纳雍县土地利用动态变化分析

Analysis of dynamic changes of land use in Nayong county

以纳雍县1992年、2000年、2008年3期遥感影像为主要数据源,在ERDAS、ARCView、ArcGIS软件的支持下,基于RS和GIS技术研究了纳雍县16年来土地利用变化特征。结果表明:在1992年到2008年期间,纳雍县土地利用类型变化幅度较大,有林地和疏林地面积呈现先减少后增加的趋势,灌木林地和建设用地面积都呈增加趋势,水田和荒草地面积都呈减少趋势,水体基本无大的变化,旱地呈现先增加后减少的趋势。发生这种变化的主要驱动力是人口的大量增加、政策的变化、经济利益的驱动等等。

Using the images of Nayong county obtained in 1992, 2000 and 2008, with the software ERDAS, ARCView and ArcGIS, the paper studied the change features of the land use of Nayong in the past sixteen years based on the RS and GIS technologies. The results showed that the change range of land use types in Nayong was large from 1992 to 2008. The area of forest and open woodland decreased first and then increased. Area of shrubland and construction land increased. Area of paddy fields and deserted grassland deereaed. There was no great change in waters. Area of dry land increased at_first and then decreased. The population growth, policy alteration and economic profit were factors that made these changes.