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Appl. Sci. 2016, 6(2), 34; doi:10.3390/app6020034

A Physically—Based Geometry Model for Transport Distance Estimation of Rainfall-Eroded Soil Sediment

1
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
2
State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection, Chengdu University of Technology, Chengdu 610059, China
3
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
4
Ning Xia Academy of Building Research Company Limited, No.201 East Road, Huaiyuan, Yinchuan 750021, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Serafim Kalliadasis
Received: 28 October 2015 / Revised: 14 January 2016 / Accepted: 19 January 2016 / Published: 25 January 2016
View Full-Text   |   Download PDF [6377 KB, uploaded 25 January 2016]   |  

Abstract

Estimations of rainfall-induced soil erosion are mostly derived from the weight of sediment measured in natural runoff. The transport distance of eroded soil is important for evaluating landscape evolution but is difficult to estimate, mainly because it cannot be linked directly to the eroded sediment weight. The volume of eroded soil is easier to calculate visually using popular imaging tools, which can aid in estimating the transport distance of eroded soil through geometry relationships. In this study, we present a straightforward geometry model to predict the maximum sediment transport distance incurred by rainfall events of various intensity and duration. In order to verify our geometry prediction model, a series of experiments are reported in the form of a sediment volume. The results show that cumulative rainfall has a linear relationship with the total volume of eroded soil. The geometry model can accurately estimate the maximum transport distance of eroded soil by cumulative rainfall, with a low root-mean-square error (4.7–4.8) and a strong linear correlation (0.74–0.86). View Full-Text
Keywords: soil erosion; cumulative rainfall; sediment yield volume; transport distance; physical experiment soil erosion; cumulative rainfall; sediment yield volume; transport distance; physical experiment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Zhang, Q.-G.; Huang, R.-Q.; Liu, Y.-X.; Su, X.-P.; Li, G.-Q.; Nie, W. A Physically—Based Geometry Model for Transport Distance Estimation of Rainfall-Eroded Soil Sediment. Appl. Sci. 2016, 6, 34.

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