湖南省土地生态安全评价研究
发布时间：2018-07-15 21:23
【摘要】：近年来,随着社会经济的飞速发展,人类对土地资源的超负荷开发和利用,致使人地矛盾日趋突出,土地生态安全问题日趋严重。如何保持土地资源的可持续开发和利用已成为人类社会可持续发展面临的新课题。科学的评价土地生态安全,并在此基础上制定合理的政策以指导实践无疑具有重要的理论与实践意义。本课题以湖南省为研究对象,以土地生态安全相关理论为指导,在DPSIR(驱动力—压力—状态—影响—响应)概念模型框架下,选取31个相关指标,构建了湖南省土地生态安全评价指标体系。在此基础上,并运用熵权法对评价指标进行客观赋权,采用模糊综合评价法计算湖南省2005—2015的土地生态安全综合值。参考湖南省“十三五”规划的生态目标(2020年目标值),确定湖南省土地生态安全等级标准。评价结果显示,经济密度、城镇登记失业率、单位耕地面积地膜使用量、森林覆盖率、工业固体废物综合利用率等指标是影响湖南省土地生态安全的主要因素。2005—2015年湖南省土地生态安全状况呈波动向上状态,总体发展趋势良好,土地生态环境子系统在评价期内除压力子系统表现较不稳定之外,其余4个子系统都基本呈波动向上状态。尤其是2007年“两型社会”建设开展以来,湖南省的土地生态安全状况得到了很大的改善,生态安全等级从Ⅱ级上升为Ⅳ级,处于较安全状态。这表明湖南省近年来实施的退耕还林工程、城市绿化工程以及节能减排工程都取得了很好的成绩。最后,本研究针对湖南省土地生态安全方面存在的问题,从经济、法律、行政和技术等方面提出相关建议。
[Abstract]:In recent years, with the rapid development of social economy, the overload of human exploitation and utilization of land resources makes the contradiction between man and land become more and more prominent, and the problem of land ecological security becomes more and more serious. How to maintain the sustainable development and utilization of land resources has become a new subject in the sustainable development of human society. It is undoubtedly of great theoretical and practical significance to scientifically evaluate land ecological security and make reasonable policies to guide practice. This paper takes Hunan Province as the research object, takes the land ecological security theory as the instruction, under the DPSIR conceptual model frame, selects 31 related indexes. The evaluation index system of land ecological security in Hunan Province is constructed. On the basis of this, entropy weight method is used to give objective weight to the evaluation index, and fuzzy comprehensive evaluation method is used to calculate the comprehensive value of land ecological security in Hunan Province from 2005 to 2015. Referring to the ecological target (2020 target value) of the 13th Five-Year Plan of Hunan Province, the grade standard of land ecological security in Hunan Province is determined. The results show that the economic density, urban registered unemployment rate, the use of film per unit cultivated land area, forest coverage, The comprehensive utilization ratio of industrial solid waste is the main factor affecting the land ecological security in Hunan Province. The land ecological security situation of Hunan Province fluctuated upward from 2005 to 2015, and the overall development trend is good. Except for the unstable performance of the pressure subsystem, the other four subsystems were basically fluctuating and upward during the evaluation period. Especially since the construction of "two-type society" was carried out in 2007, the ecological security of land in Hunan Province has been greatly improved, and the ecological security level has been raised from grade 鈪，
本文编号：2125423
[Abstract]:In recent years, with the rapid development of social economy, the overload of human exploitation and utilization of land resources makes the contradiction between man and land become more and more prominent, and the problem of land ecological security becomes more and more serious. How to maintain the sustainable development and utilization of land resources has become a new subject in the sustainable development of human society. It is undoubtedly of great theoretical and practical significance to scientifically evaluate land ecological security and make reasonable policies to guide practice. This paper takes Hunan Province as the research object, takes the land ecological security theory as the instruction, under the DPSIR conceptual model frame, selects 31 related indexes. The evaluation index system of land ecological security in Hunan Province is constructed. On the basis of this, entropy weight method is used to give objective weight to the evaluation index, and fuzzy comprehensive evaluation method is used to calculate the comprehensive value of land ecological security in Hunan Province from 2005 to 2015. Referring to the ecological target (2020 target value) of the 13th Five-Year Plan of Hunan Province, the grade standard of land ecological security in Hunan Province is determined. The results show that the economic density, urban registered unemployment rate, the use of film per unit cultivated land area, forest coverage, The comprehensive utilization ratio of industrial solid waste is the main factor affecting the land ecological security in Hunan Province. The land ecological security situation of Hunan Province fluctuated upward from 2005 to 2015, and the overall development trend is good. Except for the unstable performance of the pressure subsystem, the other four subsystems were basically fluctuating and upward during the evaluation period. Especially since the construction of "two-type society" was carried out in 2007, the ecological security of land in Hunan Province has been greatly improved, and the ecological security level has been raised from grade 鈪，
本文编号：2125423
本文链接：https://www.wllwen.com/shengtaihuanjingbaohulunwen/2125423.html
