Conference proceeding
Hydro- and morphodynamics tracking of the evolution of a culvert-attached scour hole
River Flow 2012, Vols 1 and 2, pp.341-346
01/01/2012
Abstract
Culverts are commonly used to pass roads over small streams. The design discharges used for sizing culverts exceed several times those for normal flow conditions; therefore, the culvert cross-section is usually is much larger than the cross-section of the stream in typical flows. The stream is connected with the culvert through channel transitions, respectively, an expansion and contraction set immediately upstream and downstream the culvert. These non-uniform flow areas created in the vicinity of the culvert are prone to localized erosion-deposition processes commensurate with the change in the geometry of the culvert vicinity. This paper reports experiments aimed at quantifying changes in the hydrodynamics and morphodynamics characteristics of the area exposed to maxim erosion upstream of a three-box culvert. The development of the scour hole was dynamically measured by an acoustic Multiple Transducer Arrays (MTA). Velocities and turbulence characteristics within the scour hole were tracked over the same time period with acoustic Doppler Velocimetry (ADV) up to attaining the equilibrium of the scour hole. The scour geometry, time-averaged velocities, and Reynolds stress reported in the paper document the interplay between the hydrodynamics and morphodynamics during scour hole formation. The main observation of the analysis of the flow structure reveals that the near-bed time-averaged velocities and Reynolds stress continuously reduce their magnitude as the scour hole develops its final shape.
Details
- Title: Subtitle
- Hydro- and morphodynamics tracking of the evolution of a culvert-attached scour hole
- Creators
- H-C Ho - Univ Iowa, IIHR Hydrosci Engn, Iowa City, IA 52242 USAA. Firoozfar - Univ Iowa, IIHR Hydrosci Engn, Iowa City, IA 52242 USAM. Muste - University of Iowa
- Contributors
- R M Munoz (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- River Flow 2012, Vols 1 and 2, pp.341-346
- Publisher
- Taylor & Francis
- Number of pages
- 6
- Language
- English
- Date published
- 01/01/2012
- Academic Unit
- IIHR--Hydroscience and Engineering; Geographical and Sustainability Sciences
- Record Identifier
- 9984460333602771
Metrics
1 Record Views