Hydraulics & Waterways

Oral

394996 - Assessment of aggradation processes and remediation alternatives using HEC-RAS

Thursday, June 7
8:30 AM - 10:00 AM
Location: Greenway CD

Severe aggradation in bridge structures are a serious issue since it may lead to overtopping episodes during peak flows and increased risk of serious structural damage. Aggradation processes may be caused by changes in watershed land uses, clear-cutting near streams, among others causes. River modeling tools, such as HEC-RAS, are useful in computing characteristics of stream flow, such as velocities and stages, when aggradation processes take place. These models can also be used to assess proposed changes in the stream characteristics to minimize aggradation issues, including stream modification with the objective of increasing flow velocities near the roadway-stream crossing. This work present results of using HEC-RAS 5 to estimate the impacts of aggradation and proposed geometric changes in a stream in Southeast Alabama. Results indicate important impacts of geometric details in the stream flow characteristics, and indeed point to the benefits of using a combined 1D and 2D modeling approaches to evaluate the impacts of stream modifications to reduce aggradation issues.

wenjun shi

Auburn University

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Jose Goes Vasconcelos, PhD

Associate Professor
Auburn University

PhD in Environmental Engineering - University of Michigan, 2005
MSc in Environmental Technology and Water Resources - University of Brasilia, 2000
BS in Civil Engineering - University of Brasilia, 1995
Currently Associate Professor at Auburn University
Member of Editorial Board of the ASCE Journal of Hydraulic Engineering and CHI Journal of Water Management and Modeling
Chair of the ASCE EWRI Hydraulic Structures Committee
Chair of the ASCE EWRI Task Committee in Two-Phase Flow In Urban Water Systems
Member of the ASCE EWRI Computational Hydraulics Committee
Advisor to the Engineers Without Borders Student Chapter at Auburn University

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