Risk Identification of Rainstorm and Flood Disasters for Power Facilities

Ye Limei; Zhou Yuehua; Yang Mingwei; Gao Zhengxu; Zhang Huijuan

doi:10.16765/j.cnki.1673-7148.2026.03.010

Abstract：Focusing on the damage to power facilities in Xiaogan City,Hubei Province,caused by the rainstorm on August 12,2021,this study analyzed and quantitatively identified the risk sources of rainstorm and flood disasters for these facilities from the perspectives of hazard factors,disaster-predispo-sing environment,vulnerable entities,and disaster situations,employing methods such as case analysis,WBS-RBS(Work Breakdown Structure-Risk Breakdown Structure),weighted comprehensive evaluation,and scenario simulations using an inundation model.The results are as follows.(1)The flood disasters suffered by Xiaogan power facilities are mainly caused by the combined effects of multiple disaster types such as floods in the upper reaches of the Fuhuan River,local heavy precipitation,and downstream water level uplift.The continuous high water level in the Xiaogan section hinders the drainage of waterlogging in the area,causing slow water withdrawal.(2)Identification of rainstorm hazards can directly indicate that Xiaogan power facilities are in the high-risk area of rainstorm and flood during this heavy rainfall process,which has reference significance in the layout planning of power facilities stations,though further refinement is needed.(3)Submersion simulation can finely and dynamically express the flooding time and water depth evolution of Xiaogan power facilities.Based on the accuracy testing and analysis of the model,the simulation results show that this precipitation process causes a maximum depth of 0.4-2.0 meters of water accumulation near the Yuncheng substation and the Xiaogan urban shutoff area.The water accumulation mainly occurs between 06:00 and 08:00 on August 12.