长江流域重点湖泊1：100万所属流域界限（2018年）

该数据集为长江流域重点湖泊流域界限数据，。主要利用30mDEM数据，在全国2018年30米DEM数据的基础上，利用ArcGIS Desktop中的Hydrology水文分析模块完成河网的提取以及流域边界的生成，再结合100万水系数据、全国一级流域数据、二级流域数据、三级流域数据进行数据修正，得到长江流域太湖、巢湖、鄱阳湖等重点湖泊所属流域界限数据。

This dataset is the watershed boundary data of key lakes within the Yangtze River Basin. Built on the national 2018 30-meter Digital Elevation Model (DEM) dataset, the Hydrology analysis module in ArcGIS Desktop was employed to extract river networks and generate preliminary watershed boundaries. Subsequently, data correction was carried out by integrating 1:1,000,000 scale river system data, as well as national first-level, second-level, and third-level watershed data, ultimately obtaining the watershed boundary data corresponding to key lakes including Taihu Lake, Chaohu Lake, Poyang Lake and others in the Yangtze River Basin.

搜集汇总

背景与挑战

背景概述

该数据集是2018年长江流域重点湖泊的1：100万比例尺流域界限数据，通过30mDEM和ArcGIS水文分析工具结合多级水系数据生成，质量可靠，适用于自然地理学和地表水研究。