Contact

Bret M. Webb, Ph.D., P.E., D.CE
Professor
University of South Alabama
150 Jaguar Drive, SH3142
Mobile, AL 36688 USA
Phone: (251) 460-6174
Fax: (251) 461-1400
Email: bwebb@southalabama.edu

Research Positions

None available at this time

Current Research Assistants

SE Students
Garland Pennison

 

MSCE Students
Patrick Hautau
Marshall Hayden
Kate Haynes
Justin Lowlavar
Vijaya Satya Lohitha Mukkamala
Jackie Wittmann

 

Undergraduate Students
Derek Kelly
Rh'Monte Wilson

Former Students

MSCE Students
Bryan Groza (2016)
Kari Servold (2015)
Chris Marr (2013)
Richard Allen (2013)
Miyuki Matthews (2012)

 

Post Docs
Jon Risinger
Jungwoo Lee

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Archives

ADCIRC

Fig07 for web site

Our manuscript entitled “Spatial Variability of Hydrodynamic Timescales in a Broad and Shallow Estuary: Mobile Bay, Alabama” has been published by the Journal of Coastal Research. The manuscript is currently available online as a pre-print. The final version with color will be available in the coming months. Please {click on this link} for access to the manuscript.

The results presented in this new manuscript by Webb and Marr (2016) were initially developed as part of Chris Marr’s thesis research back in 2013. This new manuscript presents a much more narrow focus of his work and some new analyses as well. For more information about this work please review the {thesis} by Marr and/or this previous {blog post}.

 

 

NCA 2014 home page link

 

Some of our (me and Dr. Scott Douglass, PhD, PE, DCE) work is featured in the 2014 National Climate Assessment, which was recently released through the US Global Change Research Program web site. Click on the image at right to be directed to the interactive report web site. Our contributions are incorporated into Sectors / Transportation.

 

Since 2010 we have been assisting the US Department of Transportation and ICF International in the Gulf Coast 2 Study focused on the Mobile (AL) area. Our portion of the project was to simulate the effects of climate change on storm surge and waves in Alabama’s coastal counties using advanced hydrodynamic models. These results were used to perform exposure and sensitivity assessments in order to evaluate the vulnerability of transportation systems to storm surge and waves on higher future sea levels. A small portion of this work was incorporated into Sectors / Transportation report of the 2014 NCA. The work has also been specifically referenced in cabinet-level and presidential addresses over the past two years, specifically in response to the damage that Hurricane Sandy caused in New York and New Jersey back in 2012.

 

In light of the significant advances made toward performing exposure and vulnerability assessments during the Gulf Coast 2 Study, FHWA has been supporting the development of a new Hydraulic Engineering Circular (HEC) focused on assessing extreme events. The new manual will serve as a second volume to HEC 25 – Highways in the Coastal Environment. More information can be found on the FHWA climate adaptation web site. I am a co-author of this new manual, along with Dr. Douglass and Mr. Roger Kilgore. The new HEC 25 Volume 2 should be released by FHWA some time in 2014.

 

 

the crew at 5 rivers dock

 

The South Alabama Jag Ski was recently used to map bathymetry and velocity at selected locations in northern Mobile Bay as part of a hydrodynamic model (ADCIRC) study of the area. Bathymetric data were collected in order to update the ADCIRC model mesh and underway velocity profiling was performed for eventual model-data comparison of velocity/discharge and water levels. Areas sampled include:

  • I-10 Cut west of Choccolatta Bay
  • Existing box culverts east of the I-10 / Causeway interchange
  • Pass Picada
  • Apalachee River
  • Sardine Pass
  • Duck Skiff Pass / Justins Bay
  • Blakeley River

 

Pres_Page1

 

One of my graduate students, Chris Marr, recently completed his thesis research on the spatial variability of residence, exposure, and flushing times of Mobile Bay, Alabama. A copy of Chris’ final thesis can be found {here}.

 

I was given the opportunity to present Chris’ research results at today’s 2013 Alabama Water Resources Conference in Orange Beach, Alabama. Click on the image at right for a PDF of the presentation. For those of you that didn’t make it to see the presentation, I narrated a version and have embedded the video below.

 

 

 

*Note: we have modified the results slightly based on recent input from colleagues. The changes generally only affect results in Bon Secour Bay. The narration and presentation show the update results.

 

A number of CE graduate students and faculty are presenting their research at the annual USA Spring Research Forum the week of March 26 – 30, 2012. Research posters are displayed in the lower and upper lobby of the Mitchell College of Business (MCOB). A formal research symposium will be held on Friday, 3/30. The CE posters are on the lower lobby level on boards 17 – 20. Students are encouraged to view the posters to gain an appreciation for the research that USA students, both undergraduate and graduate, and faculty are performing. Some reduced-scale versions of the posters can be found below the corresponding citations that follow. Please contact me if you’d like more information about these or other projects.

 

  • Allen, R.J., B.M. Webb 2012. Wave Attenuation Devices: a Comprehensive Evaluation of Wave Transmission through Physical Modeling. University of South Alabama Spring Research Forum, Poster 20. March 26 – 30, 2012. Mobile, AL.

 

  • Marr, C.D., B.M. Webb 2012. Spatial Variability of Residence Time in Mobile Bay, Alabama. University of South Alabama Spring Research Forum, Poster 19. March 26 – 30, 2012. Mobile, AL.

 

  • Miyuki, M.T., B.M. Webb 2012. Characterizing Wave-Induced Scour Processes in a Transition Zone: a Continuum Model for Equilibrium Scour Depth at Cylindrical Piles. University of South Alabama Spring Research Forum, Poster 18. March 26 – 30, 2012. Mobile, AL.

 

  • Webb, B.M., S.H. Russ, D.B. Martin. 2012. Development of an Enhanced Ocean Drifter. University of South Alabama Spring Research Forum, Poster 17. March 26 – 30, 2012. Mobile, AL.