水利学报2017，Vol.48Issue(12)：1429-1437,9.DOI:10.13243/j.cnki.slxb.20170576
平原河网区水系连通改善水环境效果评估
Evaluation of water environment improvement by interconnected river network in plain area
摘要
Abstract
River water system is an important resource and environmental carrier of the city.The contradiction between urban development and water environment protection is becoming more and more prominent in recent years,especially in the plain river network area.Due to geographical constraints,the improvement of urban river water environment is challenging.The sustainable development of urban water system will be directly related to the healthy development of cities and the whole society.Therefore implement modern water system management theory and promote water environment improvement through the interconnected river system has become an important step of urban water management.In this paper,the urban area of Changshu city is selected as the research area.The water transfer experiment and the hydraulic model are applied as technical support to formulate river interconnected schemes for the sake of water environment enhancement.Based on the concept of structural connectivity and functional connectivity,the river network connectivity assessment method is proposed.In the water transfer experiment,flow exchange in major rivers is satisfied and water quality of indexes is increased 20％-30％ in average.Yet the river connectivity in the central downtown is limited which leads to less flow access.The improvement of river channel connectivity and the reasonable dispatching of water conservancy project have important influence on the connectivity system.Taking the scenario simulations in the paper as an example,channel regulation projects increase river connectivity and give rise to water quality about 30％-50％.The change of connectivity index also prove that structural connectivity greatly enhances water transfer efficiency,and promotes better flow distribution and water environment.The establishing methodology of interconnected water system to improve water environment can provide theoretical basis for water system connectivity decision,and provide reference for urban water system connectivity in China.关键词
水系连通/常熟城区/水环境改善/引水实验Key words
interconnected water system/Changshu city/water environment improvement/water transfer experiment分类
资源环境引用本文复制引用
崔广柏,陈星,向龙,张其成,许钦..平原河网区水系连通改善水环境效果评估[J].水利学报,2017,48(12):1429-1437,9.基金项目
“十三五”国家重点研发计划课题(2016YFA0601504) （2016YFA0601504）
国家自然科学基金(51579148,51779146) （51579148,51779146）
中央本级项目(SHZH-IWHR-73) （SHZH-IWHR-73）
