基于DPSIR模型的重庆市土地资源可持续承载力评价

Assessment of Chongqing Land Resources Sustainable Carrying Capacity Based on DPSIR Framework

根据重庆市经济社会发展特点和土地资源利用现状,构建了包括驱动力、压力、状态、影响和响应的5个子体系和23个单项指标在内的重庆市土地资源可持续承载力评价的DPSIR模型,并采用熵值法对各层次指标进行赋权,综合评价了重庆市土地资源承载力的动态变化。结果表明：2002-2009年重庆市土地资源承载力综合指数呈上升趋势,从2002年的2.06到2009年的2.73,增长了33%,说明重庆市土地资源可持续承载力水平在逐渐提高;根据综合指数值大小,重庆市土地资源可持续承载力水平排序为2008〉2009〉2007〉2005〉2004〉2003〉2006〉2002。

Based on economic social development characteristics and land resources utilization situation of Chongqing, a DPSIR model evaluating Chongqing land resources sustainable carrying capacity was established with five subsystems of driving force, pressure, state, effect and response as well as 23 indexes. The entropy method was used to determine the weight of every index and evaluate the dynamic change of Chongqing land resources carrying capacity comprehensively. The results showed that the synthetic index of Chongqing land resources carrying capacity increased progressively during 2002-2009, and it increased by 33% from 2.06 in 2002 to 2.73 in 2009, which indicated that the sustainable carrying capacity of land resources increased in Chongqing. The descending order of Chongqing land resources carrying capacity arranged by synthetic index values was： 2008〉2009〉 2007〉2005 〉2004 〉2003〉 2006〉 2002.