Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Andarvaj, A.

Keshavarz, M. R.

Motamedi, K.

English

Hydraulic Engineering Repository

Conference Paper, Published VersionAndarvaj, A.; Motamedi, K.; Keshavarz, M. R.Numerical Modeling of Sediment Transport in a TypicalLarge Reservoir with Respect to Meander Effects onSediment Flow PathZur Verfügung gestellt in Kooperation mit/Provided in Cooperation with:Kuratorium für Forschung im Küsteningenieurwesen (KFKI)Verfügbar unter/Available at: https://hdl.handle.net/20.500.11970/109791Vorgeschlagene Zitierweise/Suggested citation:Andarvaj, A.; Motamedi, K.; Keshavarz, M. R. (2012): Numerical Modeling of SedimentTransport in a Typical Large Reservoir with Respect to Meander Effects on Sediment FlowPath. In: Hagen, S.; Chopra, M.; Madani, K.; Medeiros, S.; Wang, D. (Hg.): ICHE 2012.Proceedings of the 10th International Conference on Hydroscience & Engineering,November 4-8, 2012, Orlando, USA.Standardnutzungsbedingungen/Terms of Use:Die Dokumente in HENRY stehen unter der Creative Commons Lizenz CC BY 4.0, sofern keine abweichendenNutzungsbedingungen getroffen wurden. Damit ist sowohl die kommerzielle Nutzung als auch das Teilen, dieWeiterbearbeitung und Speicherung erlaubt. Das Verwenden und das Bearbeiten stehen unter der Bedingung derNamensnennung. Im Einzelfall kann eine restriktivere Lizenz gelten; dann gelten abweichend von den obigenNutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte.Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license isapplicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the materialof the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms ofthe restrictive license will be binding.The 10th Int.  Conf. on Hydroscience and Engineering (ICHE-2012), Nov. 4 – Nov. 7, Orlando, USA 157      NUMERICAL MODELING OF SEDIMENT TRANSPORT IN A TYPICAL LARGE RESERVOIR WITH RESPECT TO MEANDER EFFECTS ON SEDIMENT FLOW PATH   A. Andarvaj1, K. Motamedi2, and M.R. Keshavarz3   In the conducted study, a typical large concrete dam, is modeled which will be built on a river with a great amount of flood and sediment yield. The river is located in semi-arid area with significant meanders along its path that induced in massive floods rife with sediment loads. The reservoir is used for hydropower and water supply purposes. The average annual sediment yield is about 1/15 of reservoir active storage and the mean annual discharge of the river is 60 times greater than the reservoir storage capacity; consequently this dam will be in the range of Sluicing and Flushing operation respecting basic classification of reservoirs by Di Silvio, (1996). In order to maintain active storage of the reservoir from sedimentation threat, the steel lined Bottom outlets are considered for flushing. In this research two 1D model which can simulate long-term assumed reservoir Flushing and Sluicing hydraulics is deployed; the GSTARS v.4.0 1D model and HEC-RAS v.4.1. Due to different assumptions developed in these models for sediment transport, bed evolution and reservoir hydraulics simulation, authors tried to test and evaluate the results of using these models for the mentioned reservoir. Strategies which were used for this research are: 1) maintaining reservoir normal water level along with sluicing operation (for both annual discharge and 2 year flood), 2) modeling flushing operation with various flushing discharge and 3) long term sedimentation longitudinal profile evolution for a defined period.  A thorough discussion is made over flushing and sluicing proficiency for this type of reservoirs, investigating the application of sluicing techniques. Results showed that for reservoirs with the assumed conditions either flushing or sluicing will not vary significantly in protecting the active storage from sedimentation threat. Also it was observed from the results that a typical reservoir similar to the current case is much better saved by sluicing operation rather than flushing technic. Another important result which was found is for HEC-RAS v.4.1 that made the authors to conclude that the current model based on the SI system of units cannot predict the desired parameters accurately.                                                   1 M.Sc. Hydraulic Engineer, Mahab Ghodss Consulting Engineering Company, Iran, afshin_andarvaj@yahoo.com 2 PhD.  Hydraulic Engineer, Mahab Ghodss Consulting Engineering Company, Iran, k.motamedi@gmail.com 3 M.Sc.  Student. Hydraulic Structure Eng., Ferdowsi University of Mashhad, Iran, mohammad.r.keshavarz@gmail.com The 10th Int.  Conf. on Hydroscience and Engineering (ICHE-2012), Nov. 4 – Nov. 7, Orlando, USA 158   Figure 1 Basic Classification of reservoirs (Di Silvio, 1996).    Figure 2 Reservoir Longitudinal Profile  REFERENCES  Chih Ted Yang and Jungkyu Ahn. (2011) GSATRS4 User`s Manual, Hydroscience and Training Center, Colorado State University. Nils Reidar B. Olsen. (1999) Computational Fluid Dynamics in Hydraulic and Sedimentation Engineering, Department of Hydraulic and Environmental Engineering, The Norwegian University of Science and Technolog, ISBN 87-7598-041-0 

Numerical Modeling of Sediment Transport in a Typical Large Reservoir with Respect to Meander Effects on Sediment Flow Path

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Numerical Modeling of Sediment Transport in a Typical Large Reservoir with Respect to Meander Effects on Sediment Flow Path

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