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

map-file time inconsistency

Jacob Morgan, modified 4 Years ago.

map-file time inconsistency

Youngling Posts: 5 Join Date: 7/31/15 Recent Posts
I am having an interesting issue restarting from map-files that I am not sure if others have experienced (or if they have I have not found any threads about it).

I have a series of morphodynamic simulations that I need to restart from previous map-files. In the original simulations the reference time started on the hour and map-files were specified to be updated every ten minutes (my timestep, 0.0005 min, should allow this). When I look at the map-files though the times associated with them are not exactly at ten minute intervals. They are off by very small fractions of a second. Because of this, I am unable to restart from them. When I put in the time on the ten minute interval that they should be I get an error saying that restart time is not found on the map-file. When I do put in the exact time associated with the map-file I get an error saying that the restart time is not a multiple of the time step.

1. What could be the cause of this? Does it have something to do with the simulation time (100 hrs) being too long for a single reference date?

2. Is there a way to proceed from this point and use the map-files I already have? For example, is there a way to change the timestamp associated with the outputs in a map-file to be either on the ten minute interval or at least a multiple of my timestep?

I would appreciate any help!

William Smith, modified 11 Months ago.

RE: map-file time inconsistency

Youngling Posts: 1 Join Date: 3/26/20 Recent Posts
ya sir i read your whole qstn i need some time to explain it because im stuck right now in other thingsĀ PrepaidGiftBalance