Difference between revisions of "Fes2012"

Revision as of 15:51, 24 June 2014

Introduction

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FES2012 is the last version of the FES (Finite Element Solution) tide model developed in 2012. A new database was developed based on this model containing 32 tidal constituents distributed on 1/16° grids (amplitude and phase). More information can be found at: [1]. This database was rearranged in a HDF5 file ready to use in MOHID. Fes2012 tidal components can be used in MOHID by using a method described in the next sub sections.

Quick start

Get the input file with tidal components here: [2]. (Warning: the filesize is about 3GB and the download can take some time)

Mohid-tide Fes2012

Prepare the input file for tides:

• If you use MOHID GUI, you have to prepare a text file which content is described in the section below. The path of the file has to be defined in the interface as explained here: [3].
• If you use MOHID Studio, you have to prepare a file Tide_*.dat (where * is the simulation number), with the content of the sample input file described in the section below.
• Finally, in the Hydrodynamic input file, you should set TIDE : 1; You should do this either if you use MOHID Studio or MOHID GUI.

Input File

Here's what the input file should look like :

• Sample input:

TRIANGULATION             : 0
FILE_TIDAL_COMPONENTS     : ..\General data\Boundary Conditions\TidalComponents.hdf5

<beginHDFgauges>
EXTRAPOLATE               : 1
HARMONICS                 : 1
EXTRACT_HARMONICS         : 1
SPATIAL_INTERPOL          : 1
HARMONICS_FIELD_DIM       : M2/amplitude
NAME                      : water level
UNITS                     : m

LONGITUDE                 : -10.000 24.0000 12.0000
LATITUDE                  : 38.0000 4.00000 43.000
METRIC_X                  : -10.4036
METRIC_Y                  : 38.0788
REF_LEVEL                 : 2.08
TIME_REF                  : 0.000000

<<beginharmonics>>

2N2
J1
K1
K2
L2
M2
M3
M4
M6
M8
MF
MKS2
MM
MN4
MS4
N2
O1
P1
Q1
R2
S1
S2
S4
T2
<<endharmonics>>
<endHDFgauges>

the keyword FILE_TIDAL_COMPONENTS defines the HDF file that you downloaded at [4]

MOHID assumes that must generate levels from harmonic component in all points of the open boundary. However, the user can define in the input file the following keyword:

FILE_GAUGES_LOCATION  : TidalGaugeLocation.xyz

The file defined by the keyword FILE_GAUGES_LOCATION contains tidal gauge locations in a xyz file format. The steps to generate the tidal gauge location file are here: [5] (Step 1 only). If the tidal gauge location file is given, the water level is generated from the harmonic components at the points defined in the tidal gauge location file. Then levels at the point of open border are imposed by interpolation.

References

Aviso Website : [6]