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

Transport Files Error in FLOW module

Jake Briggs, modified 5 Years ago.

Transport Files Error in FLOW module

Youngling Posts: 1 Join Date: 9/6/15 Recent Posts
Dear All,

I seem to be having great difficulty when running the FLOW module, the following error from the tdatmain report gives the following;

MESSAGE Local time zone is UTC + 10.0 hours
*** MESSAGE Using UNESCO density formulation by default
*** MESSAGE Evaporation not taken into account in continuity equation
*** MESSAGE Number of pivot points to convert wind speed to wind drag coef.: 3
*** MESSAGE Momentum solver cyclic method is specified
*** MESSAGE DRYFLP and DPSOPT both specified in MD-file. Using DPSOPT: DP
*** MESSAGE Transport solver cyclic-method method is specified
*** MESSAGE Reading BC-hydrodynamic file bctFeb9.bct
*** MESSAGE Reading BC-transport file bccFeb9.bcc
*** ERROR Consecutive times in bccFeb9.bcc must increase

I don't understand what this error is actually referring to. I know the file in question is bout the transport conditions file when defining the boundaries within the module.

I have two defined boundaries - one for river discharge using a 'Total Discharge' boundary type with time series discharge data, and my other represents an ocean boundary which is a 'Water Level' boundary type. For both boundaries I have salinity, temperature and sediment information.

Any help would be greatly appreciated.

Jake Briggs
Qinghua Ye, modified 5 Years ago.

RE: Transport Files Error in FLOW module

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
HI Jake,

It is because the time length in the transport boundary is shorter than your simulation time. You must increase the time/values in the bcc file.


Vasudevan shankar, modified 3 Years ago.

RE: Transport Files Error in FLOW module

Youngling Posts: 4 Join Date: 12/31/14 Recent Posts
yeah Dr. Qinghua ye point is right
I am also facing this same issue, but i checked once in my time series .bct or .bcc file each time value. i had found two values repeated at same values one by one. so, you would check your time series values