Water resources security evaluation model based on grey relational analysis and analytic network process: A case study of Guizhou Province

Abstract

The complex water resource security system is composed of natural, social and economic factors. In this research, the security evaluation index system and grade were established from the perspectives of water supply security, social security, economic security and ecological security. On this basis, the Analytic Network Process (ANP) was used for the weight calculation of the main influencing factors of water resource security evaluation, and the Grey Relational Analysis (GRA) was combined to establish the water resource security evaluation model to evaluate and analyze the security status of water resources from 2008 to 2018 in Guizhou. The results showed that the water resource security from 2008 to 2018 in Guizhou Province was relatively stable within relative secure status and critical secure status. The security level showed a steadily rising trend, and gradually stabilized in the later period, which belonged to a relative secure status. The evaluation result was consistent with the actual situation. The GRA-ANP-based water resource security evaluation model can effectively analyze the uncertain relationship and interplay among the evaluation factors and provide more complete decision-making information for water resource security evaluation, making the evaluation process more reasonable. The research can provide certain theoretical basis and reference for the research of water resource security evaluation methods.