摘要
针对皖北平原城市河网径流小、流速缓导致的水环境容量问题,以皖北某平原城市为例,通过建立该地区的水质水动力模型分析皖北河网的污染物质扩散规律,结合零维模型对河网水环境容量进行了核算,提出了河网水环境优化技术方案.研究显示,通过引水改善城区水环境的措施影响较小,引水流量每增加1.0m3/s,COD、氨氮和总磷的改善效果仅提高1.5％、3.0％和2.5％;在实施源头减排措施后,水体中COD、氨氮、总磷质量浓度下降幅度均达到50％以上.
Abstract
To address the issue of water environment capacity impacted by low runoff and sluggish flow rates in urban river networks within the northern Anhui Plain region,a water quality hydrodynamic model was developed using a city in northern Anhui as a case study.This model analyzed the spread of pollutants in the river network and,in conjunction with a zero-dimensional model,calculated the water environment capacity of the network.Based on the findings,a technical strategy was devised to optimize the water environment of the river network.The research revealed that water diversion measures have a limited impact on enhancing the urban water environ-ment.For every 1 m3/s increase in diversion flow rate,the improvement effect on COD,ammonia nitrogen,and total phosphorus in the river only saw marginal increases of 1.5％,3％,and 2.5％,respectively.Conversely,implementing source emission reduction measures led to significant improvements,with COD,ammonia nitrogen,and total phosphorus levels decreasing by over 50％.
维普
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