基于PSR模型与物元模型的土地生态安全评价——以湖北省大冶市为例

发布时间：2018-04-10 10:54

本文选题：土地生态安全 + 物元分析　；参考：《江苏农业科学》2017年05期

【摘要】：以湖北省大冶市为例,运用"压力-状态-响应"模型构建土地生态安全指标体系,熵权法确定指标权重,PSR模型与物元方法相结合评价资源枯竭型城市土地生态安全现状和发展趋势。结果表明:(1)基于PSR模型的指标体系能够更准确地表明系统各要素之间的关系,物元分析方法能揭示单个评价指标的分异信息和综合评价结果的中间信息,PSR模型与物元方法的结合能更好地评价土地生态安全。(2)1996—2010年湖北省大冶市土地生态安全水平较低,呈现"M"形发展趋势,等级关联度较弱有下降趋势;(3)建设用地占用耕地面积比重、人均生活用水量、单位土地面积废水排放量、水土协调度等指标对湖北省大冶市土地生态安全水平提升有很大的影响;结合大冶市土地利用现状,要积极开展农村土地整治,减少建设用地占用耕地面积,提高水土协调度,规划工矿废弃地复垦,促进土地生态系统安全状况改善。
[Abstract]:Taking Daye City of Hubei Province as an example, the index system of land ecological security is constructed by using "pressure-state-response" model.PSR model and matter-element method are combined to evaluate the present situation and development trend of land ecological security in resource-exhausted cities.The result shows that the index system based on PSR model can show the relationship between the elements of the system more accurately.The combination of PSR model and matter-element method can reveal the differentiation information of a single evaluation index and the intermediate information of the comprehensive evaluation result. It can better evaluate the land ecological security. The level of land ecological security in Daye City, Hubei Province from 1996 to 2010 is lower.There is a trend of "M" shape development, and the grade correlation degree is weak, and there is a downward trend. (3) the proportion of cultivated land occupied by construction land, the per capita water consumption, the discharge of wastewater per unit land area, the proportion of cultivated land area occupied by the construction land,The degree of soil and water coordination has a great influence on the improvement of land ecological security level in Daye City, Hubei Province, combining with the present situation of land use in Daye City, it is necessary to actively carry out rural land regulation, reduce the area occupied by construction land, and improve the degree of soil and water coordination.Planning for reclamation of industrial and mining wasteland to promote the improvement of land ecosystem safety.
【作者单位】：武汉大学资源与环境科学学院;武汉大学地理信息系统教育部重点实验室;
【基金】：国家科技支撑计划(编号:2012BAH28B02)
【分类号】：F301.2;X826

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