基于Google Earth Engine的湖北省近35年地表水变化特征研究

Research on the Variation Characters of Surface Water in Hubei Province in Recent 35 Years Based on Google Earth Engine

近年来,随着人为影响的加剧、社会经济的高速发展,地表水覆盖面积呈逐渐缩减态势。受研究范围广、统计难度大等因素的影响,湖北省地表水面积变化特征难以精确分析。利用Google Earth Engine平台(简称GEE),对湖北省及各行政区的地表水覆盖的变化特征情况进行分析与评价。结果表明:2000-2018年,湖北省地表水覆盖面积减少趋势明显,减少面积达1886.5 km2。各行政区中,荆州市、武汉市以及襄阳市地表水面积减少幅度较大,分别为450、364.8和210.8 km2;湖北省地表水覆盖季节性特征明显,覆盖月数为12个月的水面面积为总水面面积的46.4%;湖北省地表覆盖类型变化特征分析显示,湖北省永久性水面面积占比较小,季节性水面面积较大,受洪涝灾害影响明显且涉及范围较广。

In recent years,with the aggravation of human influence and the rapid development of social economy,the surface water coverage has been decreasing gradually.It is difficult to accurately analyze the variation characters of surface water area in Hubei province due to the influence of wide research scope and statistical difficulty.In this paper,the Google Earth Engine platform(GEE)is used to calculate and analyze the variation characters of surface water cover in Hubei province and its administrative regions.The results showed that between 2000 and 2018,the decreasing of surface water coverage in Hubei province was significant,with a area decreasing of 1886.5 km2.Among the administrative regions,the surface water area of Jingzhou,Wuhan and Xiangyang decreased significantly,the area is 450,364.8 and 210.8 km2,respectively.The seasonal characteristics of surface water cover in Hubei province are obvious and the surface area covered for 12 months is 46.4%of the total surface area.The analysis of the variation characters of land cover types in Hubei province shows that the permanent surface area of Hubei province is relatively small,and the seasonal surface area is larger.It is significantly affected by flood and waterlogging disasters,which involves a large range.