Analysis of Sediment-retaining Function of "7.26" Storm of Silt Dam in Xiaoli River Basin

The construction of silt dams on the loess plateau is one of the highlights of water conservancy construction. Because silt dams can effectively prevent soil erosion, silt dams have been built on a large scale in the loess plateau. But what is the function and effect of silt dam in the process of ra...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2019-07, Vol.295 (4), p.42131
Main Authors: Li, Li, Jian, Shi Xue, Shan, Yang Ji, Li, Ma
Format: Article
Language:English
Subjects:
Construction
Dam construction
Dams
Loess
Rainstorms
River basins
Rivers
Sediments
Silt
Soil erosion
Water conservation
Watersheds
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Summary:The construction of silt dams on the loess plateau is one of the highlights of water conservancy construction. Because silt dams can effectively prevent soil erosion, silt dams have been built on a large scale in the loess plateau. But what is the function and effect of silt dam in the process of rainstorm? It is a scientific question to be answered urgently. Therefore, we selected six hundred and forty-six silt dams in Xiaoli river basin under "7.26" rainstorm to carry out field survey and measure the silt and sediment situation of silt dams, so as to explore the silt retaining capacity of silt dams in small watersheds and the main factors affecting silt and sediment of silt dams during rainstorm. The results show that the small and medium-sized dams in the Xiaoli river basin have a strong ability to retain sediment in rainstorm, but the large and medium-sized dams play a major role in retaining sediment. The average modulus of retaining sediment in the basin is 12587t/km2.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/295/4/042131