Research on the water supply dispatching rules of the Sanshiliujiao Lake Reservoir on Pingtan Island

QU Liying; WANG Yuyu; YOU Yanyan

doi:10.3969/j.issn.1000-1123.2025.19.011

Abstract：Pingtan Island is an important comprehensive experimental zone for pioneering policies in the construction of the West Coast Economic Zone.However,due to its hydrological characteristics as an island,precipitation is unevenly distributed in time and space,water retention capacity is weak,and evaporation is strong,leading to prominent water scarcity problems.To meet the water demand of the leapfrog development of the Pingtan Comprehensive Experimental Zone,the Minjiang River Diversion Project in Fuqing and the Water Resources Allocation Project of Pingtan and Minjiang Estuary in Fujian Province have been successively completed and put into operation.As the core hub for water regulation on the island,the Sanshiliujiao Lake Reservoir undertakes key functions such as storing diverted water and supplying water through scheduling,and its scientific operation is crucial for ensuring regional water resource supply.Based on the analysis of regional water resource allocation and supply tasks,the dual requirements of flood control and water supply in the operation of the Sanshiliujiao Lake Reservoir were identified.Guided by the principle of"no overflow under common flood conditions and reliable water storage for supply",water supply scheduling water level lines were established through pre-allocation of flood control storage capacity and tiered water supply operations.Water level thresholds were applied to achieve drought warning and decision-making response.The results show that this scheduling strategy effectively improves the scientific basis,flexibility,and safety of reservoir operation,enhances the reliability of water supply under emergencies and extreme climate conditions,provides a scientific basis for water resource management in the Pingtan Comprehensive Experimental Zone,and offers reference value for water resource management in similar island regions.