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        Turbid Density Current Venting through Reservoir Outlets

        Fong-Zuo Lee,Jihn-Sung Lai,Yih-Chi Tan,Chia-Chi Sung 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.2

        The planning and design of an outlet operation by releasing a turbid density current from a reservoir requires accurate prediction ofoutflow concentration for sluicing sediment through outlet structures. This study investigates outflow concentration and ventingefficiency through reservoir outlets in a reservoir sluicing operation related to turbid density current. A 3D numerical model isemployed to simulate a venting operation for a turbid density current in typhoon-induced flood events. A simple and efficientformula derived from theoretical analysis with experimental data is proposed for estimating outflow concentration and ventingefficiency. By adopting the proposed formula to avoid time-consuming calculation using the 3D numerical model, the estimatedoutflow concentration and venting efficiency through reservoir outlets have shown good agreement with the measured and simulatedresults in typhoon flood events. This demonstrates that the formula provides an efficient approach for engineering practice in realtimereservoir venting operations.

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