摘要
[目的]深入理解土地利用的变化模式和变化过程,充分利用多期时间序列土地利用数据来探究特征规律。[方法]以长沙市为例,借助地理信息系统(GIS)和IDRISI软件操作平台量化土地利用变化的转移次数和转移地类的时空变化。[结果](1)随着转移次数和地类数的增多,对应变化的像元数在减少,2个地类变化1次的新增变化比较突出。(2)主要表现为城市扩张占用外围耕地和林地明显,面积分别为202.86,169.96km^2,而在乡村地区通过建设用地转为耕地来补给耕地,面积分别为48.27,12.04km^2。(3)其他城镇和长沙市中心城区变化模式相似但辐射能力较弱。[结论]长沙市的城市扩张加速进行,土地整治等能补给少量的耕地和林地,但城市扩张占用外围耕地和林地仍是当地土地利用中主要的变化方式,且当地的土地利用模式和规模遵循一定的城市等级位序。
[Objective] To understand the patterns and processes of land use change, and to make full use of the time series land use data to investigate the characteristics of land use patterns.[Methods] Changsha City was selected as an example and the geographic information system （GIS） and IDRISI platform were used to calculate the transfer frequency of land use change and involved land use categories.[Results] ① With the increase of the times and categories of land use transfer, the corresponding changes in the number of pixels were reduced, and the change involved 2 categories and transfer once was more prominent. ② Urban expansion obviously occupied crop land and woodland in the periphery of urban region, the area was 202.86 km2 and 169.96 km2, respectively. While the construction land was converted into cropland to compensate for occupied crop and woodland in rural region, the area was 48.27 km2 and 12.04 km2. ③ The change pattern of other towns was similar with the central area of Changsha City but their radiating capacity was relatively weak.[Conclusion] Changsha＇s urban expansion is accelerating. Land reclamation can supply a small amount of cultivated land and forest land, but the urban expansion in the cost of outer cultivated land and forest land is still the main change mode. In addition, the local land use patterns and scales follow a certain urban hierarchy.
出处
《水土保持通报》
CSCD
北大核心
2018年第1期182-186,共5页
Bulletin of Soil and Water Conservation
基金
湖南省教育厅重点项目"中国城市土地利用变化量化及比较"(17A067)
中国国家高端外国专家项目(GDW20154300243)
国家自然科学基金项目(41271167
41171076
41771188)
衡阳师范学院引进人才科研启动项目(17D03)
关键词
土地利用变化
转移次数
转移地类
长沙市
land use change
tranfer times
tranfer category
Changsha City
