基于污染损失模型的阅海湿地水体污染的环境功能影响研究

Influences of Water Pollution on Environment Function of Yuehai Wetland Based on Pollution Loss Model

随着工业化和城市化的推进,亟待加强湖泊湿地水体污染的环境功能损害治理和防控。基于污染损失模型,以1997—2006年阅海湿地水质监测的原始数据为数据源,通过计算阅海湿地污染损失率动态变化规律,详细分析了其环境功能受影响的程度。由于阅海湿地主要水源为农田退水,总磷、总氮和BOD5成为最主要的污染物,而高锰酸盐指数始终是农业灌溉功能损害的主要因素。从综合污染损失率计算结果看,阅海湿地渔业、居住和农业灌溉功能污染损失率年际变化总体平稳,而饮用水源和游泳功能污染损失率年际变化总体剧烈。

With the advancement of industrialization and urbanization, it is urgent to reinforce the management and prevention as well as control of damage to water environment function on lake wetlands. The article establishes the monomial and comprehensive loss rates by water pollution based on the calculation model and the original monitoring data from 1997 to 2006, through calculating the dynamic diversification of pollution loss rate of Yuehai wetland and analyzing its degree of environment function damage. Because the main source of Yuehai wetland is the withdrawn agricultural water, the total P, the total N, and BOD5 become the main pollutant. The index of permanganate is always the main factor of function damage of agricultural irrigation. From calculated result of the comprehensive loss rate, annual pollution loss rate in fishery, habitation, and agricultural irrigation functions on Yuehai wetland are generally steady. However, for drinking water and swimming functions, annual pollution loss rate varies severely on the whole.