基于综合水质标识指数法的农村环境监测孝义河水质评价

Evaluation of Xiaoyi River Water Quality in Rural Environmental Monitoring Based on the Comprehensive Water Quality Identification Index Method

农村生态环境保护是实现乡村振兴不可缺少的一环,农村环境质量监测是评价农村生态环境质量状况的前提条件。以保定农村环境监测中孝义河段监测为例,作为白洋淀上游最重要的入淀河流,科学合理评价孝义河水质,对掌握其水质变化规律有着重要意义。选取孝义河段2020-2023年6个监测断面4个主要水质指标COD_(Cr)、NH_(3)-N、TP、COD_(Mn),采用综合水质标识指数法对该河段水环境状况进行评价。结果表明:孝义河各断面的综合水质类别均达到或优于功能区的目标要求。但对单项污染指标进行评价时发现,下游思乡桥断面主要存在的污染指标因子为COD_(Mn)和COD_(Cr)。从评价结果来看,综合水质标识指数法能更准确直观地反映孝义河不同区域、不同时段的水质特征及差异。研究结果可为该流域水污染防治提供理论依据,为保定市农村区域生态环境保护工作提供数据支持。

Rural ecological environment protection is an indispensable part of achieving rural revitalization,and rural environmental quality monitoring is a prerequisite for evaluating the quality of rural ecological environment.As the most important inflow river in the upstream of Baiyangdian,the water quality of the Xiaoyi River is scientifically and reasonably evaluated,which is of great significance for grasping its water quality change patterns.Taking the monitoring of the Xiaoyi River section in rural environmental monitoring in Baoding as an example,6 monitoring sections and 4 main water quality indicators COD_(Cr),NH_(3)-N,TP and COD_(Mn)from the Xiaoyi River section from 2020 to 2023 are selected,and the comprehensive water quality identification index method is used to evaluate the water environment status of this section.The results show that the comprehensive water quality categories of each section of the Xiaoyi River meet or exceed the target requirements of the functional area.However,when evaluating individual pollution indicators,it was found that the main pollution indicator factors in the downstream Sixiang Bridge section are COD_(Mn)and COD_(Cr).From the evaluation results,it can be seen that the comprehensive water quality identification index method can more accurately and intuitively reflect the water quality characteristics and differences in different regions and periods of the Xiaoyi River.The research results can provide theoretical basis for the prevention and control of water pollution in the watershed,and provide data support for the ecological environment protection work in rural areas of Baoding City.