Abstract:
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.
Reference:
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.
Document with restricted access. Log in to BiblioInfo, Library/GITEB-IPT to access the PDF text:
https://escriba.ipt.br/pdf_restrito/175464.pdf
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.
Reference:
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.
Document with restricted access. Log in to BiblioInfo, Library/GITEB-IPT to access the PDF text:
https://escriba.ipt.br/pdf_restrito/175464.pdf
