基于一维水动力模型的句容河设计洪水推求方法研究OA

As a major tributary of the Qinhuai River and a key drainage channel in Jurong City,the Jurong River has faced increasing flood risks in recent years due to extreme weather events,posing a serious threat to regional flood control safety.To scientifically assess the flood control capacity of the Jurong River basin under extreme rainfall conditions,this study employs a one-dimensional hydrodynamic model,integrating historical hydrological observations and planning results,to estimate the design flood for the Jurong River and its major tributaries.The results show that under the"50-year return period rainfall+91·7-year tidal level"scenario,the water level of the main course of the Jurong River rises gradually from upstream to downstream,exhibiting a significant backwater effect.Raising the flood control standard will significantly increase the flood discharge pressure,and it is necessary to enhance the river's regulation capacity simultaneously.The engineering measures such as embankment reinforcement and channel dredging are proven effective in reducing high water levels and controlling flood peak flows.However,sedimentation in certain river sections has led to higher actual water levels compared to planned values,and it is suggested to carry out targeted dredging and section maintenance.Among the existing plans,the Recommended Scheme of the Qinhuai River Basin Water Management Plan demonstrates better adaptability and guidance value,and it is recommended to be used as the key reference for subsequent engineering design and management.The study results can provide technical support for the assessment of flood control standards for the Jurong River basin and the layout of engineering works.