典型经济快速发展区耕地变化区域分异研究

发布时间：2018-04-15 20:49

本文选题：耕地数量 + 耕地质量　；参考：《长江流域资源与环境》2017年10期

【摘要】：耕地变化的区域分异研究可为确保国家粮食安全和生态安全提供重要依据。基于RS和GIS技术,分析太湖流域1985~2015年耕地数量、质量和动态结构的时空演化格局。结果表明:近30a流域耕地呈现以城镇为中心面的边缘扩散和以乡镇为中心点的散布流失特征,导致耕地净减少了38.87%,其中环湖、沿江城市密集区及县域空间拓展区是耕地流失的热点区域。耕地集中连片分布区与经济发展快速区的空间复合导致耕地缩减与建设用地扩张呈现空间对应关系,建设占用始终是驱动耕地减少的主要因素。不同阶段受经济发展水平和农业政策影响,不同地类对耕地转移的贡献率和空间分布差异明显,且转移比例在数量和质量上均不对等。总体上,耕地变化呈现由缓慢零散占用到快速集聚流失的过程,耕地数量和质量变化高值和低值区亦表现由分散到集中的格局,最终驱动了耕地优势区由环湖平原区向西南丘陵区的空间转移。
[Abstract]:The research on regional differentiation of cultivated land change can provide important basis for ensuring national food security and ecological security.Based on RS and GIS techniques, the temporal and spatial evolution patterns of cultivated land quantity, quality and dynamic structure in Taihu Lake Basin from 1985 to 2015 were analyzed.The results showed that the cultivated land in recent 30 years showed the characteristics of marginal diffusion with the town as the center and the dispersion and loss of the township as the center point, which resulted in the net decrease of the cultivated land in 38.87, in which the lake was surrounded.Urban concentrated area and county spatial expansion area along the Yangtze River are the hot spots of cultivated land loss.The spatial combination of concentrated and continuous distribution area of cultivated land and rapid economic development area leads to the spatial correspondence between cultivated land reduction and construction land expansion. Construction occupation is always the main factor driving the decrease of cultivated land.Under the influence of economic development level and agricultural policy, the contribution rate and spatial distribution of different land types to cultivated land transfer are obviously different, and the transfer ratio is not equal in quantity and quality.In general, the change of cultivated land shows a process from slow and scattered occupation to rapid agglomeration and loss, and the high value and low value areas of the change of cultivated land quantity and quality also show a pattern of dispersion to concentration.Finally, it drives the spatial transfer of the dominant cultivated land area from the lakeside plain to the southwest hilly area.
【作者单位】：河北师范大学资源与环境科学学院;河北省环境演变与生态建设实验室;河北师范大学地理学博士后科研流动站;中国科学院南京地理与湖泊研究所;河北省城乡规划设计研究院;
【基金】：国家自然科学基金项目(41401646) 河北省自然科学基金项目(D2015205154) 河北省高等学校青年拔尖人才计划项目(BJ2017024) 河北省社会科学基金项目(HB17GL065) 河北省自然地理学重点学科项目~~
【分类号】：F323.211

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