Spatio-temporal evolution analysis of ecological
security and food security coupling in the Three Gorges Reservoir Area
(Chongqing Section)

Abstract

Abstract:

Ecological security is the guarantee of food security. Food security is an essential component of ecological security. Weighing the coordination relationship between ecological security and food security has become a major issue that our government must effectively solve. We take the Three Gorges Reservoir Area (Chongqing section) as the research object. First, we constructed the evaluation index system of ecological security and food security to analyze spatio-temporal pattern. Second, we used the coupling coordination model and relative development model to analyze the coupling and coordinated development of ecological security and food security. Finally, we calculate the grey correlation coefficient of each index factor to analyze the impact of each index on the ecological security system and food security system. The results demonstrate that: (1) from 2000 and 2020, the ecological safety coefficient of the Three Gorges Reservoir Area (Chongqing section) showed an “upward-declining” trend from 0.41 to 0.38, and the food security coefficient showed a “downward-increasing” trend from 0.36 to 0.31. (2) From 2000 to 2020, the grey correlation coefficient between ecological security and each index in the Three Gorges Reservoir Area (Chongqing section) showed an increasing state, namely, the degree of correlation between the system and each factor gradually increased. (3) From 2000 to 2020, the proportion of antagonistic period in the Three Gorges Reservoir area (Chongqing section) was between 27.27%-36.36%, the running-in period was between 54.55%-68.18%, and the coordination period was between 0-18.18%.

Key words: Three Gorges Reservoir Area (Chongqing Section), ecological security, food security; coupling coordination

摘要： 生态安全是粮食安全的保障，粮食安全是生态安全的重要内容。权衡生态安全与粮食安全的协调关系成为我国政府必须切实解决的重大问题。本文以三峡库区（重庆段）为研究对象，首先，通过构建生态安全与粮食安全评价指标体系，测算各指标因素的综合评价指数，剖析生态安全和粮食安全时空格局及变化规律；其次，引入耦合协调模型和相对发展模型，分析研究区生态安全与粮食安全耦合协调发展状况及时空演变，探究生态安全与粮食安全耦合协调发展路径。最后，测算三峡库区（重庆段）各指标因素的灰色关联系数，分析各个指标对生态安全系统和粮食安全系统的影响程度。主要结论如下：（1）2000-2020年间，三峡库区（重庆段）的生态安全系数呈“上升-下降”的波动下降趋势，由0.41下降到0.38，粮食安全系数呈“下降-上升”的波动下降趋势，由0.36下降到0.31。（2）2000-2020年三峡库区（重庆段）生态安全与各个指标的灰色关联系数均呈现递增状态，表示系统和各要素之间的关联程度逐渐增大。（3）2000-2020年间，三峡库区（重庆段）拮抗期占比在27.27%-36.36%间，磨合期在54.55%-68.18%间，协调期在0-18.18%间。生态安全滞后于粮食安全占比在0-50%，同步于粮食安全在27.27%-45.45%间，超前于粮食安全在22.73%-95.45%间。

关键词: 三峡库区（重庆段）, 生态安全, 粮食安全, 耦合协调

PENG Guochuan, CAO Jiameng, SHEN Na, GUAN Dongjie.

Spatio-temporal evolution analysis of ecological security and food security coupling in the Three Gorges Reservoir Area (Chongqing Section) [J]. Resources & Industries.

彭国川, 曹佳梦, 沈娜, 官冬杰. 三峡库区（重庆段）生态安全与粮食安全耦合时空演变分析[J]. 资源与产业.

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Spatio-temporal evolution analysis of ecological security and food security coupling in the Three Gorges Reservoir Area (Chongqing Section)

三峡库区（重庆段）生态安全与粮食安全耦合时空演变分析

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