire rainfall process, the cumulative erosion per unit area of the 0—5 m slope section was greater than erosion of the 0—10 m slope section, and there was always deposition in the erosion process. On the 10° slope, deposition began to occur about 15 minutes after rainfall. [Conclusion] Slope gradient and slope length are important factors affecting erosion-deposition processes of a loess slope. The sediment concentration of slope runoff and erosion per unit area can be used as important factors to characterize the erosion-deposition characteristics of a loess slope. To control soil and water loss on a slope, soil and water conservation measures that intercept runoff at the middle and upper slope positions should be adopted.http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220205artificial rainfall simulationslope erosiondeposition processcritical slope lengthnorthern shaanxi provinceloess hilly and gully region |
| spellingShingle | Liu Ran Yu Xinxiao Cai Qiangguo Sun Liying Fang Haiyan Jia Guodong He Jijun Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region Shuitu baochi tongbao artificial rainfall simulation slope erosion deposition process critical slope length northern shaanxi province loess hilly and gully region |
| title | Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region |
| title_full | Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region |
| title_fullStr | Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region |
| title_full_unstemmed | Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region |
| title_short | Soil Erosion and Deposition Processes of Loess Slopes in Loess Hilly and Gully Region |
| title_sort | soil erosion and deposition processes of loess slopes in loess hilly and gully region |
| topic | artificial rainfall simulation slope erosion deposition process critical slope length northern shaanxi province loess hilly and gully region |
| url | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220205 |
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