南京市潜在淹没区数据集(2020）

南京市2020年潜在淹没区数据集。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南京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，得到南京市潜在淹没区范围。

Nanjing 2020 Potential Flooded Area Dataset. This dataset is developed based on the local warning water level of Nanjing. Using SRTM DEM data, the spatial extent of areas within Nanjing that are equal to or lower than the warning water level is extracted from the planar digital elevation model. Furthermore, by combining with the distribution data of the Yangtze River main stem water system, disconnected regions within the area below the warning water level are excluded, and the final potential flooded area extent of Nanjing is derived through the watershed boundary.

搜集汇总

背景与挑战

背景概述

该数据集是南京市2020年的潜在淹没区数据，基于警戒水位和SRTM DEM提取低洼区域，并结合长江水系排除不连通部分，以流域范围确定最终淹没区。它提供了南京市在特定水位条件下的淹没风险空间分布，适用于洪水风险评估和城市规划。