转移流视角下甘州区土地利用动态变化及空间集聚特征

以甘州区为案例探讨了转移流视角下的土地利用动态变化及空间集聚特征,以为甘州区土地利用空间布局,湿地保护与建设提供参考。研究结果表明:1甘州区自然保留地占绝对优势,耕地、林地、牧草地和水域比例较低,说明后备土地资源较为充足,具有一定发展潜力;2耕地与建设用地、牧草地之间的地类变化是该地区的主要土地利用转移地类,耕地、牧草地和自然保留地是各地类中主要的转移流;3建设用地的活跃度不断增大,2006—2011年达到3.16%,主要原因是城市用地面积扩张,来满足中心城区扩张的增长需求;4地类转移波动度变化主要表现为林地和水域之间的相互转换,波动度均达到最大值2.000 0;5各类土地利用变化的空间分布构成了以中心城区为中心,以不断增长的建设用地为内圈,以牧草地转为耕地这种转移地类为外圈的环形结构;6空间集聚表现出热点区域逐年增加,有向南扩张,沿水系展布的特征。

Land Use Dynamic Change and Spatial Agglomeration in Ganzhou District from the Perspective of Land Use Change Flow

In this article,our purpose is trying to show land use dynamic change and its spatial agglomeration in Ganzhou District from the perspective of land use change flow, which provide a reference for land use spatial distribution of Ganzhou District, wetland protection and construction. Research methods used in this study have the calculation of dynamic degree, activity and volatility, the spatial overlay analysis and the spatial agglomeration, empirical analyses and comparative analysis.The results were obtained as following.The proportion of natural reserved land is predominat in Ganzhou District, however,that of cultivated land,forestry land and grassland are very low .This characticistic shows a large potential for development available.The land use change of cultivated land and construction land, grassland played the important roles in the land use change of Ganzhou District;the main land use change flows are cultivated land, grassland and natural reserved land.The activity of construction land is increasing constantly to 3.16% at the end of 2011, the main reason of the increasing is that the area of urban land expand to fulfill the growing demand of expansion of downtown.The volatility of land use change shows the conversion between waters and forestry land which reached 2.0000.The spatial distribution of land use change types compose a ring structure in the study area,which consist of built-up region as the center,continued growing construction land as the inner ring,and convert grassland into cultivated land as the outer class.The spatial agglomeration of Ganzhou District reveals that the regions with a high land change rate are growing in number, expand to south of the region, overspread along the town and the river. Conclusions show that land use dynamic change and its spstial agglomeration are supplementary information of land use aspects of Ganzhou District, which achieve the aim of sustainable development.