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

 

 

Message Boards

Spatially varying sediment diameter

Eduardo G-Gorbeña, modified 2 Years ago.

Spatially varying sediment diameter

Youngling Posts: 6 Join Date: 8/8/14 Recent Posts
Hi all,

I am trying to use a *.d50 file for the SedDia as part of the .sed file as follows:

[SedimentFileInformation]
FileCreatedBy = Delft3D FLOW-GUI, Version: 3.56.29165
FileCreationDate = Thu Mar 30 2017, 08:51:24
FileVersion = 02.00
[SedimentOverall]
Cref = 1.6000000e+003 [kg/m3] CSoil Reference density for hindered settling calculations
IopSus = 0 If Iopsus = 1: susp. sediment size depends on local flow and wave conditions
[Sediment]
Name = #Sediment1# Name of sediment fraction
SedTyp = sand Must be "sand", "mud" or "bedload"
RhoSol = 2.6500000e+003 [kg/m3] Specific density
SedDia = #SedNorth.d50# [m] Median sediment diameter (D50)
CDryB = 1.6000000e+003 [kg/m3] Dry bed density
IniSedThick = 5.0000000e+000 [m] Initial sediment layer thickness at bed (uniform value or filename)
FacDSS = 1.0000000e+000 [-] FacDss * SedDia = Initial suspended sediment diameter. Range [0.6 - 1.0]

but I always I try to import the .sed file (in Physical parameters > Sediments), I get the following error in the Flow GUI:

Fatal errors encountered while reading file
...
Import will be aborted!

Error reading file at sediment sediment Sediment1, key SedDia
+++++++
Import rejected!
+++++++

Could anyone please help me to identify what it is wrong?

Thank you in advance.

Regards,

Eduardo
Qinghua Ye, modified 2 Years ago.

RE: Spatially varying sediment diameter (Answer)

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Eduardo,

The GUI will complain, but the computation kernel will not complain. So you still can carry on a computation by changing the settings in the sed file.

Greetings,

Qinghua