北京市西郊地下水污染特征

Study on Groundwater Pollution Characteristics in the Western Suburban of Beijing

本文在综合分析北京市西郊地下水化学特征及历史土地利用状况的基础上,运用piper三线图和箱形图等技术方法,从地下水水化学表现的差异性角度对北京市西郊地下水污染特征进行了研究,通过对比污染源分布特征进行了西郊污染特征分区。研究结果显示,依据北京市西郊地区地下水化学的差异性可划分为基本无污染区、历史工业污染区、历史城市居民生活污染区和历史农业污染区4个区,其中基本无污染区主要分布在山前地区,地下水质总体较好,工业污染区主要分布在历史的首钢老工业区及下游的污灌区,其主要影响因子为SO_4^(2-)和Cl^-;城市污染区主要分布在二环内,其主要影响因子为NO_3^-、Cl^-、SO_4^(2-);农业污染区主要分布在东南部历史上的污水和清水的混合灌区,其主要影响因子为NO_3^-。

Based on the comprehensive analysis of the western suburbs of Beijing Groundwater chemical characteristics and historical land use, using piper-III charts and box plots and other technical methods, studied groundwater pollution characteristics in the western suburbs of Beijing from the perspective of the difference between the performance of the groundwater chemistry. The results show that the western suburbs of Beijing can be divided into pollution-free zone, historical industrial pollution, polluted urban living history and the history of agriculture polluted area ,based on groundwater chemistry differences. Pollution-free zone are mainly distributed in the Piedmont region, and groundwater quality is generally good .historical industrial pollution mainly in the history of SHOUGANG old industrial areas and downstream, and main impact factor are SO42-and Cl-, polluted urban living history are mainly in the Second Ring, and main impact factor are NO3-, Cl- and SO42-, the history of agriculture polluted area are mainly in the southeastern part of the history of the sewage and mixed irrigation area,and the main impact factor is NO3-.