【作者】 邱氚；

【导师】 冉瑞平；

【作者基本信息】 四川农业大学 ， 土地资源管理， 2010， 硕士

【摘要】 当今社会,土地资源成为了人类生存和发展不可或缺的物质基础。但土地资源的利用强度随着社会经济的快速发展以及人类各种各样的活动而日趋加重,土地的生态环境也日益被破坏。因此,土地的生态安全逐渐被提上研究日程,土地生态安全的研究也成为当前研究的一个较为重要的前沿课题。虽然土地生态安全的相关研究不断深入,但目前仍处于研究的初级阶段,相关的研究还不是很多,土地生态安全评价的理论还处于探索阶段,评价指标体系、方法仍是研究中的难点问题。本研究以成都市为研究区域,对其自然环境概况、社会经济环境状况及土地利用状况进行了相关分析研究。在前人研究成果基础上,结合土地生态安全现状,构建了成都市土地生态安全评价指标体系,运用改进熵值法、多目标综合评价法和协调度模型,对土地生态安全状况进行了评价研究。在此基础上,从土地自然、社会、经济和环境等四方面因素,探讨了提高成都土地生态安全的对策与建议。本研究通过相关分析得出的主要结论有如下几方面：(1)1998—2007年十年间,成都土地生态安全综合值总体呈上升趋势,说明土地生态安全状况呈变好趋势,但变化幅度较小(2)在成都土地生态安全各子系统中,土地经济生态安全对成都土地生态安全状况影响最大,其权重为0.3201,说明经济因素在土地生态安全中起着非常重要的作用；土地社会生态安全、土地环境生态安全和土地自然生态安全对成都生态安全状况的影响程度依次降低。(3)在成都土地生态安全系统中,四个子系统之间的协调关系不稳定,十年间协调系数上下波动变化,其协调系数呈总体减弱趋势。(4)针对目前成都市面临的主要土地生态安全问题,应从自然、社会、经济和环境等四方面因素探讨提高成都土地生态安全的对策与建议。更多还原

【Abstract】 Now in the society, the land resource has become the indispensable material base to human survival and development. Along with fast development of social economy as well as increase of human activity, the use intensity of land resource aggravates day by day,the land ecological environment is also destructed day by day. Therefore, the land ecological security is proposed on the program of syudies gradually, the related research also become a more important front topic. Although the related research of land ecological security is unceasingly thorough, the related research is not many at present, it is still in the initial stage of research. The theory of land ecological security appraisal is also at the exploration stage, the evaluating indicator system and method are still difficult questions in the research.This research that takes Chengdu as the studied region has conducted the correlation analysis research for its natural environment survey, the social economy environment condition and the land utilization condition. On the base of the predecessor research results foundation, the Chengdu land ecological security appraisal target system is conducted according to land ecological security present situation, this study evaluates the condition of the land ecological security by using the utilization improvement entropy value, the multi-objective quality synthetic evaluation and harmonious cooperation scheduling model. In this foundation, this study discusses the countermeasure and the suggestion that can enhance the land ecological security in Chengdu from the land nature, the society, the economy and the environment and so on four aspect factors.This research has the following several respects through the main conclusion that relevant analysis draw:First, the land ecological security synthesis value in Chengdu overall assumes the trend of escalation during ten years that are 1998-2007 year, explained the land ecological security condition assumes improves the tendency, but the change scope is extremely small.Second, in the land ecological security various subsystems in Chengdu, the influence which the land economical ecological security whose weight is 0.3201 has on land ecological security condition in Chengdu is the biggest, this explains the economic agent is playing the extremely vital role in the land ecological security, the influences which the land society ecological security, the land environment ecological security and the land natural ecological security have on the ecological security condition in Chengdu reduces in turn.Third, in the land ecological security system in Chengdu, the harmonious relations between four factors of ecological security are unstable, the coordinate coefficient has been fluctuating change for ten years and its coordinate coefficient is finally weaken.Fourth, this research discusses the countermeasure and the suggestion which can enhance the land ecological security in Chengdu from the nature, the society, the economy and the environment and so on four aspect factors in connection with the main land ecology questions that the Chengdu city faces at present.更多还原