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. 




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



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How to use Culvert type 'u' properly

Andi Afif, modified 1 Year ago.

How to use Culvert type 'u' properly

Youngling Posts: 7 Join Date: 3/23/18 Recent Posts
Dear Delft user community,
I am trying to implement a Culvert in a simple Delft3d-Flow model and then will modify to represent a water system management as a pump in ocean dike. The dike is enclosed with thin walls and the intake and outlet of a pump are in the adjacent cells, one of the cells on outside the thin walls. Then, the pump will flow out one way through the thin walls as a response to differences in water levels so I was going to try and use type u culvert. I do not have much experience in compiling and manipulating Fortran codes, so I have a few questions about that and in the end, I will give the relevant files.

1.     In the manual (Section B.3.4.6) is mentioned that the key CulvertFile can optionally be used to point to an input file with parameter settings for the user routine CulvertFunction. Furthermore, in the manual, the example is culvert_params.txt. I was a bit unclear about this key (CulvertFile) and the contents of this file. Then, I found in the last section B.3.8 that mentioned the last routine would require an input file containing 1 1.0 5.0. Does anyone know about that?

2.     Later, I was trying to run the Delft-3d model use type-u Culvert like in the manual and use the original file of plugin_culvert.dll (/Delft3D 4.04.01/x64/dflow2d3d/bin). When I try to run the model use file.mdf, I encountered my problem run to error. Can someone enlighten me and brief me the solution on what might be a cause of this? I tried the same simulation with a ‘c’ and ‘d’ culvert and they run without errors. The tri-diag files is shown below. 
************************************************************************************** Deltares, FLOW2D3D Version, Jan 29 2019, 13:17:02***           built from :******           runid      : bismillah 3***           date,time  : 2019-09-20, 10:11:36************************************************************************************** MESSAGE Executable for 64-bits platform. *** MESSAGE Double precision computation using reals of kind    8 *** Start of User Defined Model description  - -  Nyobain sesuai Manual. Culvert -*** End   of User Defined Model description *** MESSAGE Upwind advection scheme only near momentum discharges *** MESSAGE Using UNESCO density formulation by default *** MESSAGE Momentum solver cyclic method is specified *** MESSAGE DRYFLP and DPSOPT both specified in MD-file. Using DPSOPT: MAX *** MESSAGE His, map, drogue, and fourier files written in single precision (except for time and horizontal coordinates).*** WARNING Latitude of your model is 0 degrees, model located at equator *************************************** *** Culvert data included      ****************************************** ERROR Can not open shared library .dll *** ERROR Flow exited abnormally

Thanks very much for your help.

Kind regards