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The Scientific World Journal
Volume 2013 (2013), Article ID 367918, 7 pages
http://dx.doi.org/10.1155/2013/367918
Research Article

Transport Model of Underground Sediment in Soils

1School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China
2State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

Received 23 June 2013; Accepted 2 September 2013

Academic Editors: S. Kaewunruen and H. C. Wu

Copyright © 2013 Sun Jichao and Wang Guangqian. 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.

Abstract

Studies about sediment erosion were mainly concentrated on the river channel sediment, the terrestrial sediment, and the underground sediment. The transport process of underground sediment is studied in the paper. The concept of the flush potential sediment is founded. The transport equation with stable saturated seepage is set up, and the relations between the flush potential sediment and water sediment are discussed. Flushing of underground sediment begins with small particles, and large particles will be taken away later. The pore ratio of the soil increases gradually. The flow ultimately becomes direct water seepage, and the sediment concentration at the same position in the water decreases over time. The concentration of maximal flushing potential sediment decreases along the path. The underground sediment flushing model reflects the flushing mechanism of underground sediment.