intro story Coast / Estuary

Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 
 

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Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 

 

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Depth averaged velocities off by a factor of 10.

AD
A D, modified 2 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.