采煤塌陷积水区时空动态变化监测研究

摘要

Using four years of Landsat series remote sensing image data of water body in Huainan mining area,the dynamic change of subsidence seeper areas were studied.Based on the spectral characteristics of water body,using normalized difference vegetation index (NDVI),normalized difference water index NDWI) and tasseled cap transformation indexes,constructing decision tree classification rule and GIS comparison method,the dynamic change of the water body was obtained.The results showed that during 1987-2015,the seeper subsidence area was 189.51 km2,with an average annual increase of 6.77 km2.Especially in 2000-2005,the average annual increase was 15.0 km2.The dynamic change degree of the water body and the spatial dynamic change degree were up to 13.66％ and 53.61％,respectively.The average annual increase of the seeper subsidence area was 2.60 km2 in Fengtai mining area,followed by Xinji,Panji and Kongli subsidence area.The water body was increased in Panji and Fengtai mining areas,remained stable in Dingji and Zhuji mining areas,and reduced in other mining areas by the "subsidence management strategy".%基于Landsat系列4个时相数据,利用谱间关系法提取NDVI、NDWI和缨帽变换指数,并采用决策树和分类后比较法研究淮南矿区采煤塌陷积水区时空变化.结果表明:1987-2015年淮南矿区塌陷积水区域面积为189.51 km2,年均增加6.77 km2.其中,2000-2005年塌陷积水区域面积变化较大,年均增加15.0 km2,其水域数量变化动态度和空间变化动态度分别高达13.66％和53.61％.凤台矿区年均增加积水面积最大,为2.60 km2,其次为新集、潘集和孔李沉陷区,9大沉陷区及其他矿区增幅较小.在“边塌陷边治理”下,除潘集和凤台矿区水域面积增加,丁集朱集矿基本持平外,其他矿区水域面积均有所减少.