淮南市水域面积变化遥感监测

Remote sensing monitoring of water area change in Huainan City

随着煤炭的持续开采,煤矿塌陷区积水造成水域面积大幅增加的问题逐渐引起重视。以2005年、2009年Landsat TM影像和2013年、2017年Landsat8OLI影像作为数据源,对淮南市丰水期水域面积进行遥感监测。使用改进的归一化差异水体指数MNDWI(Modified NDWI)提取水体,监测淮南市水域分布的动态变化,得到以下结论:淮南市在2005年、2009年、2013年、2017年水域面积分别为189km^2、207km^2、220km^2、256km^2。2009年、2013年和2017年相对于2005年增加水域面积分别为24km^2、45km^2、81km^2,其中,2013—2017水域面积增加最快,水域面积增加区域主要集中在潘集区和凤台县境内。

With the continuous mining of coal,the problem of large increase of water area caused by the water accumulation in the subsidence area of coal mine has attracted more and more attention.Landsat TM images in 2005 and 2009 and Landsat8 OLI images in 2013 and 2017 were used as data sources to conduct remote sensing monitoring of the water area in the rainy season of huainan city.The improved normalized difference water body index(MNDWI)was used to extract water and monitor the dynamic changes of water distribution in Huainan city.The following conclusions can be drawn:in 2005,2009,2013 and2017,the water area of huainan city were 189 km^2,207 km^2,220 km^2 and 256 km^2 respectively.The increase of water area in 2009,2013 and 2017 were 24 km^2,45 km^2 and 81 km^2,respectively,compared with 2005.The increase of water area is mainly concentrated in Panji District and Fengtai County.