low velocities inside modeled domain

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gustavoho30@gmail.com
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Posts: 3
Joined: Thu Jan 01, 1970 00:00

low velocities inside modeled domain

Postby gustavoho30@gmail.com » Thu May 06, 2010 23:58

Dear list users,

I`m new to MOHID and I've been trying to simulate a simple tidal wave propagation through a stretch of the coast in 2D mode.
My model domain is about 35x65km and goes from the coast to about 500 meters depth and I`m specifying tidal constituents at the open boudaries (nourth,south,east).

I was able to run the model, the elevations look ok ,but the velocities are extremly low inside the domain (a maximum of 0.1).

Here is my Hidrodynamic file:
ADV_METHOD_H : 4
ADV_METHOD_V : 4
TVD_LIMIT_H : 4
TVD_LIMIT_V : 4

BAROCLINIC : 0

CORIOLIS : 1

TIDE : 1

OUTPUT_TIME : 0. 3600.

RESIDUAL : 1
ENERGY : 1

TIME_SERIE : 1
TIME_SERIE_LOCATION : C:\\mohidfiles\\TimeSerieLocation-geo.dat

I`m using rugosity and viscosity coefficients =0.025 and
VISCOSITY_V : 0.0010
VISCOSITY_H : 20

I have tried several different configurations: linear, curvilinear, rotated grids, from 100 to 500 grid cell size but got same results.

I wonder if something is wrong with my tidal gauges:
<begin_xyz>
-39.89418 -19.72372 0
-39.79161 -19.73497 0
-39.70589 -19.72653 0
-39.6265 -19.73497 0
-39.57522 -19.73145 0
-39.58365 -19.78695 0
-39.57522 -19.84457 0
-39.58646 -19.91693 0
-39.57452 -19.99 0
-39.60262 -20.03567 0
-39.6799 -20.02653 0
-39.71995 -20.03496 0
-39.78599 -20.02162 0
-39.85484 -20.03356 0
-39.92018 -20.02513 0
-40.01995 -20.03778 0
<end_xyz>

After running mohid-tide everything looks ok, except for a few of these stations that I delete. I`ve tried fewe stations but didnt help either.

Any help would be greatly appreciated.
Cheers,
Gustavo Oliveira

luis_at_mohid.com
MOHID Developer
Posts: 553
Joined: Thu Jan 01, 1970 00:00
Location: Instituto Superior Técnico - Technical University of Lisbon
Contact:

Postby luis_at_mohid.com » Tue Jun 08, 2010 09:49

Hi Gustavo,

Can you post the tidal gauge file with the harmonics please?

Cheers,
Luis

gustavoho30@gmail.com
MOHID Beginner
Posts: 3
Joined: Thu Jan 01, 1970 00:00

Postby gustavoho30@gmail.com » Thu Jun 24, 2010 13:41

Thanks for the reply.
The tidal constituent file is reproduced below.
Note that I eliminated the first five or so stations because they had spurious data.

