Impacts of different rainfall locations on sediment erosion

被引：0

作者：

Shi, Zhi-Nan ^{[1
]}

Ran, Qi-Hua ^{[1
]}

Wu, Xiu-Shan ^{[1
]}

Chen, Hui-Jun ^{[2
]}

机构：

[1] Department of Hydraulic Engineering, Zhejiang University, Hangzhou

[2] China international water and electric Corporation, Beijing

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2014年 / 48卷 / 08期

关键词：

Process curve; Rainfall intensity; Rainfall location; Sediment concentration; Soil erosion;

D O I：

10.3785/j.issn.1008-973X.2014.08.003

中图分类号：

学科分类号：

摘要：

Pl-ot-scale laboratory experiments were conducted to study the impacts of different rainfall locations, as well as the related rainfall properties, on the hillslope soil erosion process. Three scenarios with different rainfall location were considered. The results showed that: peak discharge of both sediment and runoff decreased significantly as the rainfall getting farther from the outlet, and the erosion amount kept decreasing for the successive experiments. Both the largest value and the maximum decrease, between successive experiments, of peak sediment discharge occurred when rainfall is 2 m away from the outlet. Total sediment discharge was heavily influenced by rainfall intensity, while rainfall location played an important role when the intensity was weak. For the first experiment during each successive run, sediment concentration decreased as the rainfall getting farther from the outlet. Content of sand in the eroded material was significantly lower than the original soil composition on slope. On the whole, sediment concentration process curve in experiments of 3 m rainfall location reached stable state earlier than other scenarios, and resulted in the minimum standard deviation for the gradation of eroded material.

引用

页码：1362 / 1369

页数：7

共 19 条

[1]

Gilbert E., Planning agricultural research: A sourcebook , Agricultural Economics, 28, 1, pp. 76-78, (2003)

[2]

Melville N., Morgan R.P.C., The influence of grass density on effectiveness of contour grass strips for control of soil erosion on low angle slopes , Soil Use and Management, 17, 4, pp. 278-281, (2001)

[3]

Defersha M.B., Quraishi S., Melesse A., Et al., The effect of slope steepness and antecedent moisture content on interrill erosion, runoff and sediment size distribution in the highlands of Ethiopia , Hydrology and Earth System Sciences, 15, 7, pp. 2367-2375, (2011)

[4]

Nearing M.A., Lane L.J., Alberts E.E., Et al., Prediction technology for soil-erosion by water-status and research needs , Soil Science Society of America Journal, 54, 6, pp. 1702-1711, (1990)

[5]

Ellison W.D., Soil erosion by rainstorms , Science, 111, 2880, pp. 245-249, (1950)

[6]

Olson T.C., Wiscilmeier W.H., Soil credibility evaluations for soils on the Blnofand erosion stations, Soil Science, 27, pp. 590-592, (1963)

[7]

Wishmeier W.H., Smith D.D., Predicing rainfall erosion losses from cropland east of the Rocky Mountains , Washington: Agriculture Handbook, (1965)

[8]

Wishmeier W.H., Smith D.D., Predicing rainfall erosion losses: a guide to conservation planning , Agriculture Handbook, 537, (1978)

[9]

Seo Y., Schmidt A.R., The effect of rainstorm movement on urban drainage network runoff hydrographs , Hydrological Processes, 26, 25, pp. 3830-3841, (2012)

[10]

Ran Q.-H., Shi Z.-N., Fu X.-D., Et al., Impact of rainfall movement on soil crust development , International Journal of Sediment Research, 27, 4, pp. 439-450, (2012)

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