水电站工程建设对河道泥沙含量变化的影响——以金安桥水电站为例  

River Way Sedimeutin Hydropower Station Construction——A Case Study of Jin'an Qiao Hydropower Station

作　　者：柳小强[1] 陈奇伯[1] 王克勤[1] 余德恒[1] 雷俊杰 

机构地区：[1]西南林业大学,云南昆明650224 [2]金安桥水电站有限公司,云南丽江674100

出　　处：《西北林学院学报》2011年第1期190-194,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金(31060093);云南省应用基础研究计划面上项目(20070065M);西南林业大学生态学重点建设学科(XKX200902)

摘　　要：由于水电工程建设的特殊性,导致弃土弃渣直接进入河道现象比较严重,致使施工区及以下河道泥沙含量发生显著变化,严重影响库区使用寿命和河道行洪安全。本文运用比重法对金安桥水电站工程建设过程中受影响河道的泥沙含量进行测定,以分析其动态变化特征及控制措施。结果显示:(1)施工初期和末期的工程开挖对河道泥沙含量的贡献率较大,分别是多年平均值的3.99倍和4.55倍;(2)年内河道上下游断面泥沙含量变化也较大,2005～2008工程区上下游河道断面泥沙含量变化差异性较大,下游泥沙含量分别比上游高出-1.99%、24.58%、27.19%和375.51%。During the construction of hydropower station, the waste soil and residue were directly abandoned in the river way, and altered the sediment amounts in the construction areas and downstream rivers. Taking Jin＇anqiao hydropower station as example, we analyzed the change dynamic of sediment in the disturbed river through the hydrometer method. The results are following.. （1） the sediment amount changed greatly in different construction stages. In the early and late construction stages, the sediments were 3.99 and 4.55 times more than the average value of many years respectively; （2） the upstream and downstream sediments varied with rainfall and construction progress, in 2005, the downstream sediment was 1.99% lower than the upstream sediment, however, from 2006 to 2008, the downstream sediment were 24.58%, 27.19%, and 375.51% greater than the upstream sediment, respectively.

关 键 词：工程建设 水电站 河道 泥沙含量 

分 类 号：X322[环境科学与工程—环境工程] S157.1[农业科学—土壤学]