<begingauge>
NAME : nth test
LONGITUDE : -39.0000 35.0000 1.00000
LATITUDE : -19.0000 47.0000 13.0000
METRIC_X : -39.5836
METRIC_Y : -19.7870
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.466671 173.364
S2 : 0.203472 -172.853
K1 : 0.0522832 -147.841
K2 : 0.0589992 -179.239
N2 : 0.0746649 176.836
2N2 : 0.0113774 -179.530
O1 : 0.0870129 140.452
Q1 : 0.0175500 -147.742
P1 : 0.0224716 107.635
M4 : 0.000000 0.000000
Mf : 0.0102495 -9.98223
Mm : 0.00522152 -7.96358
Mtm : 0.00251279 -16.8241
MSqm : 0.000346886 -14.3435
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 34.0000 30.0000
LATITUDE : -19.0000 50.0000 40.0000
METRIC_X : -39.5752
METRIC_Y : -19.8446
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.463341 173.492
S2 : 0.201766 -172.721
K1 : 0.0523573 -147.836
K2 : 0.0584958 -179.092
N2 : 0.0741431 177.082
2N2 : 0.0113142 -179.289
O1 : 0.0869137 140.469
Q1 : 0.0175786 -147.745
P1 : 0.0224424 107.655
M4 : 0.000000 0.000000
Mf : 0.0102070 -10.1216
Mm : 0.00519780 -7.94450
Mtm : 0.00246889 -16.4530
MSqm : 0.000341074 -13.9129
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 35.0000 11.0000
LATITUDE : -19.0000 55.0000 0.000000
METRIC_X : -39.5865
METRIC_Y : -19.9169
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.460188 173.560
S2 : 0.200272 -172.658
K1 : 0.0524407 -147.858
K2 : 0.0580721 -179.040
N2 : 0.0736198 177.291
2N2 : 0.0112574 -179.064
O1 : 0.0868360 140.468
Q1 : 0.0176228 -147.768
P1 : 0.0224089 107.658
M4 : 0.000000 0.000000
Mf : 0.0101511 -10.1759
Mm : 0.00515436 -7.87725
Mtm : 0.00242676 -15.9560
MSqm : 0.000335437 -13.3788
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 34.0000 28.0000
LATITUDE : -19.0000 59.0000 23.0000
METRIC_X : -39.5745
METRIC_Y : -19.9900
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.457470 173.620
S2 : 0.199017 -172.595
K1 : 0.0525265 -147.895
K2 : 0.0577332 -179.011
N2 : 0.0731795 177.469
2N2 : 0.0112093 -178.879
O1 : 0.0867949 140.488
Q1 : 0.0176834 -147.827
P1 : 0.0223718 107.680
M4 : 0.000000 0.000000
Mf : 0.0100843 -10.2124
Mm : 0.00508152 -7.63996
Mtm : 0.00238854 -15.3746
MSqm : 0.000330317 -12.7660
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 36.0000 9.00000
LATITUDE : -20.0000 2.00000 8.00000
METRIC_X : -39.6026
METRIC_Y : -20.0357
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.456219 173.600
S2 : 0.198542 -172.632
K1 : 0.0525734 -147.943
K2 : 0.0575998 -179.049
N2 : 0.0729564 177.528
2N2 : 0.0111881 -178.791
O1 : 0.0867866 140.454
Q1 : 0.0177048 -147.881
P1 : 0.0223575 107.625
M4 : 0.000000 0.000000
Mf : 0.0100572 -10.2612
Mm : 0.00506717 -7.64532
Mtm : 0.00237971 -15.3995
MSqm : 0.000329019 -12.7819
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 40.0000 47.0000
LATITUDE : -20.0000 1.00000 35.0000
METRIC_X : -39.6799
METRIC_Y : -20.0265
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.456835 173.504
S2 : 0.198961 -172.754
K1 : 0.0525600 -147.941
K2 : 0.0577402 -179.161
N2 : 0.0730172 177.446
2N2 : 0.0112024 -178.829
O1 : 0.0867990 140.400
Q1 : 0.0176739 -147.961
P1 : 0.0223764 107.542
M4 : 0.000000 0.000000
Mf : 0.0100699 -10.3230
Mm : 0.00509968 -7.68003
Mtm : 0.00244508 -15.1626
MSqm : 0.000337731 -12.6386
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 43.0000 11.0000
LATITUDE : -20.0000 2.00000 5.00000
METRIC_X : -39.7199
METRIC_Y : -20.0350
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.456840 173.455
S2 : 0.199053 -172.817
K1 : 0.0525838 -147.947
K2 : 0.0577835 -179.211
N2 : 0.0730016 177.426
2N2 : 0.0112048 -178.821
O1 : 0.0867965 140.371
Q1 : 0.0176612 -148.046
P1 : 0.0223788 107.476
M4 : 0.000000 0.000000
Mf : 0.0100619 -10.4015
Mm : 0.00511789 -7.59321
Mtm : 0.00248267 -15.1129
MSqm : 0.000342683 -12.6354
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 47.0000 9.00000
LATITUDE : -20.0000 1.00000 17.0000
METRIC_X : -39.7860
METRIC_Y : -20.0216
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.458191 173.373
S2 : 0.199805 -172.920
K1 : 0.0525699 -147.933
K2 : 0.0580102 -179.304
N2 : 0.0731895 177.343
2N2 : 0.0112349 -178.869
O1 : 0.0868111 140.329
Q1 : 0.0176348 -148.051
P1 : 0.0223687 107.401
M4 : 0.000000 0.000000
Mf : 0.0100663 -10.4750
Mm : 0.00520310 -8.11807
Mtm : 0.00256831 -16.3367
MSqm : 0.000353792 -13.9335
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 51.0000 17.0000
LATITUDE : -20.0000 2.00000 0.000000
METRIC_X : -39.8548
METRIC_Y : -20.0336
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.459030 173.304
S2 : 0.200353 -173.015
K1 : 0.0525816 -147.930
K2 : 0.0581657 -179.389
N2 : 0.0732690 177.302
2N2 : 0.0112529 -178.864
O1 : 0.0868285 140.285
Q1 : 0.0176394 -148.001
P1 : 0.0223256 107.280
M4 : 0.000000 0.000000
Mf : 0.0100431 -10.4905
Mm : 0.00528541 -9.10571
Mtm : 0.00262421 -18.3750
MSqm : 0.000360749 -15.9931
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -39.0000 55.0000 12.0000
LATITUDE : -20.0000 1.00000 30.0000
METRIC_X : -39.9202
METRIC_Y : -20.0251
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.460927 173.243
S2 : 0.201394 -173.092
K1 : 0.0525820 -147.903
K2 : 0.0584798 -179.457
N2 : 0.0735546 177.237
2N2 : 0.0112685 -178.888
O1 : 0.0868404 140.256
Q1 : 0.0176458 -147.953
P1 : 0.0223249 107.246
M4 : 0.000000 0.000000
Mf : 0.00999256 -10.2731
Mm : 0.00526257 -10.3437
Mtm : 0.00268190 -21.5705
MSqm : 0.000367496 -19.2113
<endgauge>


