高潜水位煤矿区沉陷水体信息提取  

Extraction of subsided water information in high phreatic coal mining area

作　　者：周晶晶 李新举 于新洋[1,2] ZHOU Jingjing;LI Xinju;YU Xinyang(National Enginering Laboratory for Efficient Utilization of Soil and Fertilizer Resou rces,Taian,Shandong 271018,China;College of Resources and Environment,Shandong Agricultural University,Taian,Shandong 271018,China)

机构地区：[1]土肥资源高效利用国家工程实验室,山东泰安271018 [2]山东农业大学资源与环境学院,山东泰安271018

出　　处：《测绘科学》2021年第5期104-111,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41771324)。

摘　　要：针对高潜水位煤矿区煤炭开采后极易形成大面积的沉陷积水区,且沉陷水体信息易与矿区其他地物混淆的问题,该文提出了针对高潜水位矿区水体信息提取的增强型改进归一化水体指数(E-MNDWI)。对研究区典型地物光谱进行分析,将E-MNDWI应用于Landsat系列数据,并对比验证该指数与改进归一化水体指数(MNDWI)的精度水平。研究结果表明:矿区投入运行后,利用E-MNDWI提取沉陷水体的精度普遍较MNDWI高,总体精度在90%以上,Kappa系数大于80%。选取高分1号数据作为验证数据源,发现E-MNDWI的计算面积精度高达93.07%。与其他水体指数对比,E-MNDWI的综合精度最高。E-MNDWI对于山区和平原水体提取具有较好的效果,能够消除山体阴影和其他物体倒影的影响。According to the problem that massive water covered subsidence areas was easily formed in high phreatic coal mining area and the information of subsided water was easily confused with other ground features in the mining area,this paper proposed an enhanced modified normalized difference water index(E-MNDWI)for water information extraction from high phreatic coal mining area.Based on the analysis of the spectrum of typical features in the study area,E-MNDWI was applied to Landsat series data.E-MNDWI improved the accuracy level of the modified normalized difference water index(MNDWI).The research results showed that the accuracy of extracting subsided water with E-MNDWI was generally higher than that of MNDWI after the mining area was put into operation.The overall accuracy was more than 90%,and the kappa coefficient was more than 80%.The GF-1 data was selected as the verification data source,and the calculated area accuracy of E-MNDWI was as high as 93.07%.Compared with other water indexes,E-MNDWI had the highest comprehensive accuracy.E-MNDWI also had a good effect on the water extraction in mountainous and plain areas,and could eliminate the influence of mountain shadow and other object reflection.

关 键 词：高潜水位煤矿区 沉陷水体信息提取 增强型改进归一化水体指数 改进归一化水体指数 

分 类 号：P237[天文地球—摄影测量与遥感]