A dataset of lakes in Qinghai province with an area above 1.0 km2 in 2020

Qinghai province (31°39′~39°19′N, 89°35′~103°04′E) is located in the northeastern part of the Qinghai-Tibetan Plateau. As the source region of the Yangtze River, the Yellow River and the Lantsang River, it is known as the China Water Tower. The contemporary investigation of lakes in Qinghai province is of great significance to understand the impacts of climate change and promote the ecological civilization construction. Based on Sentinel-2A/2B MSI images acquired in 2020, the pixels of water body were firstly extracted according to the normalized difference water index (NDWI) greater than the normalized difference vegetation index (NDVI). Then the vector dataset of lake boundary with an area above 1.0 km2 in Qinghai province was built after manual inspection and revision. Some attributes of the lake including its name, area, elevation, basin, administration and date were also attached. This dataset reflects the status of lakes in Qinghai province in 2020, and can be used as the data source and scientific basis for researches on lake ecological protection, rational use of regional water resources, disaster prevention and mitigation in Qinghai province.

青海省（31°39′~39°19′N，89°35′~103°04′E）地处青藏高原东北部，作为长江、黄河和澜沧江的发源地，素有中国水塔之称。对青海省湖泊的当代研究对于理解气候变化的影响以及推动生态文明建设具有重要意义。本数据集基于2020年获取的Sentinel-2A/2B MSI影像，首先根据归一化差分水指数（NDWI）大于归一化差分植被指数（NDVI）的原则提取水体像素。随后，经过人工检查与修订，构建了青海省面积超过1.0 km²的湖泊边界矢量数据集。同时，附带了湖泊的一些属性，包括名称、面积、海拔、流域、行政区划及日期等信息。该数据集反映了2020年青海省湖泊的现状，可作为湖泊生态保护、区域水资源合理利用、青海省灾害预防和减轻等研究的数据来源和科学依据。