武汉城市圈典型城镇耕地资源时空演变特征

利用GIS空间分析技术,选择武汉城市圈内的嘉鱼县鱼岳镇为研究区,以2005年和2010年两期土地利用数据为数据源,分析鱼岳镇耕地资源时空变化与数量特征。结果表明,鱼岳镇耕地减少速度较快,耕地连片度明显降低,不同土地利用类型与耕地间的转换差异明显,城镇用地和林地是耕地流失转换的主要方向;而农用地整理和未利用地开发则是耕地增加的主要土地整治方式。研究期间,鱼岳镇耕地流失速度过快,有效后备资源供给不足,耕地供需基本处于一种失衡的状态,应以"开源节流"的理念科学引导耕地资源的可持续利用。

Temporal-spatial Evolution Feature of Arable Land Resource in A Typical Town of Wuhan Urban Agglomeration

Choosing Yuyue town in Jiayu county as the study area, cated in Wuhan urban agglomeration, the temporal-spatial evolu-which is lotion and quantitative features of arable land resource were analyzed by using GIS spatial analysis technology based on the land use images of Jiayu in 2005 and 2010. The result shows that there is a rapid decrease of arable land in Yuyue, and the concentration of arable land is significantly decreased. There is significant conversion difference between arable land and other land use types. Town land and woodland are the main contributors to arable land loss, while agricultural land consolidation and unused land exploitation are the main land consolidation types to arable land increase. The supply and demand of arable land is in an imbalance state because of quick arable land loss and insufficient arable land supply. Sustainable utilization of arable land resources should be guided by the idea of opening up the source and regulating the flow.