摘要
根据1975、1987、1995、2000和2005年的遥感影像解译出的城镇用地数据,分析了城镇扩展过程中耕地占用的规律,采用城镇用地扩展强度、城镇用地扩展极核、城镇用地扩展类型、城镇用地扩展紧凑度、城镇用地分维数等理论模型从数量上对研究区城镇用地的扩展进行了对比分析,然后采用缓冲区分析从空间上对研究区在不同缓冲区带内的扩展轨迹开展了对比分析。研究结果表明耕地占用较多的是重庆市区、渝北区;受重庆市区和渝北区生长极核的影响,邻近区县的扩展强度比较大;总的来看其扩展平稳有序,属紧凑填充式;缓冲区分析对城镇扩展的轨迹研究是有效的,在研究区的第二缓冲带内的城镇扩展的强度是较大的。对研究区1975～2005年期间城镇用地对耕地占用情况及扩展的空间模式的分析,有利于控制未来城镇化对耕地的占用,把握城市化进程所处的阶段及预测城市的未来发展趋势。
Rule of urban land expansion and cultivated land occuption was analyzed based on interpretation of remote sensing image data in 1975, 1987, 1995, 2000 and 2005. Urban land expansion was conducted a quantitative analysis with urban land expansion intension, urban land expansion core, urban land expansion type, compact degree of urban land expansion and urban land expansion fractal index theoretical model. Spatial analysis of expansion track in different buffer scales was conducted by buffer analysis method. The results showed that Chongqing urban district and Yubei district were occupied a large number of culitivated land. Near the districts affected by expansion core of Chongqing urban district and Yubei district were higher expansion intension. The expansion was order and the expansion model was filling. Buffer analysis was an effective method in the research of urban expansion track. The urban expansion intension was higher in the second buffer strand of the study area. Analysis of the urban expansion encroachment onto cultivated land and its expansion spatial model in 1975-2005, which is help for controlling urbanization encroachment onto cultivated land, grasping urbanization stages and predicting the development trend in the future.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2009年第6期254-260,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
“十一五”国家科技支撑计划“区域土地集约利用与节地关键技术研究”(2006BAB15B03)
关键词
耕地城镇化
城镇土地
扩展
缓冲区
三峡库区
cultivated land urbanization, urban land, expansion, buffer analyses, Three Gorges reservoir
