广州市土地利用结构优化配置及其潜力

基于广州市土地利用结构、地区经济、生态与社会特点，结合广州城市总体规划(2010-2020)，对广州市域土地利用结构进行生态经济效益-自然生态效益导向的多目标优化配置研究。结果表明：对广州市土地利用数量结构进行调整，一定时间内能够满足地区可持续发展；但是，土地仍然承担着巨大的压力，焦点是建设用地和农用地之间的数量转变，以耕地为主，也包括对未利用土地的利用；土地利用潜力度模型结果显示，通过优化土地利用结构，土地系统的协调度增大而潜力度减小：在生态经济效益目标下，潜力度分别为0.628～0.661，0.372～0.339；在自然生态效益目标下，分别为0.531～0.782，0.469～0.218，表明土地利用系统将趋于更高的协调状态，而其数量结构优化配置的潜力减小，优化各产业部门内部土地资源结构及其空间布局，将是广州市土地资源高效集约利用和进一步挖潜的主导方向。

The Optimal Allocation of Land Use and Its Potential Appraisal in Guangzhou City

The optimal allocation of land use in Guangzhou city was carried out by a linear planning model with multi-objective under the restriction of economic and ecological efficiency. The results indicated that optimal land-use pattern could meet the demands of land use for different departments while the plan to be implemented up to 2020. Currently, the quantitative limitation of land resources exerts tremendous stress on regional land use. The key problem lies in the contradiction between built-up land and agricultural land, especially farmland, in Guangzhou. Potential appraisal model of land use was used to assess the land-use system. The results showed that land-use system tends to be in a highly harmonious status, indicating that the potential of regional development could be lower. On the other hand, the urban land-use system would have no enough space for further development, but it could be improved by optimizing structure allocation. The optimal land-use pattern is the basis for regional sustainable development, and the integrated development among urban areas, suburban areas and industries is the major way to obtain a high regional land-use efficiency.