关键词: 西部地区, “水—能源—粮食”系统, 安全评价, 障碍因子

Abstract: In 2011, the World Economic Forum identified the worlds lack of understanding of the Water-Energy-Food nexus as a major challenge facing the global economy. Taking 2012—2021 as the time line, Entropy WeightTOPSIS was used to evaluate the security level of the “Water-Energy-Food” system in 11 provinces (autonomous regions and municipalities directly under the Central Government) in western China, and the “Obstacle degree” model was used to identify the obstacle factors in each region and explore the obstacle factors affecting the system security level. The results show that the safety level of the seven regions at present has been on the rise since 2017. According to the average value of the safety level of the provinces, Neimenggu is the safest province in the western region during the study period, followed by Shaanxi and Xinjiang, Sichuan, Guangxi and Qinghai ranked fourth, fifth and sixth respectively, and Yunnan, Ningxia, Gansu, Guizhou and Chongqing ranked the last five in turn. According to the results of obstacle factor identification, the obstacle factors in Yunnan and Ningxia are evenly distributed in the indicators related to water resource security, energy security and food security; the obstacle factors in Guangxi, Chongqing, Sichuan and Xinjiang are mainly water resource security; the obstacle factors in Guizhou are mainly energy security; and the obstacle factors in Neimenggu, Shaanxi, Gansu and Qinghai are mainly food security. Therefore, according to the different resource characteristics and system security levels in different regions, different regions should adjust the relevant mechanisms in a timely manner, promote strengths and avoid weaknesses, and further improve the security level of the “Water-Energy-Food” system.

Key words: the western region, “Water-Energy-Food” system, safety evaluation, obstacle factor