摘要
为探究长三角高度城镇化地区河网水系生态调控方案,以秦淮河流域下游地区水系为例,采用生态功能设定法,计算了各河段生态水位和生态流量。通过构建一维水量水质模型,在枯水年非汛期水量调控及截污措施协同驱动下,对水位、流量及污染物浓度的时空分布特征进行多情景数值模拟,并对生态水量保障率及水质改善效果进行评估。结果表明,水位调控措施对水质改善作用非常有限,无法保障河道生态基流需求;引水措施的调控效果较为明显,但水质改善率增幅随引水流量增加而下降;截污措施的水质改善效果优于水量调控方案,但存在显著的空间异质性,且无法提高生态基流保障率;将截污措施与引水措施结合,是满足城市水系生态水量及水质要求的最佳选择。
In order to explore the ecological regulation scheme of river network and water system in highly urbanized areas of the Yangtze River Delta, taking the water system in the lower reaches of Qinhuai River Basin as an example, the ecological water level and ecological flow of each reach were calculated by using the ecological function setting method. By constructing a one-dimensional water quantity and quality model, driven by the coordinated control of water quantity and pollution interception measures in non-flood season of dry years, the temporal and spatial distribution characteristics of water level, flow and pollutant concentration were simulated, and the ecological water quantity guarantee rate and water quality improvement effect were evaluated. The results show that the water level regulation measures have very limited effect on water quality improvement, and cannot guarantee the demand of river ecological base flow. The regulation effect of diversion measures is obvious, but the increase of water quality improvement rate decreases with the increase of diversion flow. The water quality improvement effect of pollution interception measures is better than that of water regulation scheme, but there is significant spatial heterogeneity and cannot improve the guarantee rate of ecological base flow. Combining pollution interception measures with water diversion measures is the best choice to meet the requirements of ecological water quantity and water quality of urban water system.
作者
王鹏
华祖林
褚克坚
董越洋
WANG Peng;HUA Zulin;CHU Kejian;DONG Yueyang(Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China;Yangtze Institute for Conservation and Development,Hohai University,Nanjing 210098,China)
出处
《水资源保护》
CAS
CSCD
北大核心
2022年第1期205-212,共8页
Water Resources Protection
基金
国家自然科学基金联合基金(U2040209)
国家自然科学基金重点项目(51739002)
中央高校基本科研业务费专项(B210204001)
江苏省高校优秀科技创新团队(水环境模拟与生态修复)。
关键词
高度城镇化
生态需水量
生态水位
多目标调控
水量水质模型
秦淮河流域
high urbanization
ecological water demand
ecological water level
multi-objective regulation
water quantity and quality model
Qinhuai River Basin
