基于多元统计法的农村河道水环境污染特征研究

Study on Pollution Characteristics of Rural Natural Water Environment Based on Multivariate Statistical Method

农村河道水环境污染源是水环境的基本单元,也是目前水环境保护和管理的重点。本文采用改进的内梅罗综合污染指数法和多元统计方法,综合分析了两条农村河道的水质及底泥的污染情况。研究区域内的水质主要污染因子为化学需氧量、总磷和高锰酸盐指数,底泥受到有机氮污染水平较为严重,且底泥环境中总磷、有机质和全氮呈正相关性,充分说明研究所在的区域受到农业面源污染的影响较大。

Rural natural water pollution source is the basic unit of water environment. It is the focus of water environment protection and management at present. This paper adopts the Improved Nemerow Index Method and Multivariate Statistical Method to analyze the water quality and sediment pol-lution for two rural rivers. The main pollution factors of water quality in the study area are chemical oxygen demand, total phosphorus and permanganate index. The sediment is seriously polluted by organic nitrogen and a positive correlation of the total phosphorus, organic matter and total nitrogen. It indicated that the study area is greatly affected by agricultural non-point source pollu-tion.