南水北调西线一期工程大渡河流域减水段生态水文浅析  

PRELIMINARY ECO-HYDROLOGICAL ANALYSIS IN THE DADUHE RIVER TRANSFER AREA IN THE FIRST STAGE OF WEST LINE OF THE SOUTH-NORTH WATER TRANSFER PROJECT

作　　者：王秀英[1] 白音包力皋[1] 王东胜[1,2] 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]国家水电发展研究中心,北京100038

出　　处：《长江流域资源与环境》2011年第6期749-754,共6页Resources and Environment in the Yangtze Basin

基　　金：国家自然科学基金资助项目(50809077);国家"十一五"科技支撑计划重大项目(2006BAB04A08)

摘　　要：南水北调西线一期工程调水前河流生态水文特征、调水对生态影响的研究对于进一步探讨有利于生态保护的水利工程调控措施具有重要意义。采用IHA方法分析大渡河流域调水区河流调水前的水文资料,提取对基本生态条件维护具有重要意义的月基流量作为特征流量,采用Tennant法评价基流量对生态的有利程度,以历史上曾经发生过的特征流量对生态的意义作为参照,对比分析一期调水工程实施后水文站月平均流量对生态的有利程度,间接推求坝址下游近坝段特征基流量,探究调水后月均流量对生态的有利程度。结果表明:随着沿程流量的恢复,绰斯甲站、足木足站河道水量得到恢复,调水后月平均流量对生态有利程度能达到较好状态;坝址下游河段调水后月平均流量的生态有利程度汛期较差,珠安达和霍那坝址下游6月份甚至为"极差"水平。It is important to further explore the nature features before the South-North Water Transfer Project and hydraulic control measures on ecology protection after the project.This paper used IHA method to analyze the discharge data in Daduhe River transfer area before project,then took the monthly low flows as the characteristic flows,which was important to maintain the basic ecological river system,and used Tennant method to assess them.With taking the characteristic flow as a reference,the paper concerned the advantage to the ecosystem of the monthly average flows post-project in the stations reaches.It also calculated indirectly the monthly low flows downstream the dams and discussed the advantage to the ecosystem of monthly average flows in the dams reaches.The results show that with the restoration of flow along the way,the discharge in Chuosijia station and Zumuzu station had been restored so that the monthly mean discharge was better to the river ecology after the fist stage water transfer project.While,the monthly mean discharge downstream the dams were too low to support the normal river ecology.The river ecological conditions in the downstream of the Zhu＇anda dam and the Huona dam were＂very poor＂under the situation of the monthly mean discharge in June after the project.

关 键 词：大渡河 生态水文情势 南水北调 西线一期 

分 类 号：TV746[水利工程—水利水电工程]