ZHANG Jiaming, ZUO Hongpeng, SHAO Xiaoquan, et al. Soil Erosion Characteristics of Dumping Sites Under Simulated Rainfall Conditions in Three Gorges Reservoir Region[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 7-11.
ZHANG Jiaming, ZUO Hongpeng, SHAO Xiaoquan, et al. Soil Erosion Characteristics of Dumping Sites Under Simulated Rainfall Conditions in Three Gorges Reservoir Region[J]. Bulletin of Soiland Water Conservation, 2015, 35(5): 7-11. DOI: 10.13961/j.cnki.stbctb.2015.05.067.
[Objective] The objective of this study is to reveal the soil erosion characteristics of dumping sites in Three Gorges reservoir region in order to provide basis for the management in this area.[Methods] Runoff plots were constructed and simulated artificial rainfall was used in this research.[Results] A significant linear relationship was found between rainfall and erosion amount. The rainfall intensity showed a significant power function correlation with the runoff time
while it showed an exponential regression correlation with the sand content. Fine gravel with high concentration in the dumping sites surface soil reduced the splash and sheet erosions in some extent
however
it intensified the gully erosion under the condition of heavy or continuous rainfall. Furthermore
soil erosion in the dumping sites presented seasonal variations. During the dry season
soil erosion was dominated by sheet erosion and slight gully erosion
and the erosion amount was little. In contrast
in wet season
shallow grooves were converted into ditches rapidly
and the erosion became more severe.[Conclusion] As soil erosion in dumping sites of Three Gorges reservoir region changes seasonally
constructions can be done according to the changes of season to avoid the rainy season. Taking the protective measures to prevent or slow down the development of gully erosion in the rainy season is the focus of soil and water conservation in the study area.
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references
Xu Xibao,Yan Tan,Yang Guishan, et al. Soil Erosion in the Three Gorges Reservoir Area[J]. Soil Research, 2011(49):212-222.