Re: Error in gauge recordings

[Teja sri]

i am running an tsunami example, have taken Chile 2010 example for reference.I have ran tsunami example with few gauge points, i got the gauge readings wrongly i guess, i did not get any wave height or wave form at some gauge points. i have attached that sample reading below.

Please help with this, how to get the wave form? whether attached figure is correct or wrong? if it is wrong how to get correct readings at that  particular gauge station?

Thanks in advance

[Kyle Mandli]

That looks like the gauge is not in the water at a particular resolution.  When a gauge is located on land it takes on the value of the topography height.  Here you can see the gauge is jumping between a little above 10 meters and sea-level.  What you will have to do is look at where the gauge is and use the regions to get the refinement to be located where the gauge is.

Kyle

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[Teja sri]

Thank you for the response sir, 

the gauge, i have mentioned is not on land, but it is maybe 3 kms away from the land. will i be a problem?

rundata.gaugedata.gauges.append([10004, 93.862, 6.816, 0., 1.e10])  : this is gauge location

rundata.regiondata.regions.append([3, 3, 0., 10000., 90,95,4,9])   : this region i have given for refinement

Is it sufficient?

and how to get the inundation sir?

please help for queries mentioned above, it will be helpful for me.

Thank you in advance

[Kyle Mandli]

At the resolution given the gauge may or may not be in the water.  A gauge that is 3 km from the coast should be plenty far away for the gauge to remain in the water physically but you will still need to figure out what resolution is necessary to ensure that this happens computationally.  Unfortunately this depends on the specific case so you will have to experiment with the resolution around the gauge.  Your region definition should work for this.

Inundation can be measured in many different ways depending on what you would like.  A gauge can do this as both the sea-surface and depth is recorded.  You can also have GeoClaw record a particular region by using fixed grids (http://www.clawpack.org/fgout.html) and/or monitoring various quantities on these grids (http://www.clawpack.org/fgmax.html) such as the maximum depth.

Kyle

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