武汉城区湖泊水质时空差异及其与污染源的空间关联分析  

Analysis of Spatial and Temporal Differences of Lake Water Quality and Its Spatial Correlation with Pollution Sources in Wuhan City

作　　者：霍雯蓉 许峰[1] 王文荟 尹述政 黄运新[1] HUO Wenrong;XU Feng;WANG Wenhui;YIN Shuzheng;HUANG Yunxin(Faculty of Resources and Environment,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学资源环境学院,湖北武汉430062

出　　处：《安全与环境工程》2022年第2期132-140,共9页Safety and Environmental Engineering

基　　金：国家自然科学基金面上项目(31670543)。

摘　　要：为了解武汉市重点湖泊水质状况及其与污染源的空间关联性,通过对武汉城区6个重点湖泊水质进行采样调查,运用遥感解译提取各湖泊周边的土地利用类型,并利用排污系数法和SCS模型计算了不同污染源的污染负荷,分析了武汉城区湖泊水质的时空差异及其与土地利用类型和污染源的空间关联性。结果表明:武汉城区湖泊水质指标总磷(TP)、化学需氧量(COD_(Cr))、高锰酸盐指数(COD_(Mn))含量在春、秋两季间存在显著差异,其中春季湖泊水质较秋季好,春、秋两季湖泊水质指标氨氮(NH_(3)-N)和COD_(Cr)含量以及秋季湖泊水质指标总氮(TN)和COD_(Mn)含量在武汉主城区与近城区之间存在显著差异;不同污染源对武汉城区湖泊水质污染的贡献大小依次为城市地表径流>水产养殖>畜禽养殖>农业种植;湖泊中TN和NH_(3)-N含量与建设用地面积占比的相关系数分别为0.731和0.816,湖泊中COD_(Cr)含量与植被用地面积占比的相关系数为-0.658,显示武汉城区湖泊水质与周边建设用地和植被用地具有高度的相关性,表明武汉主城区与近城区之间的环境差异可对城市湖泊水质产生显著的影响。In order to understand the water quality status of important lakes in Wuhan and its spatial correlation with pollution sources,this paper surveys the water quality in six key lakes of Wuhan city,extracts land use types around lakes by remote sensing interpretation,calculates the pollution load of different pollution sources through the pollutant discharge coefficient method and the SCS model,and analyzes the temporal and spatial differences of water quality in Wuhan city and its spatial correlation with land use types and pollution sources.The results show that the lake water quality indicators of total phosphorus(TP),chemical oxygen demand(COD_(Cr)),and permanganate index(COD_(Mn))content in Wuhan city are significantly different between spring and fall.The water quality in spring is better than that in fall.The contents of ammonia nitrogen(NH_(3)-N)and COD_(Cr) in the two seasons and the contents of total nitrogen(TN)and COD_(Mn) lake water quality index in fall are significantly different between the main urban and the nearby suburban area of Wuhan.The order of contribution to water pollution among different pollution sources is:urban runoff>aquaculture>livestock and poultry breeding>agriculture planting.The correlation coefficients between the water quality indexes and proportion of construction land for contents of TN and NH;-N are 0.731 and 0.816,respectively.The correlation coefficient between contents of COD_(Cr) and the proportion of vegetation land is -0.658,showing that the lake water quality is highly correlated with surrounding construction land and vegetation land.The results demonstrate that the environmental differences between the main urban area and the nearby urban area can have a significant impact on the water quality of lakes in Wuhan city.

关 键 词：湖泊水质 时空差异 污染源 土地利用类型 空间关联性 武汉城区 

分 类 号：X524[环境科学与工程—环境工程]