基于MODIS数据的潞安矿区土地覆被变化分析

Analysis of Land-cover Changes in Lu′an Mining Area based on MODIS Data

煤矿区生态系统土地覆被变化是指示煤炭开采活动以及影响生态与环境的重要指标之一。基于EOS/MODIS卫星遥感数据,运用ArcGIS9.3统计与分析模块对2001～2008年间潞安矿区生态系统土地覆被变化进行了分析。结果表明:(1)在主要土地覆被类型转换中,以灌丛向稀树草地、稀树草地向农用地、地表水域向无植被区域转换为主。(2)2001～2003年间的灌丛约有150～200 km2转化为2004～2008年间的稀树草地,稀树草地约有100～150 km2转化为农用地,地表水域约有10 km2转化为无植被区域。(3)煤炭开采、农用地开垦等人类活动以及降水量减少、气温升高为特征的气候变化是研究区土地植被类型变化的两个主要原因。

The land-cover change in coal mine areas is one of important indicators which can indicate the influence degree of coal mining activities on ecology environment. Based on EOS/MODIS satellite remote sensing data and using statistics analysis module of ArcGIS9.3, the land-cover changes in Lu＇an mining area from 2001 to 2008 were analyzed. The results showed that among main land-cover type transformations, it mainly transformed from shrubs to savanna, from savanna to farmland, and from surface water area to non-vegetated area. About 150-200 km2 of shrubs, which grew from 2001 to 2003, transformed to savanna during 2004~2008, about 100-150 km2 of savanna transformed to farmland, and about I0 km2 of surface water area transformed to non-vegetated area. The land-cover changes are mainly resuhed from two reasons： one is human activities, including coal mining and reclamation of farmland, the other is climate changes, including decreasing precipitation and increasing temperature.