浑太河流域水质达标控制方法研究

结合浑太河流域水资源网络节点图,根据污染物来源、种类及其产生机理,针对计算单元水资源供需平衡预测数据、降雨径流值,分点源、非点源进行规划水平年污染物入河量的预测。根据浑太河流域地形特征、入河污染物降解特性,以水功能区水体纳污能力为计算单元污染物排放总量控制条件,给出基于规划水平年入河污染物变动特性的水质达标控制方法。运用该方法进行浑太河流域水质达标控制:2030年,流域总需水7.4亿立方米,缺水深度在1%以下,COD、NH3-N、TP、TN的入河量分别为28.5×104、2.8×104、3.1×104、4.6×104t,对应的入河控制量分别为9.3×104、0.6×104、0.8×104、0.9×104t,经控制后水功能区目标水质达标率100%。证实了该水质达标控制方法有效、可行。

Method Study of Water Quality Subjective Control in Hun-Tai River Basin

According to the pollutant origin, category and generating mechanism, the paper gives the calculation method of pollutants discharged into Hun-Tai River from point and non-point source aspects. With water resources network-node graph, calculating element water supply and demand balance data and rainfall-runoff, related amount of pollution has been forecasted in the future year (year 2020, 2030). By comprehensively consideration the watershed landform and pollutants degradation characteristic, the paper puts forward implementation process of water quality control objective based on the allowable permitted assimilative capacity of water bodies, the control amount of pollutants discharged into river. In the year 2030, the total water demand in Hun-Tai River basin is 740 million m³, water shortage ratio is less than 1%, the control amount discharged into river of chemical oxygen demand(COD), ammoniacal nitrogen(NH₃-N), total phosphorus (TP) and total nitrogen(TN) is 93, 6, 8 and 9 thousand ton respective. Applying the above method, under the condition that COD, NH₃-N, TP and TN discharged into river is 285, 28, 31 and 46 thousand ton, the realization rate of water quality control objective is 100%. Therefore, water quality control method for the polluted river is valid and feasible.