摘要
调水引流、生态补水已成为改善河流水质常采用的手段,但调水引流后水质改善程度仍需要科学量化以对补水方案作出科学决策。以重庆市长寿区桃花溪为研究对象,基于MIKE11构建桃花溪河流水文、水动力、水质耦合模型,模拟桃花溪水质演变规律。在此基础上计算不同补水方案下河流COD、NH3-N、TP浓度的削减情况,定量分析生态补水对山地城市河流水环境的改善效果。通过模型计算得出:桃花溪平均补水量为0.38 m^(3)/s时,对水质改善效果均值为15.4%;平均补水量为0.96 m^(3)/s时,对水质改善效果均值为29.4%。通过数值模拟计算手段,科学量化山地城市河流生态补水效果,以期为山地城市河流水环境改善指引新方向。
Water diversion and ecological water replenishment have become common means to improve river water quality to improve water quality.But the degree of the improved water quality after water diversion still needs to be scientifically quantified to make scientific decisions on water replenishment schemes.Taking Taohua river in Changshou,Chongqing as the research object,a coupled hydrology-hydrodynamics-water quality model was established based on MIKE11 to simulate water quality evolution in Taohua river.On this basis,the concentration reduction of COD,NH3-N and TP in the river under different water replenishment schemes was calculated and the improvement effect of ecological water replenishment on river water environment in mountainous cities was quantitatively analyzed.The results show that the average water quality improvement effect is 15.4%under the average water replenishment of 0.38 m^(3)/s,and 29.4%under that of 0.96 m^(3)/s.By means of numerical simulation,the ecological water replenishment effect of river channels in mountain cities is scientifically quantified,in order to guide a new direction for the improvement of river water environment in mountain cities.
作者
杨海瑞
马念
陈杰
张志敏
杨俊豪
YANG Hairui;MA Nian;CHEN Jie;ZHANG Zhimin;YANG Junhao(T.Y.Lin International Engineering Consulting(China)Co.,Ltd.,Chongqing 400715,P.R.China)
出处
《重庆大学学报》
CAS
CSCD
北大核心
2022年第S01期89-95,共7页
Journal of Chongqing University
关键词
山地城市河流
水环境
生态补水
生态修复
耦合模型
rivers in mountain cities
water environment
ecological water supplement
ecological restoration
coupled model
