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### 基于网络DEA及SNA模型的中国水资源-能源-粮食纽带系统效率研究

1. 1.辽宁师范大学地理科学学院,大连 116029
2.教育部人文社会科学重点研究基地,辽宁师范大学海洋经济与可持续发展研究中心,大连 116029
3.辽宁省“海洋经济高质量发展”高校协同创新中心,大连 116029
• 收稿日期:2021-09-13 接受日期:2022-01-24 出版日期:2022-07-10 发布日期:2022-07-07
• 通讯作者: 孙才志（1970-）,男,山东烟台人,教授,博士生导师,研究方向为水资源经济与海洋经济。E-mail: suncaizhi@lnnu.edu.cn
• 作者简介:郝帅（1992-）,男,河南安阳人,博士研究生,研究方向为资源环境与区域可持续发展。E-mail: haoshuai0914@126.com
• 基金资助:
国家社会科学基金重点项目(19AJY010)

### Water resources-energy-food nexus system efficiency in China based on network DEA and SNA model

HAO Shuai1(), SUN Caizhi2,3()

1. 1. School of Geography, Liaoning Normal University, Dalian 116029, Liaoning, China
2. Key Research Base of Humanities and Social Sciences of the Ministry of Education, Center for Studies of Marine Economy and Sustainable Development, Liaoning Normal University, Dalian 116029, Liaoning, China
3. University Collaborative Innovation Center of Marine Economy High-Quality Development of Liaoning Province, Dalian 116029, Liaoning, China
• Received:2021-09-13 Accepted:2022-01-24 Published:2022-07-10 Online:2022-07-07

Abstract:

The research on the efficiency of water-energy-food (WEF) nexus system is of great significance to improve the efficiency of comprehensive utilization of regional resources. This paper constructs the WEF nexus system efficiency evaluation index system, measures the WEF nexus system efficiency of 30 provincial-level regions (hereafter province) in China from 1997 to 2019 by using the network DEA model. The Granger causality test method based on the VAR structure framework transforms the "attribute data" of WEF nexus system efficiency into "relationship data", and then uses the social network analysis (SNA) method to analyze the spatial correlation network structure characteristics of China's inter-provincial WEF nexus system efficiency. The results show that: (1) the overall efficiency of China's inter-provincial WEF nexus system shows an upward trend. In terms of spatial distribution, the efficiency of China's WEF nexus system shows a gradual decreasing trend from east to west and from coastal to inland areas. The spatial difference is obvious. The overall efficiency is characterized as eastern region > central region > western region, with significant spatial imbalance. (2) The spatial correlation of the efficiency of China's inter-provincial WEF nexus system presents a complex network structure as a whole. All the provinces are in the spatial correlation network, and the network has significant stability and connectivity. The characteristics of individual network structure show that eastern China is an agglomeration area of spillover effect, which plays a key node role in the network structure of WEF nexus system efficiency, while the central and western regions, which are in a marginal position in the network structure, mainly benefit from the effect. (3) Block model analysis showed that the numbers of "net spillover" plate, "two-way spillover" plate, "net benefit" plate and "broker" plate are 10, 6, 8 and 6, respectively. The "net overflow" plate and the "two-way overflow" plate play a leading role in the network structure, and the "net overflow" plate plays an "engine" role in improving the efficiency of China's WEF nexus system, most of them are concentrated in eastern China, and the "net benefit" plate is concentrated in central and western China, which is in a marginal position in the network, while the "broker" plate plays an intermediating and bridging role in the network structure.