东河流域成县城区段拦沙坝建设与效果

Construction of Silt-Trap Dams across the Main Stream of the East River through Cheng County Downtown and the Performance Review

文章在分析东河流域成县城区段现状的基础上,阐述由于修建拦水坝等景观工程给成县县城造成潜在的洪灾威胁,提出通过修建上游拦沙坝解决东河县城段的泥沙淤积问题。在上游修建拦沙坝要完成主河道清淤,确定坝址、坝基和基础高程,设计坝高、坝身和库容等,在两道拦沙坝建成的十年时间里,避免了泥沙在城区段的淤积,对成县防洪、防汛起到关键作用,同时也发现第一道拦沙坝在十年后出现破损、第二道拦沙上游河道淤积较为严重,建议修复第一道拦沙坝,并对两道拦沙坝内的河道进行清淤。

Based on the analysis of the present situation of the main stream of the East River through Cheng County Downtown,the potential flood threat to Cheng County caused by the construction of dams and other landscape projects is expounded in this paper.The solution to the problem of sediment deposition in the county section of Donghe River by building upstream sand bar are proposed.In the upstream construction of sand dam.to complete the main river dredging,determine the dam site,dam foundation and foundation elevation,it needs to complete the main river dredging,determine the dam site,dam foundation and foundation elevation,design dam height,dam body and storage capacity and complete other work.In the ten years since the construction of the two dams,the sediment deposition in the urban section has been avoided,which plays a key role in flood control and flood control in Cheng County.At the same time,it was found that the first barrier dam was damaged after ten years and the upstream channel of the second barrier dam was more serious.It was suggested to repair the first barrier dam and clear silt in the river channel of the two barriers.