洞庭湖流域潜在淹没区不透水面数据集(2000）

洞庭湖流域2000年潜在淹没区不透水面数据集。该数据基于城陵矶水文站警戒水位，利用SRTM DEM数据，在面状数字高程模型上提取洞庭湖流域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，得到洞庭湖流域潜在淹没区范围。在洞庭湖流域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2000年数据，提取洞庭湖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。

Impervious Surface Dataset of Potential Flooded Areas in the Dongting Lake Basin (2000). This dataset is developed using SRTM DEM data and the warning water level of the Chenglingji Hydrological Station. Specifically, the spatial extent within the Dongting Lake Basin that is equal to or lower than the warning water level line is extracted from the gridded digital elevation model. Then, combined with the distribution data of the main stream water system of the Yangtze River, disconnected regions within the extracted area are removed, and the final potential flooded zone extent of the Dongting Lake Basin is determined based on the basin boundary. Subsequently, based on the confirmed potential flooded zone extent, the impervious surface area within the Dongting Lake region is extracted using the 2000 remote sensing monitoring data of current land use status in the Yangtze River Basin. The impervious surfaces are defined as the areas of urban construction land, rural residential areas and other construction lands included in the land use dataset.