基于NDVI时序分类的胜利矿区开采扰动-恢复轨迹类型及时间信息提取  

Extraction of mining disturbance-recovery trajectory types and temporal information in Shengli mining area based on NDVI time series classification

作　　者：麻慧鑫 李晶[1] 琚成远 MA Huixin;LI Jing;JU Chengyuan(College of Geoscience and Surveying Engineering,China University of Mining&Technology,Beijing 10083,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《煤炭科学技术》2024年第S2期458-469,共12页Coal Science and Technology

基　　金：国家重点研发计划资助项目(2016YFC0501101-4)。

摘　　要：为重构草原矿区开采历史的时序信息,以胜利矿区为例,应用1985—2017年32期Landsat TM/OLI影像,对比分析了3种时间序列分类模型的分类精度和效率,如随机森林(Random Forests,RF)和基于时间动态扭曲的近邻算法(DTW-kNN),以及基于卷积神经网络的残差网络模型(Residual Network,Resnet)。最终根据NDVI时间序列的变化轨迹特征,分别提取了煤炭开采对植被的扰动时间、扰动恢复时间及扰动时长。研究结果表明:①Resnet模型在NDVI时间序列分类中相对效果最优,分类精度为90.1%,Kappa系数为0.898;②受扰动和未受扰动区域分别占研究区的16.5%和83.5%,扰动未恢复区域占研究区的9.5%;③扰动主要发生在2005—2008年,2008年扰动面积最大;扰动恢复主要发生在2008年及之后,2009年扰动恢复面积最大。扰动后恢复类型的持续扰动时长以5年居多,平均扰动时长为6.7年。In order to reconstruct the time series information of the mining history of the grassland mining area,taking the Shengli mining area as an example,32 Landsat TM/OLI images from 1985 to 2017 were applied to compare and analyze the classification accuracy and efficiency of three time series classification models,such as random forest(Random Forests,RF)and the nearest neighbor algorithm based on time dynamic distortion(DTW-kNN),and the residual network model based on convolutional neural network(Residual Network,Resnet).Finally,according to the change trajectory characteristics of the NDVI time series,the disturbance time,disturbance recovery time and disturbance duration of coal mining on vegetation are respectively extracted.The research results show that:①The Resnet model has the best relative effect in the NDVI time series classification,with a classification accuracy of 90.1% and a Kappa coefficient of 0.898;②The disturbed and undisturbed areas account for 16.5% and 83.5% of the study area,respectively.The unrestored area of disturbance accounted for 9.5% of the study area;③Disturbance mainly occurred during 2005-2008,with the largest disturbance area in 2008;disturbance restoration mainly occurred in 2008 and after,with the largest disturbance recovery area in 2009.The duration of continuous disturbance of the recovery type after disturbance is about 5 years,and the average disturbance duration is 6.7 years.

关 键 词：胜利矿区 NDVI 时间序列 矿区扰动 Landsat影像 煤炭开采 

分 类 号：TD88[矿业工程—矿山开采]