基于组合赋权-TOPSIS的大功灌区水资源安全及障碍因子OA

In order to investigate the status of water resources security and its influencing factors in the Dagong Irrigation District under multi-ple pressures such as climate change,water-use competition and utilization efficiency,an evaluation index system was constructed covering four subsystems:water resources,engineering construction,ecology and socioeconomics.A combined weighting method integrating the Order Relation Analysis Method(G1)method and the CRITIC method was adopted,and the TOPSIS model was used for evaluation.In addition,an obstacle degree model was applied to identify the major obstacle factors affecting the safety status.The results showed that:From 2010 to 2020,the closeness coefficient of water resources security in the irrigation district fluctuated upward from 0.418 to 0.613,and the security level gradually improved from"critical safety"to"relatively safe".The dominant factors constraining water resources security evolved across different stages.In the early stage,the main obstacles were concentrated in the engineering construction subsystem;In the middle stage,the focus shifted to water resources allocation and water-use efficiency;Recently,groundwater over-exploitation emerged as the most significant obstacle fac-tor.Based on these findings,recommendations are proposed including strict control of groundwater over-exploitation,optimization of water allocation among domestic,production and ecological uses,and the enhancement of engineering-based water-saving renovations and refined water management.These suggestions aim to provide references for the sustainable utilization and management of water resources in irrigation districts.