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Open AccessArticle

River Bathymetry Model Based on Floodplain Topography

1
Department of Water Resources and Environmental Modeling, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamycka 1176, 165 21 Prague 6, Suchdol, Czech Republic
2
Research Institute for Soil and water Conservation, Zabovreska 250, 156 27 Prague 5, Czech Republic
*
Author to whom correspondence should be addressed.
Water 2019, 11(6), 1287; https://doi.org/10.3390/w11061287
Received: 16 April 2019 / Revised: 13 June 2019 / Accepted: 17 June 2019 / Published: 20 June 2019
(This article belongs to the Special Issue Advances in Hydraulics and Hydroinformatics)
An appropriate digital elevation model (DEM) is required for purposes of hydrodynamic modelling of floods. Such a DEM describes a river’s bathymetry (bed topography) as well as its surrounding area. Extensive measurements for creating accurate bathymetry are time-consuming and expensive. Mathematical modelling can provide an alternative way for representing river bathymetry. This study explores new possibilities in mathematical depiction of river bathymetry. A new bathymetric model (Bathy-supp) is proposed, and the model’s ability to represent actual bathymetry is assessed. Three statistical methods for the determination of model parameters were evaluated. The best results were achieved by the random forest (RF) method. A two-dimensional (2D) hydrodynamic model was used to evaluate the influence of the Bathy-supp model on the hydrodynamic modelling results. Also presented is a comparison of the proposed model with another state-of-the-art bathymetric model. The study was carried out on a reach of the Otava River in the Czech Republic. The results show that the proposed model’s ability to represent river bathymetry exceeds that of his current competitor. Use of the bathymetric model may have a significant impact on improving the hydrodynamic model results. View Full-Text
Keywords: DEM; hydrodynamic modelling; river bathymetry; floods; Bathy-supp DEM; hydrodynamic modelling; river bathymetry; floods; Bathy-supp
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MDPI and ACS Style

Bures, L.; Sychova, P.; Maca, P.; Roub, R.; Marval, S. River Bathymetry Model Based on Floodplain Topography. Water 2019, 11, 1287.

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