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信阳地区地表水水质及污染成因分析

发表时间:2011-01-31  浏览量:1766  下载量:554
全部作者: 董杰英,陈启慧
作者单位: 河海大学水文水资源学院;河海大学水文水资源与水利工程科学国家重点实验室
摘 要: 利用信阳西部地区2005年专题测图仪(thematic mapper,TM)影像,2001年至2007年地表水水质及排污口监测资料,运用ArcGIS软件和水土评估工具(soil and water assessment tool,SWAT)模型,采用综合指数法、等标污染分析法等方法对地表水环境及污染成因进行评价和分析。结果显示:研究区域内2001年至2007年综合污染指数先减小后增大,主要超标指标为氨氮、五日生化需氧量和总磷(total phosphorus, TP)。点源污染逐年减轻,造纸、化肥业为主要污染行业。农田施肥的氮、磷流失逐渐成为水质污染的主要原因。琵琶山站、平桥站主要受点源污染影响,地表水污染非常严重;长台关站、南湾站、石山口站只受面源污染影响,水质较好;明港站、息县站受点源、面源污染综合影响,水质达重污染程度。
关 键 词: 水文水资源;地表水污染;综合指数法;等标污染负荷法;信阳
Title: Surface water evaluation and main contaminants analysis in Xinyang
Author: DONG Jieying, CHEN Qihui
Organization: College of Water Resources and Hydraulic Engineering, Hohai University; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University
Abstract: This paper aims at evaluating the surface water and analyzing the main contamination in Xinyang. Based on the remote sensing image in 2005 and surface water quality dataset from 2001 to 2007, the evaluation and analysis was made by using ArcGIS, soil and water assessment tool (SWAT) model and other methods such as comprehensive index method and equivalent pollution analysis method. The results showed that the comprehensive pollution index decreased first and then increased by comparatively big change rates from 2001 to 2007. The main indexes exceeding standards were NH3-N, BOD5 and TP. Point source pollution was alleviated during the five years while paper, fertilizer industries were the major polluting industries. N, P loss from farmland fertilizer is becoming the main reason for water pollution. Surface water of Pipashan, Pingqiao sites was seriously polluted by point source contaminants; Changtaiguan, Nanwan, Shishankou sites were only affected by non-point source pollution, whose water quality was comparatively good; Minggang and Xixian sites were affected synthetically by point and non-point source pollution. The surface water there had reached heavily polluted degree.
Key words: hydrology and water resources; surface water pollution; comprehensive index method; equivalent pollution load method; Xinyang
发表期数: 2011年1月第2期
引用格式: 董杰英,陈启慧. 信阳地区地表水水质及污染成因分析[J]. 中国科技论文在线精品论文,2011,4(2):94-100.
 
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