李家河水库水质评价综合指数系统的研究

Study on comprehensive index system for water quality evaluation of Lijia river reservoir

为了更科学准确的评价水源水质,本文依据GB3838-2002《地表水环境质量标准》,根据李家河水库的实际情况,选择七个重要评价水质指标:总氮、氨氮、总磷、高锰酸盐系数、总铁、总锰和溶解氧,以单项指标与其标准值相比较作为基本单元的多元综合水质指数系统的研究方法,研制出一套适用于水库水质分类、分级的综合指数系统;该系统包括评价依据、综合指数的计算以及评价结果的水质含义和报告方法等;利用该评价指数系统对2021年李家河水库水质情况进行系统的评价和评估,全年均为2类水质。该文的研究成果对于中小型水库水质的综合评价具有重要的借鉴和推广意义。

In order to evaluate the water quality of water sources more scientifically and accurately,according to GB3838-2002"environmental quality standard for surface water"and the actual situation of Lijia riverreservoir,this paper selects seven important water quality indexes:Total nitrogen,ammonia nitrogen,total phosphorus,permanganate coefficient,total iron,total manganese and dissolved oxygen,and develops a set of research methods of multivariate comprehensive water quality index system which is suitable for reservoir water quality classification,comparison of individual indexes with their standard values as basic units.The system includes evaluation basis,calculation of comprehensive index,water quality meaning of evaluation results and reporting method,etc.The water quality of Lijia riverreservoir in 2021 was systematically evaluated and evaluated by the evaluation index system,and the water quality in the whole year was grade two.The research results of this paper have important reference and popularization significance for comprehensive evaluation of water quality of small and medium-sized reservoirs.