基于地学信息图谱的江汉平原土地利用时空变化分析

(武汉大学 城市设计学院, 武汉 430070)

地学信息图谱; 土地利用; 时空变化; 江汉平原

Analysis on Spatial and Temporal Change of Land Use in Jianghan Plain Based on Geo-information Atlas
ZHANG Yun, PENG Jiandong, WANG Jingjing, YANG Hong

(School of Urban Design, Wuhan University, Wuhan 430070, China)

geological information atlas; land use; spatial and temporal change; Jianghan Plain

备注

为分析江汉平原土地利用时空变化特征,探索土地利用变化原因、过程并预测未来变化趋势,基于江汉平原1990年、2000年和2010年土地利用空间数据,运用地学信息图谱方法,构建两个时序的土地利用变化图谱、涨落势图谱和变化模式图谱,分析了江汉平原1990—2010年土地利用的时空变化规律和发展过程。结果 表明:(1)1990—2010年耕地和水域是主要土地利用类型,耕地持续减少,水域和建设用地持续增加;(2)变化图谱以耕地与水域、建设用地间的互相转换为主。耕地与水域间的互相转化集中于低湖平原区; 耕地转化为建设用地贯穿整个研究时段,主要是经济相对发达的城区周边区域; 而建设用地转化为耕地发生在后期,集中在石首市和松滋市等地;(3)落势图谱中萎缩耕地面积最大,占68.63%; 增势图谱中新增水域面积最大,占46.39%。各县市存在明显差异;(4)变化模式图谱中全期稳定型占据主要地位,其次是后期变化型。研究表明江汉平原土地利用变化呈现土地利用类型“典型化”、土地动态变化“差异化”和土地变化模式“稳定化”的特征。

In order to analyze the temporal and spatial characteristics of land use change in Jianghan Plain, explore the causes and process of land use change, and predict the future trend of land use change, based on the spatial data of land use in 1990, 2000 and 2010 in Jianghan Plain, the land use change map, fluctuation map and change pattern map of two time series were constructed by using the method of geoscience information map, and the temporal and spatial changes and development process of land use in Jianghan Plain from 1990 to 2010 were analyzed. The results showed that:(1)between 1990 and 2010, cultivated land and water area were the main types of land use, cultivated land continued to decrease, water area and construction land continued to increase;(2)the main change map was the conversion among cultivated land and water area, construction land; the mutual transformation between cultivated land and water area concentrated in the low lake plain; the conversion of cultivated land to construction land ran through the whole research period, mainly in the surrounding areas of urban areas with relatively developed economy; and the conversion of construction land to cultivated land occurred in the later stage, mainly in Shishou City and Songzi City;(3)the area of shrinking cultivated land was the largest in the landslide map; the newly added water area was the largest, accounting for 46.39%; there were obvious differences in the area changes among the counties and cities;(4)the stability of the whole period occupied the main position in the change pattern map, followed by the later change pattern. This study shows that land use change in Jianghan Plain is characterized by typification of land use type, differentiation of land dynamic change and stabilization of land change mode.