基于遥感的巢湖悬浮泥沙分布的环境背景分析  

Environment Background Analysis of Suspended Sediment in Lake Chaohu based on Remote Sensing

作　　者：梅长青[1] 王心源[2] 李文达[1] 

机构地区：[1]安徽师范大学环境科学学院,安徽芜湖241000 [2]中国科学院-教育部-国家文物局遥感考古联合实验室安徽遥感考古工作站

出　　处：《环境科学研究》2008年第3期87-91,共5页Research of Environmental Sciences

基　　金：国家自然科学基金项目(40571162);安徽省自然科学基金项目(050450401)

摘　　要：悬浮泥沙是重要的水质参数之一,对水体透明度、浑浊度、水色等光学性质及水生生态条件产生直接影响,水体的含沙量及其动态变化对区域水下地貌的发展及冲淤变化等具有非常重要的影响.以巢湖为例,通过对不同含沙量的水体进行光谱特征分析,提出了用泥沙指数来提取泥沙分布的方法.利用ETM+(TM)数据得到了巢湖湖区2个时相的泥沙分布图,并对巢湖悬浮泥沙分布的环境背景进行分析,指出巢湖泥沙的来源主要是各入湖河流携带的泥沙,其次是岸坡崩塌物形成的.Suspended sediment is one of most important parameters for water quality in a lake. Its concentration directly influences water transparency, turbidness, optical quality （e. g., water color）, and aquatic ecological condition. Its dynamic change also largely influences the local development of the underwater landforms and the fluctuation of the silt. Lake Chaohu was used as the experimental plot, applying the relative atmospheric adjustment method to analyze the spectrum characteristic of this district＇ s different density rank of sand waters. ETM＋ （TM） data were analyzed and the suspended sediment distribution maps of two phases obtained for the lake area. The environmental background for suspended sediment distribution in Lake Chaohu was also analyzed. The results show that the sources of the sediment in Lake Chaohu are primarily the sediments carried by the entry rivers and secondarily the slides of bank slopes.

关 键 词：悬浮泥沙 泥沙指数 巢湖 环境背景分析 

分 类 号：X524[环境科学与工程—环境工程]