Study on water resources security and obstacle factors in Guangdong Province based on DPSIR model
Water resources are the basis for human survival and development,and its security has become a major issue of universal concern.Based on the DPSIR model,a water resources security evaluation index system for Guangdong Province isconstructed.This article uses the Analytic Hierarchy Process,Entropy Method,Comprehensive Index Method,and Barri-er Degree Model to study and analyze the water resources security level of Guangdong Province from 2010 to 2020.Research has shown that the overall level of water resource security in Guangdong Province has shown a fluctuating upward trend from 2010 to 2020,mainly influenced by the driving force,pressure,and response subsystems.The average compre-hensive index over the years is 0.50(level Ⅲ),indicating that water resource security is at a basic level of safety.From the perspective of the five subsystems of driving force,pressure,state,influence,and response,the driving force and influence subsystems are not optimistic,while the pressure,state,and response subsystems are showing a continuously improving trend.From the perspective of obstacles,the driving force subsystem has gradually become the main obstacle fac-tor affecting water resource security in Guangdong Province,with low GDP growth rate being the main obstacle indicator factor.Guangdong Province should focus on the main obstacles,spendnoefforts in dynamic management of regional water resources security indicators,and continuously improve the ability to ensure water resources security.
DPSIR Modelwater resources securityoverall evaluationobstacle degreeGuangdong Province