本文采用HEC-RAS 软件，建立了以常州运河以北三山港流域和北塘河流

In this paper, HEC-RAS software, established a Sanshan harbor basin and north of Canal by the North River basin river network model. , The WPI and principal component analysis of the study area was evaluated by single factor quality evaluation method, the identification of water environment pollution factors. Select a large proportion of pollutants NH 3-N, TP two pollutants, using the output of pollution load coefficient estimating River Basin and North Harbor three mountain basin. Design hydrological conditions, a matrix calculation in response to the relationship between the factors and pollution load control section for each of the different contamination by the sewage outfall HEC-RAS model, the hypothesis of linear optimization analysis and scenario planning system combination, each the maximum allowed for the study area pollution factor dirt holding capacity calculation and allocation, ultimately to provide different amounts of each outfall emissions scheme.

本文采用HEC-RAS 软件，建立了以常州运河以北三山港流域和北塘河流域河网模型。通过单因子评价法、WPI法和主成分分析法对研究区域进行水质评价，识别水环境主要污染因子。选取污染物中所占比重较大的NH 3-N、TP两个污染因子，运用输出系数法估算北塘河流域和三山港流域污染负荷。基于设计水文条件，通过HEC-RAS模型计算不同排污口各污染因子污染负荷与控制断面之间的响应关系矩阵，将线性规划系统优化分析和情景假设相结合，对研究区域内各污染因子最大允许纳污量进行计算和分配，最终提供不同排污口各污染物量排放方案。

In this paper, HEC-RAS software is used to establish the river network model of Sanshan harbor basin and Beitang river basin to the north of Changzhou canal. Through single factor evaluation, WPI and principal component analysis, the water quality of the study area was evaluated to identify the main pollution factors of water environment. The output coefficient method was used to estimate the pollution load of Beitang River Basin and Sanshan Port basin. Based on the design hydrological conditions, the response matrix between the pollution load of each pollution factor and the control section is calculated by HEC-RAS model, and the linear programming system optimization analysis and scenario hypothesis are combined to calculate and distribute the maximum allowable pollutant capacity of each pollution factor in the study area, and finally provide the emission scheme of each pollutant capacity of different sewage outlets.<br>