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

RE: reading water level from NEFIS file using vs_ matlab functions

Kevin Hanegan, modified 5 Years ago.

reading water level from NEFIS file using vs_ matlab functions

Youngling Posts: 6 Join Date: 7/2/11 Recent Posts
Hi,
First, it looked like the OET forum was not active, so I thought this would be the best place to post. If anyone knows a better place to discuss Open Earth Tools issues, please advise.

I found an issue with the OpenEarthTools\matlab\applications\delft3d_matlab\vs_let.m function when reading water level. According to the self-describing fields in the NEFIS file (found using vs_disp), the S1 variable is water level:


Groupname:map-series Dimensionsemoticon4177)
No attributes
S1 REAL * 4 [ M ] ( 12 5002 )
Water-level in zeta point


so the water level is read using:

vs_let(TRIM,'map-series','S1')

However, this actually returns the water level and bed level in dry cells (equivalent to the water level( when dry: bed level) variable in QUICKPLOT. In QUICKPLOT, water level is a distinct output variable where NaN's are returned for water level in dry points. There is of course a workaround using the logical arrays of active/non-active points also contained in the NEFIS file, but does anyone know of an alternative syntax or variable name that would give me just water level and not also include bed level in dry points?

Thanks,
Kevin
DI
DERYA ITIR DILMEN, modified 10 Months ago.

RE: reading water level from NEFIS file using vs_ matlab functions

Youngling Posts: 3 Join Date: 6/11/18 Recent Posts

You can also use quickplot Matlab functions inside the Delft3D-Matlab tools:

trimfile=qpfopen('C:/......./trim.dat');

read_wl= qpread(trimfile, 'water level', 'data');

water_level=read_wl.Val;