<begingauge>
NAME : nth test
LONGITUDE : -40.0000 1.00000 11.0000
LATITUDE : -20.0000 2.00000 16.0000
METRIC_X : -40.0200
METRIC_Y : -20.0378
REF_LEVEL : 0.000000
TIME_REF : 0.000000
M2 : 0.462924 173.163
S2 : 0.202602 -173.196
K1 : 0.0526387 -147.886
K2 : 0.0588515 -179.567
N2 : 0.0738543 177.179
2N2 : 0.0112668 -178.876
O1 : 0.0868539 140.218
Q1 : 0.0176814 -147.907
P1 : 0.0223476 107.230
M4 : 0.000000 0.000000
Mf : 0.00991181 -9.72310
Mm : 0.00515712 -11.7702
Mtm : 0.00271894 -25.9592
MSqm : 0.000370992 -23.6003
<endgauge>

luis_at_mohid.com
MOHID Developer
Posts: 553
Joined: Thu Jan 01, 1970 00:00
Location: Instituto Superior Técnico - Technical University of Lisbon
Contact:

Postby luis_at_mohid.com » Tue Jun 29, 2010 12:44

Hi again,

Can you send the file to me? It was not completely posted.

Cheers,
Luis

gustavoho30@gmail.com
MOHID Beginner
Posts: 3
Joined: Thu Jan 01, 1970 00:00

tide file

Postby gustavoho30@gmail.com » Thu Jul 01, 2010 03:01

Hello Luis,
I have sent the file to your e-mail.
Thanks for the help.
Cheers,
Gustavo


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