One-dimensional sediment transport model for the Taiacupeba Reservoir Basin


One-dimensional modeling has been successfully adopted since the 1980s in the engineering practice to estimate long-term sediment transport. It is also an important tool for understanding the sediment dynamics in watersheds and for managing sediments in reservoirs. This paper aims to present a one-dimensional HEC-RAS sediment transport modeling for the Taiacupeba reservoir basin, located in Sao Paulo, Brazil, focused to estimate long-term total loads into the reservoir. The results were skewed low because of drought-like conditions, as data collection period overlapped with the 2013-2015 drought in Southeastern Brazil. Such condition contributed to the critical analysis of the results highlighting the use of one-dimensional sediment modeling as an effective tool for validating sediment rating curves. The Laursen-Copeland and Toffaleti transport capacity functions have been shown to be applicable to this river system, as well as the Active Layer and Exner 7 bed sorting and armoring methods from HEC-RAS. Both the sediment rating curves and Manning coefficients were considered preliminary and additional field sampling at higher discharges are encouraged to enhance model accuracy and better estimate loads.

COSTA, Samuel Barsanelli; ALFREDINI, Paola; RAMOS, Carlos Lloret. One-dimensional sediment transport model for the Taiacupeba Reservoir Basin. In: BRAZILIAN MEETING OF SEDIMENTS ENGINEERING, 13., 2018, Vitória. Proceedings…. 10 p.

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