FMA Challenge 3: Difference between revisions
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The 1D river channel model was linked to the 2D model using HX cells along the top of either natural or build levees on either side of the channel. These locations defined the location of spill into the floodplain and are the key control on how much flow can interact between the floodplain and river conveyance area.▼
All outflow from the model was assumed to be only via the main channel (ie. there was no water level boundary applied to the 2D overbank domain).▼
==Computational Domain Assembly and Execution==
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==Boundary Conditions==
The 1d/2d linking was along the top of the levee. The elevations along these levees were extracted from the 10ft DEM, these and other significant features were included in the TUFLOW model as 3D GIS breakline layers, ensuring the hydraulic control is represented in the grid regardless of cell size.
▲The 1D river channel model was linked to the 2D model using HX cells along the top of either natural or build levees on either side of the channel. These locations defined the location of spill into the floodplain and are the key control on how much flow can interact between the floodplain and river conveyance area.
▲All outflow from the model was assumed to be only via the main channel (ie. there was no water level boundary applied to the 2D overbank domain).
The flood extent from the 100ft 2D grid model is shown below.
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