A Global Lake/Reservoir Surface Extent Dataset (GLRSED)

Global lake/reservoir surface water extent is the basic input data for many studies. Although there are some datasets at present, there are problems such as incomplete or spatial inconsistency exist among them due to various reasons like different data sources and dynamic change characteristics of the surface water. Here, a new Global Lake/Reservoir Surface Extent Dataset (GLRSED) that contains spatial extent and basic attributes (e.g., name, area, lake type and source) of 2.17 million lakes/reservoirs was produced based on HydroLAKES, GRanD and OpenStreetMap. By spatially overlaying GLRSED with other auxiliary data, we identified mountain lakes, endorheic lakes, reservoirs, glacier-fed lakes and permafrost-fed lakes, etc. In addition, we calculated the Surface Water and Ocean Topography (SWOT) orbits passing through each lake. The dataset could provide basic data for global lake/reservoir monitoring, as well as the study on the impact of human actions and climate changes on lake/reservoir freshwater availability, etc.

搜集汇总

背景与挑战

背景概述

GLRSED是一个全球湖泊/水库表面范围数据集，基于HydroLAKES、GRanD和OpenStreetMap整合而成，包含217万个湖泊/水库的空间范围和基本属性（如名称、面积、类型）。该数据集通过叠加其他辅助数据，识别了多种湖泊类型（如山地湖泊、水库），并可用于全球湖泊监测及气候变化对淡水可用性影响的研究。