1990-2021年蒙古高原年度丰水期水体数据集  

A dataset of the annual water bodies in wet seasons on the Mongolian Plateau during 1990-2021

作　　者：王妍 刘帅 邱丽莎 单炜 WANG Yan;LIU Shuai;QIU Lisha;SHAN Wei(Institute of Cold Regions Science and Engineering of Northeast Forestry University,Harbin 150040,P.R.China;Ministry of Education Observation and Research Station of Permafrost Geo-environment System in Northeast China(MEORS-PGSNEC),Harbin 150040,P.R.China;Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China(CIC-PERCM),Harbin 150040,P.R.China)

机构地区：[1]东北林业大学,寒区科学与工程研究院,哈尔滨150040 [2]东北多年冻土区地质环境系统教育部野外科学观测研究站,哈尔滨150040 [3]东北多年冻土区环境、道路建设与养护协同创新中心,哈尔滨150040

出　　处：《中国科学数据（中英文网络版）》2023年第1期69-82,共14页China Scientific Data

基　　金：黑龙江省交通运输厅科技项目,多年冻土退化区路堑边坡植物固坡机理与适生性研究。

摘　　要：蒙古高原生态系统脆弱,土地荒漠化严重,是亚洲地区主要的气候敏感区域之一,其水资源的时空变化有重要的研究价值。本数据集利用Google Earth Engine(GEE)平台,对近32年(1990-2021年)可用的高质量Landsat系列卫星影像进行处理。利用最小云量合成算法,得到每年的丰水期(6-9月)最小云量影像。计算NDWI后采用大津算法进行阈值分割,提取得到32年蒙古高原逐年丰水期30 m分辨率水体数据,最终结果以GeoTIFF格式保存。通过对比,数据集与JRC年度水体数据的永久水体和最大水体的一致性平均值分别为93.0%和90.9%,具有较高的可信度。数据集可以为蒙古高原水资源变化、生态建设规划、环境保护等提供数据支撑。The Mongolian Plateau is characteristic of fragile ecosystem and serious land desertification.As one of the main climate-varied sensitive regions in Asia,it is of great value for the study on temporal and spatial changes of water resources.For the production of this dataset,we used Google Earth engine(GEE)platform to process the high-quality Landsat series satellite images available in the past 32 years(1990-2021).Using the minimum cloud amount synthesis algorithm,we obtained the minimum cloud amount images in the wet season(from June to September)of each year.After calculating NDWI,we further used the OTSU algorithm for threshold segmentation,and extracted the yearly water body data with 30m resolution on the Mongolian Plateau in the wet season for 32 years.The final data results are saved in GeoTIFF format.Through comparison,the average consistency between this dataset and the JRC annual water body data in both permanent water body and maximum water body is 93.0%and 90.9%respectively,which indicates the high reliability of this dataset.The dataset can provide data support for water resource changes,ecological construction planning,environmental protection,etc.on the Mongolian Plateau.

关 键 词：蒙古高原 水体 大津算法 归一化水体指数 

分 类 号：TV213.4[水利工程—水文学及水资源] P332[天文地球—水文科学] TP751[天文地球—地球物理学]