基于能值分析的磴口县土地生态经济系统可持续性研究

发布时间：2018-07-01 15:39

本文选题：土地生态经济系统 + 能值分析　；参考：《西北林学院学报》2017年04期

【摘要】：土地资源是人类社会生存和发展的最基本资源,在生态脆弱的干旱区与荒漠区,土地资源往往因经济发展而受到诸多生态环境压力。因此,对土地生态经济系统的可持续性进行研究具有重要意义。以磴口县为研究区,应用能值分析方法,结合土地利用转移矩阵、动态度等方法,系统研究2003-2015年间的土地生态经济系统可持续性情况。结果表明:1)在磴口县土地生态经济系统内,建设用地系统对土地总体能值影响最大,但建设用地系统自身处于严重的"消费型"系统,可持续性较低,面临较大环境压力。2)研究时段内,磴口县土地系统整体经历了从严重土地沙漠化至沙化被遏制的过程,该结论是从土地利用数据中分析得出,并在能值分析中得到了严密的印证。说明当地积极的沙漠化治理卓有成效。3)研究期内,磴口县土地生态经济系统总体能值投入产出比、土地可持续利用指数均在降低,土地环境负载指数逐步增大。说明研究区的可持续性在该时段内较差,并且未来的可持续性发展也并不乐观,亟需措施来遏制。
[Abstract]:Land resources are the most basic resources for the survival and development of human society. In the ecologically fragile arid areas and desert areas, land resources are often subjected to many ecological environmental pressures due to economic development. Therefore, it is of great significance to study the sustainability of land ecological economic system. Taking Dengkou County as the study area, the sustainability of land eco-economic system from 2003 to 2015 was studied systematically by means of emergy analysis, land use transfer matrix and dynamic degree. The results show that in Dengkou County, the construction land system has the greatest impact on the total energy value of land, but the construction land system itself is in a serious "consumptive" system, and its sustainability is low. During the period of study, the land system of Dengkou County experienced a process from serious desertification to being stopped by desertification. The conclusion was obtained from the analysis of land use data. And in the analysis of the value of energy has been strictly confirmed. The results show that in the period of active desertification control in Dengkou County, the total input-output ratio of land eco-economic system, the index of sustainable land use and the index of land environment load are all decreasing. It shows that the sustainability of the study area is poor in this period, and the future sustainable development is not optimistic, so measures are urgently needed to curb it.
【作者单位】：北京林业大学精准林业北京市重点实验室;恒大地产集团洛阳有限公司;
【基金】：国家自然科学基金(41371189) “十二五”国家科技支撑计划(2012BAD16B00)
【分类号】：F301.24

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