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Table 4

Advantages and disadvantages of AutoRoute and HEC-RAS 1D shallow-water equation modeling approach

ModelAdvantagesDisadvantages
AutoRoute Minimal data requirements Uses steady flow 
Computationally efficient Is one-dimensional 
Simple to set up and run for operational applications Does not simulate backwater 
HEC-RAS Can use steady or unsteady flow Requires cross-sections or 2D elevation grid 
Can be run in 1D or 2D Can be computationally expensive 
Uses physically based approach Complicated setup makes it difficult to use for operational applications 
ModelAdvantagesDisadvantages
AutoRoute Minimal data requirements Uses steady flow 
Computationally efficient Is one-dimensional 
Simple to set up and run for operational applications Does not simulate backwater 
HEC-RAS Can use steady or unsteady flow Requires cross-sections or 2D elevation grid 
Can be run in 1D or 2D Can be computationally expensive 
Uses physically based approach Complicated setup makes it difficult to use for operational applications 
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