采用不同时期的卫星影像对勐腊县象明乡林地变化状况进行分析

Analysis on Forestry Land Changes of Xiangming Township in Mengla County with Satellite Images at Different Stages

采用1999年TM卫星影像及2006年SPOT 5卫星影像,借助已有森林资源二类调查资料对此期间勐腊县象明乡土地利用变化状况进行分析.对分析的原理、方法、步骤作了论述.分析结果表明,期间总的趋势是林地面积增加,农地面积减少;有林地面积增加、宜林荒山减少;乔木经济林增加,其它灌木林减少.分析结果符合当地同期土地利用实际状况.

TM satellite images in 1999 and the SPOT 5 satellite images were adopted to analyze land use changes of Xiangming Township in Mengla County with the aid of inventory data of forest resources which had already been obtained. The paper elaborates the principle, method and procedures of the analysis. The resuh indicates that the general trend for the change is like that forestland area increases, while farmland area decreases; forested land increases, while desolate mountain suitable for forest decreases; economic arbor forest increases, while other shrub decreases. The outcomes of the analysis accord with local actual land use situation at same period of time.