基于熵权可拓物元模型土地利用系统健康诊断——以河西走廊为例

发布时间：2018-05-18 10:32

本文选题：土地利用 + 可拓物元模型　；参考：《干旱地区农业研究》2017年01期

【摘要】：通过构建PSR模型的指标体系,运用熵权可拓物元模型对河西走廊的土地利用系统健康进行评价。研究结果:2000—2014年这15年期间,根据可拓物元模型经典域取值区间,河西走廊整体土地利用系统健康水平处于N03,健康等级为临界状态,健康水平保持稳定;河西走廊的土地系统健康水平分布具有一定的规律性,呈现出由中间向两边逐渐降低的趋势;河西走廊生态环境脆弱,森林覆盖率、水土流失程度和土壤盐渍化率是制约土地利用系统健康水平提升的重要因素。研究表明,将熵权可拓物元模型应用于土地利用系统健康评价,可以有效地避免人为因素的干扰,客观地评价研究区域土地利用系统健康的各要素之间的关系,揭示各个指标的水平状态,挖掘土地利用系统健康存在的具体问题,适用于土地利用系统健康的评价。
[Abstract]:The index system of PSR model was constructed and the health of land use system in Hexi Corridor was evaluated by using entropy weight extension matter-element model. Results during the 15-year period from 2000 to 2014, the health level of the whole land use system in Hexi Corridor was N03, the health grade was critical, and the health level remained stable according to the classical domain value interval of extension matter-element model. The distribution of healthy level of land system in Hexi Corridor has certain regularity, showing a trend of decreasing gradually from middle to both sides, the ecological environment of Hexi Corridor is fragile, and the forest coverage rate, Soil erosion degree and soil salinization rate are important factors restricting the improvement of land use system health. The research shows that applying the entropy weight extension matter-element model to land use system health evaluation can effectively avoid the interference of human factors and objectively evaluate the relationship between the various elements of regional land use system health. It can be used to evaluate the health of land use system by revealing the level state of each index and excavating the specific problems existing in the health of land use system.
【作者单位】：甘肃农业大学资源与环境学院;
【基金】：国家自然科学基金“村民关联度与农地利用的关系研究”(71263003)
【分类号】：F301.24

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