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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Extreme events, natural variability and climate change : Construction of a one-dimensional model for the cavaillon river, haiti, from an in-situ survey of th...
Construction of a one-dimensional model for the cavaillon river, haiti, from an in-situ survey of the bathymetry
Author : ADERMUS JOSEPH (1), OLIVER CARLIER DĄŻODEIGNE (2), YVES ZECH(3), NYANKONA GONOMY(4) & SANDRA SOARES-FRAZÃO(5)
ABSTRACT
The definition of the bathymetry of a natural river is a key element in the modelling of flows in a natural river. In areas
where detailed topographic and bathymetric surveys are available, the construction of a hydraulic model might appear as a
very simple task. However, in the case of the Cavaillon River in Southern Haiti, only very limited data are available, and the
only DTM currently available has a 30 m resolution, which is not sufficient considering that the width of the minor bed is
about 20 m. In this context, this paper presents the in-situ survey carried out in order to establish a one-dimensional model
for the river that could be used for flood modelling purposes. Indeed, the Cavaillon River presents an uncertain behavior
leading to serious management problems and flood risks with significant potential damage to local populations. The
considered river reach starts from the Dory spillway and goes up to the confluence of the Cavaillon river and the Boulmier
river (25 km). Section surveys were conducted regularly along the river and combined with sparse topographic data
treated using open-source geographic information systems in order to finally propose a realistic one-dimensional model of
the river. This in-situ work is then followed by a first 1-D steady flow modeling using the available data and an estimation of
the bed roughness. The results will be compared where possible to in-situ measurements of the water level.
File Size : 3,222,518 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Extreme events, natural variability and climate change
Date Published : 20/08/2015
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