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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Critical bed shear stress for erosion - MAP x Constant Value

LP
Lucas Pion, modified 2 Years ago.

Critical bed shear stress for erosion - MAP x Constant Value

Youngling Posts: 9 Join Date: 5/7/13 Recent Posts
Hello everyone,

I'm finding some problems in establishing critical bed shear for erosion.
After some unsatisfying results, I ran the following simulations:

1.) Simulation with constant critical bed shear stress for erosion 0.25 N/m²
2.) Simulation with constant critical bed shear stress for erosion 0.25 N/m², but inputed as a map with constant value.

The problem is that these simulations had different results. How is that possible?
I have already checked all other input files and values and they are all the same.

Thank you very much!
Lucas