基于PSR模型的水土流失区生态经济系统耦合研究——以朱溪河流域为例  

Research of coupling of eco-economic systems of soil erosion regions based on the PSR model——A case study of Zhuxi River Basin

作　　者：毕安平[1] 朱鹤健[2] 

机构地区：[1]闽江学院地理科学系,福州350108 [2]福建师范大学自然资源研究中心,福州350007

出　　处：《中国生态农业学报》2013年第8期1023-1030,共8页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金项目(40871141);福建省教育厅项目(JB12149)资助

摘　　要：本研究利用2000年和2009年两期社会经济和自然地理数据,建立了朱溪河流域生态经济系统PSR模型,并采用熵权法为指标体系确权;利用压力、状态、响应、综合发展水平和耦合协调度等指标,分析了流域生态经济系统演化态势和主要驱动因素。结果表明:(1)压力指标呈不均衡变化,得分从80.0微降为79.0;系统状态改善明显,人类响应积极,得分分别从70.9和67.5上升到94.0和87.5;综合发展水平快速上升(得分从66.1上升为93.6)且空间差异缩小(变异系数从0.07缩小为0.05),耦合协调程度下降(得分从92.7下降为83.8)且空间差异有所扩大(变异系数从0.09扩大为0.19),表明流域生态经济系统演化迅速但还没有实现系统耦合协调。(2)种植业比重、非农收入、耕地面积、人口流出、土地流转、纯收入和水土保持投入等关键因子控制着流域生态经济系统演化;压力、响应因子是系统耦合协调的主要影响因子,状态因子则是系统综合发展水平的主要影响因子;这些影响因子是人为调控关键着力点。(3)流域生态经济系统正从高水平不稳定状态向高水平稳定状态过渡,处于"系统重建"向"系统耦合"演进的阶段。The coupling of eco-economic system is a systematic project in region with soil erosion.The system coupling,harmony,rebalancing and self-evolution can be achieved by reducing system pressure,improving system state and enhancing positive human response.Using data from the fields of social economy and physical geography for 2000 and 2009,the Pressure-State-Response model and the entropy weighted indicator system of coupling evaluation were established to analyze eco-economic evolution conditions,primary driving factors and evolution phases of eco-economic system in Zhuxi River Basin（ZRB）.The results revealed that：（1） The eco-economic system of ZRB was represented by slight fall in pressure and coupling,significant improvement in state and aggrandizement of human response.The observed average scores in 2000 and 2009 were 80.0 and 79.0 for pressure,92.7 and 83.8 for coupling,70.9 and 94.0 for state,67.5 and 87.5 for response and 66.1 and 93.6 for integrated development,respectively.Also obvious spatial differences were noted among villages,which were characterized by increasing coefficients of variations of 0.08 and 0.21 for pressure,0.07 and 0.11 for response and 0.09 and 0.19 for coupling in 2000 and 2009,respectively.Decreasing coefficients of variation among villages of 0.09 to 0.06,and 0.07 to 0.05 were noted respectively for state and integrated development.There degree of disequilibrium existed between the level of integrated development and degree of coupling in the region.This suggested an uneven development in ZRB during 2000—2009.The system therefore was not at the self-evolution phase and human intervention needed improvement.（2） The evolution processes of the eco-economic system were controlled by factors such as non-agricultural income,crop farming proportion,arable land area,population migration,net income,investment in soil conservation.These factors constituted the focal point of systematic regulation and control.（3） The eco-economic system of ZRB was either in the late transition

关 键 词：水土流失区 生态 经济系统 PSR模型 系统耦合 演化态势 驱动因素 朱溪河流域 

分 类 号：X24[环境科学与工程—环境科学] S181[农业科学—农业基础科学]