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What is Modeling Ineffective Flow Areas in HEC-RAS about?

Ineffective flow areas are portions of floodplains where flow velocity is near zero and flow is not actively conveyed, such as areas around bridge abutments. These areas are given a slope and triggered water elevation to restrict conveyance calculations until flow becomes effective. Modeling ineffective areas properly represents flow conveyance and requires modifying channel sections upstream and downstream of structures generating ineffective areas.

Author

Md Mamunur Rashid

Language

EN