鄂托克旗土地利用动态变化及其影响要素分析

Analysis on the Land Use Change and Its Influencing Factors in Etuoke

在RS与GIS技术的支持下,利用1991、2000和2007年三期TM影像,对鄂托克旗1991-2007年的土地利用动态变化特征及其影响要素进行分析。结果表明,土地利用最重要的转化方向有:1991-2000年耕地向草地、未利用地和城乡、工矿用地的转化;草地、水域向未利用地的转化;2000-2007年未利用地向草地、水域和耕地的转化;耕地向林地和草地的转化;城乡、工矿居民点用地向草地和林地的转化。反映鄂托克旗既有退耕还林还草、积极治理沙漠的事实,又有毁草开垦荒地的现实。随着耕地和未利用土地的减少,林地和草地面积增加,说明当地环境的改善已取得了成效。

Based on the RS and GIS technology,by use of TM images of three periods in 1991,2000 and 2007,the dynamic change characteristics of land use and influencing factors have been analyzed in Etuoke from 1991 to 2007.The results showed that from 1991 to 2007,the farmland transformed into grassland,unutilized land,urban-rural land and industrial and mining land.The grassland and waters transformed into unutilized land.From 2000 to 2007,unutilized land transformed into grassland,waters and farmland,farmland transformed into forestland and grassland,urban-rural land and industrial and mining land transformed into grassland and forestland.All these reflected that in Etuoke,both returning farmland to forest and grass and reclaiming wasteland existed at the meantime.With the decrease of farmland and unutilized land,the area of forestland and grassland increased,which showed the local environment had been improved.