平原河网区闸控河段入河排污口水环境影响分析及优化调度方案研究

受闸控影响,平原河网地区闸控河段水体流向不定,入河排污口排水不仅会对下游水体产生影响,也会一定程度地影响闸前乃至上游关联水体的水质。为此,选取苏南地区张家港市走马塘上某新建入河排污口为例,利用一维河网水量水质模型分别模拟拟建入河排污口尾水排放在张家港枢纽立交地涵现状运行工况和优化控制工况下对上游河网地区保护目标的水环境影响。通过对比各种方案计算结果,从避免对保护目标影响的角度出发提出了优化调度方案,为决策部门提供了技术指导。

Study on Environmental Impact Analysis and Optimal Operation Scheme of Sewage Outfall in Gate Controlled Reach of Plain River Network Area

Under the influence of gate control,the flow direction of water body in the gate controlled reach of plain river network area is uncertain.The discharge from the discharge outlet into the river will not only affect the downstream water body,but also affect the water quality of the associated water body in front of the gate and even in the upstream to a certain extent.This paper selected a new sewage outlet as research object,which is in Zhangjiagang City,Southern Jiangsu Province and located on River Zoumatang.One-dimensional river network water quantity and quality model was used to simulate the water environment impact on the protection target of the upstream river network area under the current operation condition and optimal control condition of the proposed outlet tail water discharge in Zhangjiagang junction overpass culvert.By comparing the calculation results of various schemes,optimal scheduling scheme was proposed based on the point of view of avoiding the impact on the protection target,which provided technical guidance for decision-making departments.