[1]MA Li,ZHANG Qiufen,NI Yongxin,et al.Study on Siltation Depth in Warping Dam Under Different Silting Conditions in Chabagou Watershed[J].Research of Soil and Water Conservation,2022,29(02):18-22+30.
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Study on Siltation Depth in Warping Dam Under Different Silting Conditions in Chabagou Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
18-22+30
Column:
Public date:
2022-03-20
- Title:
- Study on Siltation Depth in Warping Dam Under Different Silting Conditions in Chabagou Watershed
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- In order to further clarify the silt retention effect of warping dam under the condition of rainstorm, this study used the sediment deposition information of warping dam under different deposition states in Chabagou Basin to study the relationship between the deposition depth in warping dam under different deposition states by combining with the methods of linear regression and correlation analysis. The results show that:(1)the maximum and average siltation depth in warping dams under different siltation conditions decrease in the order: blocking dam(1.07 m, 0.62 m)>waterlogging dam(0.72 m, 0.53 m)>intact dam(0.70 m, 0.45 m)>full dam(0.19 m, 0.15 m);(2)there is no obvious correlation between the siltation depth and rainfall intensity under different siltation conditions; the siltation depth and B value(the ratio of dam field to dam-controlled watershed area)of blocking dam and waterlogging dam have an exponential negative correlation, and the correlation indexes are 0.73 and 0.71, respectively;(3)warping dam average moduli of intercepting sediment under different silting conditions decreased in the order: blocking dam(14 274 t/km2)>intact dam(12 480 t/km2)>waterlogging dam(11 725 t/km2)>full dam(3 350 t/km2). To sum up, under the condition of rainstorm, the blocking dam has the function of high-efficiency sediment retention, but the dam with small storage capacity is prone to produce a greater depth of sedimentation, which threatens the dam. The reasonable allocation of blocking dam and intact dam is the key to efficient flood detention and sediment retention.
- References:
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Last Update:
2022-04-20