FMA Challenge 1 (1D-2D linked): Difference between revisions
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==Cross Section Spacing, Grid Size and Mesh Element Size==
1D sections were used for the in-bank topography. The overbank (2D) areas were modelled using 10ft (~3m) and 15ft (~4.5m) resolutions. The 2D grid dimension (rotated) was 17,500ft by 8,000ft. A total of 87 cross-sections were used for the 1D in-bank domain.
Structures were modelled as a combination of bridges and culverts. For bridges, height varying energy loss tables were used based on the Hydraulics of Bridge Waterways (Bradley, 1978). For culverts, TUFLOW simulates all possible inlet and outlet controlled flow regimes with automatic switching between regimes. The calculations of culvert flow and losses are carried out using techniques from “Hydraulic Charts for the Selection of Highway Culverts” and “Capacity Charts for the Hydraulic Design of Highway Culverts”, together with additional information provided in the literature such as Henderson 1966.
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