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Estimation and calibration of Manning’s roughness coefficients for ungauged watersheds on coastal floodplains
Knowledge of hydrodynamic behaviour is imperative for the water resource management and the sustainable development of basins. Hydraulic and hydrologic modelling are essential tools for the simulation of this behaviour. However, lack of basin assessment makes modelling input data scarce. This is the case for the Juqueriquere River basin, which comprises the major floodplains of the northern coastline of Sao Paulo State, Brazil. This region is susceptible to floods and is under pressure from real estate speculation, gas exploitation, and infrastructure development for port facilities. The purpose of this study was to estimate and calibrate Manning’s roughness coefficients of the Juqueriquere River basin, as they are mandatory data for hydraulic modelling. The estimation of Manning's n values was based on field observations. These data were inserted into the Hydrologic Engineering Center's River Analysis System (HEC-RAS) model for the calibration of the roughness coefficients in a trial and error process. The findings of this study proved that the estimation and calibration methods were efficient, with mean absolute deviations lower than 10% in the studied sections.
Estimation and calibration of Manning’s roughness coefficients for ungauged watersheds on coastal floodplains
Knowledge of hydrodynamic behaviour is imperative for the water resource management and the sustainable development of basins. Hydraulic and hydrologic modelling are essential tools for the simulation of this behaviour. However, lack of basin assessment makes modelling input data scarce. This is the case for the Juqueriquere River basin, which comprises the major floodplains of the northern coastline of Sao Paulo State, Brazil. This region is susceptible to floods and is under pressure from real estate speculation, gas exploitation, and infrastructure development for port facilities. The purpose of this study was to estimate and calibrate Manning’s roughness coefficients of the Juqueriquere River basin, as they are mandatory data for hydraulic modelling. The estimation of Manning's n values was based on field observations. These data were inserted into the Hydrologic Engineering Center's River Analysis System (HEC-RAS) model for the calibration of the roughness coefficients in a trial and error process. The findings of this study proved that the estimation and calibration methods were efficient, with mean absolute deviations lower than 10% in the studied sections.
Estimation and calibration of Manning’s roughness coefficients for ungauged watersheds on coastal floodplains
Boulomytis, Vassiliki Terezinha Galvao (author) / Zuffo, Antonio Carlos (author) / Dalfré Filho, José Gilberto (author) / Imteaz, Monzur Alam (author)
International Journal of River Basin Management ; 15 ; 199-206
2017-04-03
8 pages
Article (Journal)
Electronic Resource
English
Calibration of Manning's Roughness for a River Reach
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Identification of Manning's Roughness Coefficients in Shallow Water Flows
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Identification of Manning's Roughness Coefficients in Shallow Water Flows
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Guide for selecting Manning's roughness coefficients for natural channels and flood plains
| UB Braunschweig | 1989