IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 3- SEDIMENT MANAGEMENT AND MORPHODYNAMICS : NUMERICAL-EXPERIMENTAL MODELLING OF LOCAL SCOURING DOWNSTREAM OF PROTECTED BRIDGES IN ALLUVIAL RIVER...
NUMERICAL-EXPERIMENTAL MODELLING OF LOCAL SCOURING DOWNSTREAM OF PROTECTED BRIDGES IN ALLUVIAL RIVER BEDS
Author : B. NÁCHER-RODRÍGUEZ , F.J. VALLÉS-MORÁN , A. BALAGUER-BESER , M.T. CAPILLA
Bridges with a protected river bed under the structure suffer a combination of different types of erosion during flood events. Local scour develops upstream piles and abutments. Contraction scour is present due to the narrowing of the cross section. And finally, erosion downstream the protected zone may occur as a result of a change in the riverbed rigidity. These phenomena cannot be separately studied, as their total effect does not equal a simple addition of the single effects. In this paper, an experimental campaign is conducted in order to evaluate how the factors involved in this phenomenon affect total scour and its dimensions. Furthermore, one of the experiments is simulated by means of a hydraulic mathematical model, which incorporates sediment transport equations. Agreement between numerical and experimental results is discussed, alongside the proposal of future model improvements.
File Size : 4,077,739 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 3- SEDIMENT MANAGEMENT AND MORPHODYNAMICS
Date Published : 18/04/2016
Download Now