基于物元分析法的武汉市土地资源安全评价

Application of matter-element analysis for evaluating land security in Wuhan

基于土地资源安全概念,建立评价指标体系并采用组合赋权法构建土地资源安全评价指标权重,应用物元分析法对武汉市土地资源安全状况进行评价.首先选择土地质量、社会经济等指标因子构建土地资源安全评价指标体系;其次建立经典域和节域矩阵;最后计算指标的关联度和综合关联度,获得评价结果.结果表明,2002年至2009年间,武汉市土地资源安全整体上处于转化上升阶段,安全状况有较高提升,但经济密度、耕地压力指数、农药和化肥使用强度及路网密度始终是武汉市土地安全水平的制约因素.

Land resource security is an important component of national security,just as global-warming and urbanization are focused widely,land resource security becomes one of the global issues.This paper is based on the concept of food security to build index system,applying combination weighting method to build food security evaluation index system,and using matter-element analysis to evaluate food security in Wuhan.First,choosing land quality,climate factors,society and economic factors to establish index system;Second,using the data of Wuhan to determine the classical field and the controlled field by relevant standards;At last,calculating correlation degree and integrated incidence degree to determine the grade of food security in Wuhan.The results indicated that the land resource security of Wuhan was in the stage of ascendant conversion from 2002 to 2009,the degree of safety was better,but the economic density,density of road network,land pressure index and intensity of pesticide and fertilizer using were the restraining factors always.