基于成本收益的灾后重建区耕地保护区位选择

灾后重建区的耕地保护区位选择是保障农村发展、保护生态环境的重要课题。文章运用成本收益论,将直接投入成本、非农化机会成本以及政策成本耦合得出耕地保护投入成本,与潜在收益综合分析后形成了重建区耕地保护区位选择的研究框架,构建了区位选择指标体系。在此框架下,对2008年"5·12"地震中位于重灾区的四川省彭州市进行了实证分析,借助GIS空间分析技术,以行政村为基本评价单元,研究高适宜性的耕地保护空间位置。结果表明,彭州市耕地保护的优选区位主要位于通济镇、新兴镇、磁峰镇、桂花镇、军乐镇、隆丰镇、升平镇、三界镇、敖平镇以及丽春镇、葛仙山镇大部分地区。研究为彭州市补充灾毁耕地、耕地空间重置等灾后重建工作的开展提供科学依据。

Location Choice for Cultivated Land Protection in Post-disaster Reconstruction Area Based on Cost-benefit Theory

Location choice for cultivated land protection in the post-disaster reconstruction area is an important issue for maintaining rural development and protecting the environment. Based on the cost-benefit theory, the paper combined direct input costs, opportunity costs and policy costs into cultivated land input costs, then contrasted it with the potential benefits. The paper comprehensively developed an analytical framework of location choice in post-disaster reconstruction area and constructed a 12-item index system of location choice for cultivated land protection. Taking the severely-afflicted Pengzhou city in Sichuan Province as a case, the paper identified the most suitable location for cultivated land protection during post-disaster period under the framework, using village as an evaluation unit with the help of GIS spatial analysis technique. The results indicate that preferred locations in Pengzhou city are mainly distributed in Tongji Town, Xinxing Town, Cifeng Town, Guihua Town, Longfeng Town, Junle Town, Shengping Town, Sanjie Town, Aoping Town, most parts of Lichun Town and Gexianshan Town, with a total area of 73.5 km². The research provides scientific basis for land replenishment and reallocation during the reconstruction work in Pengzhou city.