遥感与GIS在河流水质环境背景分析中的应用——以台湾基隆河为例

为了研究河流水质受到流域环境背景和人类活动的影响 ,运用 TM影像和 SPOT影像 ,在地图资料、统计资料以及实测资料的基础上 ,结合遥感和 GIS技术 ,对基隆河水质及其与环境背景和城市污染的关系做了分析 .根据遥感影像灰度值与水体反射率和水中悬浮固体含量之间的相关关系 ,运用 SPOT影像和实测数据将基隆河悬浮固体含量分为 4级 .并进行了基于 GIS专题信息的基隆河流域环境遥感制图 ,通过水体悬浮固体浓度等级与环境背景、排污口的比较 ,通过计算各等级水体与各种环境背景相邻的边界长度 ,得出基隆河悬浮固体含量主要受环境背景和城市排污的影响 .

Application of Remote Sensing and GIS in Environment Background of Water Quality Analysis--A Case Study in Jilong River,Taiwan

In order to indicate the effect of the environmental background of a drainage basin and human activity on the river's water quality,TM and SPOT images,thematic maps,statistic data and in field measured data were used to analyze the relationship of Jilong River water quality with its environmental background and urban pollution.According to the relations between the reflectivity of water and its suspended sediment concentration,band 1 and 2 of SPOT image were used to classify the concentration of suspended sediment into 4 grades on base of the in field measured data.The environmental background of Jilong River basin were acquired by environmental remote sensing mapping with TM and SPOT images and thematic information based on GIS.Compareing the water quality with the environmental background of the basin and the location of limber holes,it can be concluded that its environmental background and urban sewage affect the water quality of Jilong River.