中文摘要：

运用1：5万DEM地形数据对鄱阳湖区洪涝灾害风险区区域范围及空间分布进行了分析。在此基础上，以乡镇为基本研究单元，选取乡村人口比重、耕地面积比重为洪灾风险暴露分析指标，选取单位面积生产总值、农民人均纯收入、第一产业从业人员比重、农业收入占农村经济总收入比重等为农户洪灾应对能力分析指标．并引入了不同洪水水位特征值的影响系数，对鄱阳湖区农户洪灾脆弱性程度进行了定量研究。结果表明，鄱阳湖洪灾风险区面积广、影响深，农户对洪涝灾害总体上存在着较高的脆弱性：在所涉及的180个乡镇中。农户脆弱度高于平均值的有100个，占到乡镇数55．56％。脆弱度最高的乡镇主要集中在滨湖地带及五河干流沿岸地区，而脆弱度较低的乡镇则主要分布在湖区各县城关镇所在区域。

英文摘要：

This paper examines quantitatively farmers＇ vulnerability to flood in the Poyang Lake Region （PLR） using GIS technique. The spatial unit for this analysis is township. The analysis consists of three major steps. First, the spatial extent and characteristics of flood risk areas were determined using a digital elevation model （DEM） derived from a 1：50,000 topographic map. Second, for each of the township values of six indices reflecting the economic activities of local farmers were computed. These indices are： percentage of rural population, percentage of farmland, GDP per acreage, percentage of employment in the .first industry, net income per farmer and percentage of agricultural income. The values of these six indices were then normalized and used for vulnerability assessment. Third, the normalized indices （as GIS data layers） were overlaid with the flood risk areas to obtain the risk coefficient of each township and to calculate the overall vulnerability of each township. The analysis results show that there are large-scale flood risk areas which have a great impact on livelihood of the farmers in the PLR. 55.56% of 180 townships among flood risk areas have a high degree of vulnerability to flood. These townships stand at the lakefront around the Poyang Lake and the alongshore zones at the ‘Five Rivers＇.