Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope
Rainfall events coupled with shallow and gravelly sloping farmland have led to serious soil erosion and associated problems in the Three Gorges reservoir. Previous studies have shown that the use of vegetation is an effective way to control soil erosion. Therefore, an artificial, simulated rainfall...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/7043428 |
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| author | Bingqin Zhao Lun Zhang Zhenyao Xia Wennian Xu Lu Xia Yongzhe Liang Dong Xia |
| author_facet | Bingqin Zhao Lun Zhang Zhenyao Xia Wennian Xu Lu Xia Yongzhe Liang Dong Xia |
| author_sort | Bingqin Zhao |
| collection | DOAJ |
| description | Rainfall events coupled with shallow and gravelly sloping farmland have led to serious soil erosion and associated problems in the Three Gorges reservoir. Previous studies have shown that the use of vegetation is an effective way to control soil erosion. Therefore, an artificial, simulated rainfall experiment study is conducted to determine the effect of rainfall intensity and vegetation cover on runoff volume, sediment load, and runoff hydraulics characteristics. The experiment consists of seven vegetation treatments subjected to three rainfall intensities on a soil that contains rock fragments on a slope of 30°. The results indicate that the runoff volume and sediment load of the bare plot were greater than those of vegetation-covered plots under three different rainfall intensities. When Cynodon dactylon and Indigofera amblyantha were applied together, the plot displayed the best performance for soil loss control, with a reduction of 87.88%–99.11%. According to a redundancy analysis, the change in rainfall intensity had the least impact on the Reynolds number and the runoff volume of the herb-shrub mixed plot in this study. These findings suggest that the effect of combining Cynodon dactylon and Indigofera amblyantha and increasing the vegetation coverage is an effective solution for soil and water loss conservation. The application of this method can alleviate environmental stress on the Three Gorges reservoir. |
| format | Article |
| id | doaj-art-cfc64e323c384bc9a4016615b0c7dbf9 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-cfc64e323c384bc9a4016615b0c7dbf92025-02-03T07:25:24ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/70434287043428Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments SlopeBingqin Zhao0Lun Zhang1Zhenyao Xia2Wennian Xu3Lu Xia4Yongzhe Liang5Dong Xia6College of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaCollege of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaCollege of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaCollege of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaCollege of Civil Engineering & Architecture, China Three Gorges University, Yichang, Hubei 443002, ChinaChina Power Construction Guiyang Engineering Corporation Limited, Guiyang, Guizhou 550081, ChinaCollaboration Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area, China Three Gorges University, Yichang, Hubei 443002, ChinaRainfall events coupled with shallow and gravelly sloping farmland have led to serious soil erosion and associated problems in the Three Gorges reservoir. Previous studies have shown that the use of vegetation is an effective way to control soil erosion. Therefore, an artificial, simulated rainfall experiment study is conducted to determine the effect of rainfall intensity and vegetation cover on runoff volume, sediment load, and runoff hydraulics characteristics. The experiment consists of seven vegetation treatments subjected to three rainfall intensities on a soil that contains rock fragments on a slope of 30°. The results indicate that the runoff volume and sediment load of the bare plot were greater than those of vegetation-covered plots under three different rainfall intensities. When Cynodon dactylon and Indigofera amblyantha were applied together, the plot displayed the best performance for soil loss control, with a reduction of 87.88%–99.11%. According to a redundancy analysis, the change in rainfall intensity had the least impact on the Reynolds number and the runoff volume of the herb-shrub mixed plot in this study. These findings suggest that the effect of combining Cynodon dactylon and Indigofera amblyantha and increasing the vegetation coverage is an effective solution for soil and water loss conservation. The application of this method can alleviate environmental stress on the Three Gorges reservoir.http://dx.doi.org/10.1155/2019/7043428 |
| spellingShingle | Bingqin Zhao Lun Zhang Zhenyao Xia Wennian Xu Lu Xia Yongzhe Liang Dong Xia Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope Advances in Civil Engineering |
| title | Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope |
| title_full | Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope |
| title_fullStr | Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope |
| title_full_unstemmed | Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope |
| title_short | Effects of Rainfall Intensity and Vegetation Cover on Erosion Characteristics of a Soil Containing Rock Fragments Slope |
| title_sort | effects of rainfall intensity and vegetation cover on erosion characteristics of a soil containing rock fragments slope |
| url | http://dx.doi.org/10.1155/2019/7043428 |
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