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



Message Boards

CONSBL: grazing fluxes are recorded all NaN

João Lencart e Silva, modified 7 Years ago.

CONSBL: grazing fluxes are recorded all NaN

Padawan Posts: 71 Join Date: 3/30/11 Recent Posts
Hi all,

Still trying to make some sense of CONSBL...
I now have a calculated zoo concentration that makes some impact in my model. I still have to calibrate input concentrations and grazing rates. For that I need to see what are the grazing fluxes.
I've tried to look into dGrzAlgX, dGrzDetX and I even added dGrzGreen to my inp file (which is listed but not available in the GUIs).
All of that comes out with NaN in both my his and map files. This is strange since my Greens and DetX are all impacted by adding the zoo...

How can I access the calculated fluxes?

I'm running with ZfrDetBot = 0 and ZUnitSW = 0.


Thanks in advance,

Jan van Beek, modified 7 Years ago.

RE: CONSBL: grazing fluxes are recorded all NaN (Answer)

Hi João,

The fluxes (dGrxAlgx, etc) are not available in the normal output but they are availeble in the balance output. Too see individual fluxes you need to set the option BALANCES-SOBEK-STYLE
together with BAL_NOLUMPPROCESSES, see the documentation for more on the balance output options.

All of the fluxes will be integrated for the monitoring points and areas. A timesries with the monitoring timestep will be written to the *-bal.his file. An integrated mass balance over the complete monitoring interval will be written to the *-bal.prn file.