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冰川冻土  2012 

基于DPSIR-TOPSIS模型的湖南省土地生态安全评价

, PP. 1265-1272

Keywords: 土地生态安全,DPSIR,改进的TOPSIS,湖南省

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Abstract:

基于DPSIR模型,从驱动力、压力、状态、影响、响应五方面构建湖南省土地生态安全评价指标体系,运用基于熵权的改进的TOPSIS法对2001-2010年湖南省的土地生态安全状况进行评价.结果表明人均GDP、GDP增长率、单位耕地面积农药施用量、单位耕地面积地膜使用量、土地利用率、耕地旱涝保收率、单位耕地粮食产量、单位建设用地,二三产业增加值、农民人均纯收入、经济密度、环保治理投资占GDP比重等指标是影响湖南省土地生态安全的主要因素;湖南省土地生态安全状况整体呈上升趋势,由不安全状态提升到较不安全状态,但距安全状态仍有较大差距;从各子系统看,湖南土地生态安全的驱动力、影响和响应系统的安全状况均呈逐步上升趋势,状态系统也逐步波动上升,但压力系统的安全状况呈逐年下降趋势.

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