南水北调西线工程建坝取水对坝下沼泽湿地水文影响初步研究  

Preliminary study on impact from dam construction water diversions of Western Route of South-to-North Water Transfer Project on downstream wetland hydrology

作　　者：赵志轩[1,2] 严登华[2] 翁白莎[1,2] 王凌河[3] 张彪[4] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]中国水利水电科学研究院水资源研究所,北京100038 [3]大连理工大学土木水利学院,辽宁大连116023 [4]河北工程大学城市建设学院,河北邯郸056038

出　　处：《水利水电技术》2011年第4期1-5,共5页Water Resources and Hydropower Engineering

基　　金："十一五"国家科技支撑重大项目课题<西线工程对调水区生态环境影响评估及综合调控技术>(2006BAB04A08)

摘　　要：根据南水北调西线工程建坝取水后坝下径流量及水位变化情况,确定了坝下减水河段范围。在GIS、RS支持下,分为雅砻江、大渡河两个流域生成了工程重点影响区域,利用1985年、2000年、2005年3期LandsatTM影像分别提取出区内沼泽湿地景观。根据湿地景观的动态演变过程,将其划分为活动区、变动区和稳定区3部分。最后以活动区内沼泽湿地为研究对象,根据其与减水河段的关系,分层次设置了以下3种情境。结果表明,按照黄河水利委员会提供的调水方案,建坝取水对坝下游沼泽湿地的水文情势基本没有影响。In accordance with the downstream runoffs and water levels to be changed after the construction of dams and water di- versions of the Western Route of the South-to-North Water Transfer Project, the ranges of the river sections downstream of the dams with the flow rates to he decreased are determined. Based on GIS and RS, the main areas to be impacted by the project within the river basins of both Yalongjiang River and Daduhe River are generated, and then the marsh wetland landscapes in the areas are extracted from the Landsat TM images of three phases, i.e. 1985, 2000, 2005. On the basis of the dynamic evolve- ments of the landscapes, the areas are plotted into three parts, i. e. active zone, changing zone, stable zone. Finally, taking the marsh wetlands in the active zones as the study cases, three circumstances are hierarchically made with the relationships between the river sections with flow rates to be decreased. The result shows that there basically no any impacts from the dam constructions and water diversions are upon the hydrological regimes of their downstream mash wetlands in the light of the water diversion scheme programmed by the Yellow River Engineering Consulting Co. , Ltd.

关 键 词：南水北调西线工程 沼泽湿地 湿地水文 坝址下游 

分 类 号：P462.5[天文地球—大气科学及气象学]