宁夏彭阳县土地利用变化及驱动力分析

Analysis of Land Use Change and Its Driving Forces in Pengyang County of Ningxia

以宁夏限制开发生态区典型县域彭阳县为研究对象,基于2000年,2005年,2010年,2015年4期土地利用解译数据,结合土地利用动态变化模型和土地利用强度指数,揭示了彭阳县土地利用年变化率及变化特征,并采用主成分分析法对土地利用变化的驱动因素进行了分析。结果表明,2000—2015年彭阳县土地利用类型以耕地、林地、草地为主,土地利用整体特征未发生显著改变,其中,林地、建设用地处于增加趋势,草地与耕地面积在减少,水域和其他用地面积变化幅度较小;土地利用强度指数从2000年的286.56%增加到2015年的287.90%,人类对土地利用的干扰程度逐渐加深;经济发展、产业结构优化、人口增长是彭阳县土地利用变化的主要驱动力。

The annual change rate and change characteristics of land use in Pengyang County,a typical county area for restricting the development of ecological zones in Ningxia,have been discussed based on the four-stage land use interpretation data the land use dynamic change model,and the land use intensity index to reveal Principal component analysis was used to analyze the driving factors of land use change.The results show that from 2000 to 2015,the land use types in Pengyang County were mainly cultivated land,forestland and grassland,and the overall characteristics of land use did not change significantly.Among them,forest land and construction land were in an increasing trend,grassland and cultivated land area were decreasing,water area and the land use intensity index increased slightly;The land use intensity index increased from 286.56%in 2000 to 287.90%in 2015,indicating that human interference with land use had gradually deepened;Economic development,industrial structure optimization,and population growth are the main driving force for land use change.