九江市潜在淹没区数据集(2020）

九江市2020年潜在淹没区数据集。该数据基于九江水文站警戒水位，利用SRTM DEM数据，在面状数字高程模型上提取九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，得到九江市潜在淹没区范围。

2020 Potential Submerged Area Dataset of Jiujiang City. This dataset is developed based on the warning water level recorded at the Jiujiang Hydrological Station. Leveraging SRTM DEM data, the spatial extent within Jiujiang City where the terrain elevation is equal to or lower than the warning water level is extracted from the areal digital elevation model. Additionally, combined with the distribution data of the Yangtze River mainstream water system, disconnected areas within the elevation range below the warning water level are excluded, and the watershed boundary is utilized to derive the final potential submerged area extent of Jiujiang City.

搜集汇总

背景与挑战

背景概述

该数据集为2020年九江市潜在淹没区数据，基于九江水文站警戒水位和SRTM DEM数据，通过提取等于及小于警戒水位线的空间范围并结合长江干流水系分布数据，排除了不连通区域，最终得到九江市潜在淹没区范围。数据采用Albers双纬线圆锥投影，质量经过严格审查，符合技术规定和标准要求。