中国西部地区水-能源-粮食系统耦合协调度的时空特征

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Abstract Based on the comprehensive development evaluation of water-energy-food system in western China from 2005 to 2018, the spatio-temporal characteristics and influencing factors of the coupling coordination degree of water-energy-food system are empirically studied by using the coupling coordination degree model and geographical weighted regression model. The results show that: (1) The overall development index of the water-energy-food system and its subsystems in western China shows a fluctuating upward trend. Among them, the water and energy subsystems lagged behind the food subsystem for a long time after 2011, becoming the shortcomings of the coupled and coordinated development of the water-energy-food system in the western region. (2) From 2005 to 2018, the coupling coordination degree of water-energy-food system in western China has entered the primary coupling coordination stage from barely coupling coordination, and the coupling coordination degree shows the spatial and temporal characteristics of "high in the south and low in the north". (3) The level of population consumption and population size have a positive influence on the system coupling coordination in northwest China, such as Gansu and Inner Mongolia, and a negative influence on southwest China, such as Chongqing and Yunnan, with the spatial characteristics of " positive in the north and negative in the south ". The degree of influence of local financial investment in environmental protection gradually increases from north to south, and the system coupling coordination degree of Guangxi, Guizhou, Sichuan and Shaanxi is most influenced by this factor. The spatial characteristics of "high in the north and low in the south" are shown in the degree of influence of R&D investment on the system coupling coordination. Based on the results of the above analysis, the study proposes a regional resource management approach under the perspective of joint development of multiple resource systems to reduce the dependence on limited resources among them. Factors such as population size and investment in environmental protection science and technology are improved to build a coordinated development strategy of coupled water-energy-food system with western regional characteristics, reflecting resource advantages and being competitive.

Key words： Western China water-energy-food system coupling coordination influence factors

Received: 22 February 2022

PACS:	X24
	TV213.4
	F326.11

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	ZHANG Ning
	YANG Xiao
	CHEN Tong

Cite this article:

ZHANG Ning,YANG Xiao,CHEN Tong. Research on the coupling coordination of water - energy - food system and its temporal and spatial characteristics[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4444-4456.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I9/4444

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