river hydrodynamic

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az.paterlini@gmail.com
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river hydrodynamic

Postby az.paterlini@gmail.com » Thu Jun 24, 2010 15:47

Hello colleges,
I’m currently working in a problem of fluvial hydrodynamic modelling. Due to my lack of experience in that subject (I’m more used to marine environment) some doubts came out..
1) The first problem is related to the grid generation with Mohid GIS. I have a high resolution bathymetry, with only water points. When generating the digital terrain I extrapolated the bathymetric data intending to fill completely the river channel, but the I had problems defining the land points. I thought the land polygons would have this propose, but doesn’t seemed the work . Which approach should I take in that case? (I can send a image if necessary)
2) Do I need to close the downstream water boundary?
3)My other doubt is how should I initialize the river discharge. at the beginning of the boundary at the middle of the channel would be correct? Should I give the velocity field?

Well, a lot of questions I now, but if I someone can I answer any of these I’ll be truly glad.

Regards,
André

luis_at_mohid.com
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Postby luis_at_mohid.com » Tue Jun 29, 2010 12:47

Hi André,

1) Can you send me the image please. You need to define for sure the river margins.

2) No, you should open the downstream boundary

3) You can make a discharge over an area. This can be made using a polygon file generated in MOHID GIS. To do this use in the discharge file:

SPATIAL_EMISSION : Polygon
SPATIAL_FILE : ..\\..\\GeneralData\\BoundaryConditions\\Discharges\\DischargeArea.xy

Hope this helps,
Luis

az.paterlini@gmail.com
MOHID Beginner
Posts: 7
Joined: Thu Jan 01, 1970 00:00

Postby az.paterlini@gmail.com » Tue Jun 29, 2010 14:09

All right, no doubt it helped. and about the image, should I send it to your email? what would that be?

Thanks

André

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 16:09

Hi André,

yes, by mail please.

cheers,
Luis

az.paterlini@gmail.com
MOHID Beginner
Posts: 7
Joined: Thu Jan 01, 1970 00:00

Postby az.paterlini@gmail.com » Tue Jul 06, 2010 13:55

Hi Luis,

I've send it to you at: luis_at_mohid.com . Is that the correct address?

regards

André


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