Multifaceted Approach of Assessing Channel Design through Ship Simulations in Mobile Harbor, Alabama
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 147, Issue 5
Abstract
Recently, Mobile Harbor, Alabama, experienced an increase in vessel size and traffic, which resulted in navigation inefficiencies. This prompted a navigation improvement study that included ship simulations to assess proposed modifications to the federal navigation channels. In 2017, the US Army Engineer Research and Development Center (ERDC) ship/tow simulator (STS) was used to complete a feasibility-level screening simulation (FLSS) study. Areas of focus included: a bend easing, a passing lane, and a turning basin. Over the course of 1 week, a variety of proposed designs were screened and subsequently revised. In 2020, the FLSS study databases were used as a foundation for a more robust study. Approximate meeting locations in the passing simulation track plots were differentiated to capture an instant in time. Additional analysis was performed to identify grounding factors in the passing lane. It was determined that the proposed modifications were feasible under certain restrictions. Through this two-pronged approach, a project deficiency was identified early in the process that allowed for revision and rigorous testing of a preassessed channel.
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Acknowledgments
Funding to support this study and its resulting data came from the USACE, Mobile District. The Mobile Bar pilots provided expert elicitation throughout the studies and preformed all simulation tests. Mr. Herb Taylor, from Kongsberg Digital Simulation Inc., provided the vessel models utilized in the studies. We thank Mr. Gary Lynch for creation of the visual databases, Dr. Sung-Chan Kim for creating the numerical currents, the ERDC ship simulator team (Dr. Keith Martin, Ms. Mary Claire Allison, Ms. Kiara Pazan, Ms. Shannon Stever, and Mr. Mario Sanchez) for operating ship simulations, and Ms. Mary Claire Allison for data processing and computer technician assistance.
References
Bunch, B., E. Hayter, S. Kim, E. Godsey, and R. Chapman. 2021. Three dimensional hydrodynamic, water quality, and sediment transport modeling of Mobile Bay. Letter Rep. ERDC/EL-LR-21-3. Vicksburg, MS: U.S. Army Engineer Research and Development Center.
CESAM (U.S. Army Corps of Engineers, Mobile District). 2019. “Mobile Harbor, Mobile, Alabama integrated final general evaluation report with supplemental environmental impact statement, Mobile County, Alabama (GRR/SEIS).” GRR/SEIS. Mobile, AL: USACE. Accessed August 3, 2020. https://www.sam.usace.army.mil/Portals/46/docs/program_management/MHGRR/1-Mobile%20Harbor%20Main%20Report.pdf.
Johnston, M. M., S. C. Kim, and M. C. Allison. Forthcoming. Mobile Harbor, Alabama navigation improvement study: Ship simulation report. Technical Rep. Vicksburg, MS: U.S. Army Engineer Research and Development Center.
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© 2021 Published by American Society of Civil Engineers.
History
Received: Nov 16, 2020
Accepted: Apr 11, 2021
Published online: Jul 5, 2021
Published in print: Sep 1, 2021
Discussion open until: Dec 5, 2021
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