摘要
当前水质评价需要更为精细的分类方法为水环境治理工作奠定基础。水质标识指数法及单因子评价法分类模糊,难以评价劣于V类及归属于同一类别的水体的实际情况。针对上述问题,改进综合水质标识指数法,利用插值思想建立分段函数,调整污染指数范围,细化水质分类,并将其应用于研究浑太流域中下游地区多年水质变化趋势中。结果表明:对比单因子及综合水质标识指数法,改进的综合水质标识指数法计算简单、实用性强,便于量化水质;由改进后的方法可知,2015年—2019年小姐庙水质优于于家房水质且变化趋势更为稳定,三岔河向好趋势明显;单因子水质标识指数法筛选出流域主要污染指标为COD_(Mn)、BOD_(5)、COD、TP及NH_(3)-N。改进后的综合水质标识指数法与单因子水质标识指数法的联合应用,可以更好地进行水质变化趋势研究及污染指标筛选,对水生态环境治理有一定的参考价值。
At present,water quality evaluation needs more detailed classification methods to lay the foundation for water environment treatment. The classification of water quality identification index method and single factor evaluation method is not clear,so it is difficult to evaluate the actual situation of water bodies inferior to class V and belonging to the same category. In view of the above problems,the comprehensive water quality identification index method is improved,and the subsection function is established by using the interpolation idea,the pollution index range is adjusted,the water quality classification is refined,and it is applied to study the multi-year water quality change trend in the middle and lower reaches of Huntai River. The results show that compared with single factor and comprehensive water quality identification index method,the improved comprehensive water quality identification index method has the advantages of simple calculation,strong practicability and easy to quantify water quality. According to the improved method,from 2015 to 2019,the water quality of Xiaojiemiao is better than that of Yujiafang,and the change trend is more stable,and the good trend of Sanchahe is obvious. The single factor water quality identification index method screened the main pollution indicators of the basin as COD_(Mn),BOD_(5),COD,TP and NH_(3)-N. The combined application of the improved comprehensive water quality representation index method and single factor water quality representation index method can better analyze the change trend of water quality and screen pollution indicators,which has a certain reference value for water ecological environment treatment.
作者
田晶
刘建卫
陈小强
TIAN Jing;LIU Jianwei;CHEN Xiaoqiang(Institute of Water Enironment of Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《水利与建筑工程学报》
2022年第1期78-84,共7页
Journal of Water Resources and Architectural Engineering
基金
国家重点研发计划(2019YFC1407700
2016YFC0400903)
国家自然科学基金(51679026)。
关键词
改进的综合水质标识指数法
最近邻法
水质评价
水质变化趋势
污染指标
improved comprehensive pollution index method
nearest neighbor method
water quality assessment
water quality change trend
pollution index
