水体的面积监测是调查水资源的一个重要方面，也是洪水灾害监测的重要内容。基于卫星遥感影像，进行快速、准确的提取水体面积信息已经成为水资源调查、监测的重要手段。本文通过环境减灾A、B星得到的鄱阳湖湖区卫星影像，采用手工数字化进行分类，提取水体信息，并与1998年实测面积按水位进行比较分析，实现湖区水体面积的快速监测。%The water area monitoring is an important aspect of water resources investigations, also is the important content of flood disaster monitoring. Through satellite remote sensing image, quickly and accurately drawing the information of water area has become the important means of water resources investigation and monitoring. Based on the satellite images of Poyang lake region through the A, B star of environmental disaster reduction, the paper uses the manual digitization to sort, extracts water information, compares with the actual area in 1998 in accordance with the water level, and realizes fast monitoring for lake water area.
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