镇江市潜在淹没区不透水面数据集(2005）

镇江市2005年潜在淹没区不透水面数据集。该数据基于该地区警戒水位，利用SRTM DEM数据，在面状数字高程模型上提取镇江市等于及小于警戒水位线的空间范围。同时，结合长江干流水系分布数据，排除小于警戒水位范围内的不连通区域，利用流域范围，得到镇江市潜在淹没区范围。在镇江市潜在淹没范围基础上，利用长江流域土地利用现状遥感监测数据2005年数据，提取镇江市区域属于不透水面的范围。提取土地利用数据中心城镇建设用地、农村居民地与其他建设用地范围作为不透水面。

Dataset of Impervious Surfaces within Potential Flooded Areas of Zhenjiang City, 2005
This dataset is developed based on the local warning water level of Zhenjiang City. Firstly, SRTM DEM data is used to extract the spatial extents of areas equal to or below the warning water level from the planar digital elevation model of the region. Then, combined with the distribution data of the Yangtze River main stem water system, disconnected areas within the initially extracted scope below the warning water level are excluded, and the watershed boundaries are applied to refine the potential flooded area extents of Zhenjiang City. Based on the finalized potential flooded area extents, the impervious surface extents within Zhenjiang City are extracted using the 2005 remote sensing monitoring data of land use status in the Yangtze River Basin. Specifically, the impervious surfaces are defined as the areas of urban construction land, rural residential areas and other construction lands, which are extracted from the aforementioned land use dataset.