基于Delft3D的苏州市渭塘镇河道水动力水质模拟  

Simulation of hydrodynamics and water quality for Weitang Town river network in Suzhou based on Delft3D

作　　者：张炜 胡乐[2] 钱启蒙 刘钰 ZHANG Wei;HU Le;QIAN Qimeng;LIU Yu(Hohai University Design Institute Co.,Ltd.,Nanjing 210098,China;Jiangsu Rural Water Conservancy Science and Technology Development Center,Nanjing 210029,China;Rural Work Bureau of Weitang Town in Jiangsu Suzhou Xiangcheng District,Suzhou 215134,China)

机构地区：[1]河海大学设计研究院有限公司,江苏南京210098 [2]江苏省农村水利科技发展中心,江苏南京210029 [3]江苏省苏州市相城区渭塘镇农村工作局,江苏苏州215134

出　　处：《水利水电科技进展》2023年第6期96-102,119,共8页Advances in Science and Technology of Water Resources

摘　　要：为探究苏州市渭塘镇平原河道水质提升的可行方案,基于Delft3D构建了该镇区河道的水动力水质耦合模型,采用Delft3D-FLOW模块对镇区河道2021年10月的水动力时空特征进行模拟,确定了镇区活水泵站与活水推流器的流量;采用Delft3D-WAQ模块,以CODMn、NH3-N、TP为主要评价指标,论证了旁路净化设施规模的合理性。结果表明:模型水动力模拟结果较为理想,活水效果好;确定老镇片1号活水泵站流量为1.0 m^(3)/s,确定珍珠湖片每组活水推流器感应流量为0.4 m^(3)/s;水质模拟结果较为理想,镇区河道水体通过规模为2万m^(3)/d的旁路净化设施处理后,水质能达到GB 3838—2002《地表水环境质量标准》的Ⅳ类水标准,水质提升效果明显。In order to explore a feasible scheme for improving the water quality of a plain river network in Weitang Town of Suzhou,a hydrodynamic and water quality coupling model of the river network was constructed based on Delft3D.Using Delft3D-FLOW,the spatiotemporal characteristics of the hydrodynamics in the river channels of the town during October of 2021 were simulated,and the discharges of the water pump stations and water thrusters were demonstrated.Using the Delft3D-WAQ module and tanking COD Mn,NH 3-N,and TP as the main evaluation indicators,the rationality of the scale of bypass purification facilities was demonstrated.The simulation results show that the hydrodynamic results of the model are relatively ideal and the live water effect is good.The discharge of the No.1 Pump Station in the Laozhen section is determined to be 1.0 m 3/s,and the in duced discharge of the live water thrusters in the Pearl Lake section is 0.4 m 3/s in each group.The water quality simulation results are relatively ideal.After being treated with Pearl Lake and Diamond Bypass purification facilities with a scale of 20000 m 3/d,the water quality of the rivers in the town can reach to Level IV of the Environmental Quality Standard for Surface Water(GB 3838—2002),with significant improvement effect.

关 键 词：Delft3D 水动力 水质 耦合模型 水生态修复 净化设施 

分 类 号：TV131.2[水利工程—水力学及河流动力学]