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以重庆市北碚区为例,结合土地利用总体规划、土地利用现状变更调查、农用地分等数据,采用GIS空间分析方法,通过动态度模型和区域差异模型,计算分析了2005-2020年规划期间研究区建设用地及耕地变化情况,探讨该地区未来建设用地扩张情况及其对耕地数量和质量的潜在威胁.建议将农用地分等成果运用到土地利用总体规划的制定中,对规划占用的耕地进行质量评价,调整土地规划方案,从源头上降低建设用地扩张对耕地数量及质量的影响,以期对耕地保护作出一定贡献,有效保障我国粮食安全.
Taking Beibei District of Chongqing Municipality as an example, this paper uses GIS spatial analysis method, dynamic degree model and regional difference model to calculate and analyze the planning period from 2005 to 2020 in combination with the overall land use planning, land use change survey and agricultural land classification data. The study area construction land and the change of cultivated land, explores the future construction land expansion in this area and its potential threat to the quantity and quality of cultivated land.It is suggested to apply the results of agricultural land grading to the formulation of the overall land use planning, Carry out quality evaluation and adjust the land planning plan to reduce the impact of construction land expansion on the quantity and quality of cultivated land from the source so as to make some contribution to the protection of cultivated land and effectively guarantee the food security in our country.