摘要
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、黄河和澜沧江等诸多河流的发源地,被誉为“中华水塔”,开展青海省内湖泊现状调查对正确认识气候变化影响和推进生态文明建设具有重要意义。本数据集使用Sentinel-2A/2B MSI高分辨率影像,基于水体的归一化差异水体指数(NDWI)大于归一化差异植被指数(NDVI)这一特征进行逐像元初步筛选,经人工检核修订后构建2020年青海省面积≥1.0 km^(2)的湖泊边界数据集,其中包括湖泊名称、面积、高程、流域、行政区划和日期等属性信息。本数据集反映了2020年青海省湖泊分布状况,可作为青海省湖泊生态环境保护、区域水资源合理利用以及防灾减灾等研究的数据源和科学依据。
Located in the northeastern part of the Qinghai-Tibetan Plateau,Qinghai Province(31°39′-39°19′N,89°35′-103°04′E)is the source region of the Yangtze River,the Yellow River and the Lantsang River.It is known as the China Water Tower.Contemporary survey of lakes in Qinghai Province is of great significance for understanding the impacts of climate change and promoting the ecological civilization construction.Based on Sentinel-2A/2B MSI images acquired in 2020,we first extracted the pixels of water body on account of the feature that the normalized difference water index(NDWI)greater than the normalized difference vegetation index(NDVI).Then we built the vector dataset of lake boundary with an area above 1.0 km2 in Qinghai Province 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 distribution of lakes in Qinghai Province in 2020,and can be used as a data source and scientific basis for researches on lake ecological protection,rational use of regional water resources,disaster prevention and mitigation in Qinghai Province.
作者
张鸿芳
姚晓军
肖建设
王玉
沙特
张聪
ZHANG Hongfang;YAO Xiaojun;XIAO Jianshe;WANG Yu;SHA Te;ZHANG Cong(College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070.P.R.China;Institute of Qinghai Meteorological Science Research,Xining 810008.P.R.China)
基金
国家自然科学基金项目(41861013,42071089)
2020年山洪地质灾害防治气象保障工程项目(2020KYSJZTP-011)。
