武汉东湖水域三十年变化(1990-2020)数据集的研发

Time Series Dataset of Wuhan East Lake Changes(1990-2020)

武汉东湖以大型城市湖泊的形态存在于综合型特大城市武汉的东部边缘区。该地区近年来经历了快速城市化过程,是研究快速城市化背景下城市水体变化的理想区域。基于Landsat影像(空间分辨率为30m),利用改进的归一化差异水体指数(Modification of Normalized Difference Water Index,MNDWI)提取东湖水体数据,参考同时期的Google Earth影像对提取的水体数据进行修正,最后得到1990、1995、2000、2005、2010、2015和2020年7期东湖水体形态数据。数据统计结果表明,30年间东湖水域发生了显著变化,大量湖泊面积被占用,共减少14%(5.10 km^(2)),岸线长度缩减22%(43.47 km)。该数据集存储为.shp格式,由7个数据文件组成,数据量为1.91 MB(压缩为一个文件,1.07 MB)。

East Lake of Wuhan exists as a large urban lake in the eastern fringe of Wuhan,a comprehensive mega city.This area had experienced rapid urbanization in recent years,and it is an ideal area to study the changes of urban water body under the progress of rapid urbanization.Based on the Landsat Image(with a spatial resolution of 30 m),the data of the water body for East Lake is extracted based on the Modified Normalized Difference Water Index(MNDWI)and refined by referring to the images on Google Earth.Then the final data for 1990,1995,2000,2005,2010,2015 and 2020 are obtained.The statistical results show that the water body of the East Lake had shrunk by 14%(5.10 km^(2)),and the shoreline length had been reduced by 22%(43.47 km).The dataset is archived in.shp and.kmz formats in seven files with the data size of 1.91 MB.