Modelling Rivers

River

Rivers are natural water courses. They have vital contributions to the social and economical welfare of societies living along their course. They provide continuous, usually dependable, flow and supply of water. Accordingly, centralised civilisation began emerging independently along number of river valleys; e.g. the Nile, Tigris and Euphrates, the Indus and the Yellow Rivers. Since then, mankind has been in continuous struggle to understand and live in harmony with this gift/force of nature. Modelling rivers is the modern way to understand their behaviour and is an essential tool to tackle several river problems.

Delft3D is the state-of-the-art modelling framework for hydrodynamics, water quality, ecology, waves and morphology.
 
Here, in this space, we share knowledge & experiences, and discuss issues related to modelling of rivers.
 
 

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D-Flow Flexible Mesh
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Cohesive sediments & muddy systems


 

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Depth averaged velocities off by a factor of 10.

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A D, modified 3 Years ago.

Depth averaged velocities off by a factor of 10.

Youngling Posts: 15 Join Date: 9/25/17 Recent Posts
Hello, this post is an update to one of my previous posts. (https://oss.deltares.nl/web/delft3d/coast-/-estuary/-/message_boards/view_message/1379949).

I have played around with some parameters to get a decent model. Everything looks fine except that my depth averaged velocities are exactly off by a factor of 10. I'm getting highs of about 0.1 m/s when I should be getting 1 m/s. I have checked the units of all my parameters and they are all in meters. My results for water level accurately describe the local tidal conditions (+/- 1 m). But my depth averaged velocities are wrong.

Any input on what could be wrong greatly appreciated.

Thank you.