2004-2016永修县土地利用变化及驱动因素分析

本文基于2004年和2015年两期土地利用遥感影像解译数据,结合GIS空间分析法,从土地利用动态度变化、转移矩阵和空间变化3个方面定量与定性相结合,分析了永修县2004-2015年土地利用变化的时空变化特征。结果表明:(1)永修县在研究期间土地利用组合方式未发生明显变化,土地利用组合方式以林地、耕地和建设用地为主,占县域土地总面积的70%以上。(2)不同土地利用类型数量变化特征差异明显,2004-2015年间永修县土地利用类型动态度强弱依次是园地>建设用地>林地>耕地>未利用地>草地。(3)土地利用类型动态变化的空间分异特征明显,受区位与经济驱动因素影响,永修县中部主城区未发生明显变化,西北部、西南部和环鄱阳湖区域均发生不同程度的变化,其中西北部变化区域面积最大,集中在柘林镇、三溪桥镇、虬津镇等区域。

Based on GIS spatial analysis techniques and land use data of Yongxiu in 2004,2015 which wre interpreted by remote sensing images,this study analyzed the spatio-temporal characteristics of land use changes in Yongxin during 2004-2015 from three sides including the land use dynamics change,the transition matrix and the spatial change which include quantitative and qualitative aspects.The results showed as follows:(1)There was no significant change in the combination of land use in Yongxiu County during the study period,and the land use combination mode was dominated by forest land,cultivated land and construction land,accounting for more than 70%of the total land area of the county area.(2)The change characteristics of different land use types are obvious,and the dynamic degree of land use type in Yongxiu County between 2004 and 2015 was the parkland,construction land,forest land and unused grassland.(3)The spatial difference characteristics are obvious of the dynamic change of land use,influenced by the location and economic drivers,the main urban area in Yongxiu County has not changed significantly,and the northwest,southwest and the surrounding Poyang Lake area have all changed to varying degrees,including the largest area of change in the northwest,concentrated in the areas such as Zhelin Town,Sanxiqiao Town and Qiujin Town.