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The HabitatRiver demonstration model provides a typical example of a large gravel bed river, with multiple vegetated islands, bars, and side channels. The upstream boundary of the model uses a stepped flow pattern fitting with the IFIM methodology, where flow is gradually increased from low to high flow conditions over a period of three hoursseven days. The downstream boundary condition utilizes a rating curve to define the relationship between the water level and flow in the channel. The model simulates the basic 3D hydrodynamics of the river system at various flow and stage combinations.
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