基于GIS的商丘市土地利用时空变化分析

Analysis of Spatial and Temporal Changes of Land Use in Shangqiu City Based on GIS

土地利用/覆盖变化是造成全球环境变化的主要原因之一,基于GIS技术,结合土地利用转移矩阵、土地利用动态度模型对商丘市2000年和2015年两期的土地利用数据进行分析。结果表明,耕地一直是商丘市最主要的土地利用类型,2000年与2015年的用地面积分别为8564.84 km^(2)、7961.96 km^(2),分别占商丘市总面积的80.26%、74.37%;15年来,商丘市的耕地面积减少了602.88 km^(2),而其中有528.37 km^(2)的耕地转变为建设用地;同时建设用地面积增长最快,面积增加697.57 km^(2),占其2000年用地面积的37.57%;商丘市总体土地利用变化空间范围较大,尤其是商丘市主城区周围和商丘西北部地区,新增的建设用地围绕着已有建设用地向外扩散。

Land use/cover change is an important component and one of the main causes of global environmental change.Using GIS technology,combined with land use transfer matrix and land use dynamic degree model,the land use data of Shangqiu City in 2000 and 2015 were analyzed.The results show that cultivated land has always been the main land use type in Shangqiu City.The land area in 2000 and 2015 were 8564.84 km^(2)and 7961.96 km^(2),accounting for 80.26%and 74.37%of the total area of Shangqiu City;in the past 15 years,the cultivated land area of Shangqiu City has decreased by 602.88 km2,of which 528.37 km^(2)cultivated land converted into construction land.At the same time,the area of construction land increased by 697.57 km^(2),accounting for 37.57%of the total land area in 2000.The spatial range of land use change in Shangqiu City is large,especially around the main urban area of Shangqiu City and the northwest area of Shangqiu City.The newly increased construction land spreads around the existing construction land.