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Evaluating Impacts of Water Levels on Commercial Navigation using the GL-SAND Model

Jonathan Brown;Paul Yu
The Great Lakes Systems Analysis of Navigation Depths model was used in the evaluation of the impacts of changing water levels on the commercial navigation interest. The model calculates transportation costs associated with variable harbor channel depths by incorporating representative shipping patterns (historical shipment list), and other vessel and system characteristics. Decreases in available vertical water column (depths) at ports and docks lead to light loading and the need to make more round trips to carry a given annual cargo tonnage, resulting in higher costs. A user was included in the documentation of this model. A representation of this model was incorporated into the IUGLS Shared Vision Model and approved by the Commercial Navigation technical working group for evaluating Lake Superior regulation plans.
GL-SAND Model Documentation
Viewable Data:
Project Depth Data by Dock
Great Lakes System Analysis of Navigation Depths (GL-SAND)
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Supporting Content (Show)
Main Topics
Lake Superior Regulation
Questions We Asked
Can a regulation plan be designed to perform better than Plan 1977A?
What are the main benefits of the new regulation plan?
View all 3 questions we asked
Does the plan benefit commercial navigation?
Key Findings
Plan 2012 will be more robust and provide important benefits compared to Plan 77A
Plan 2012 provides overall economic improvements
Approve Lake Superior Plan 2012
Commercial Navigation Evaluation