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RE: Global X from NetCDF and x.grd for 1D runs not the same

Russell Nasrallah, modified 1 Month ago.

Global X from NetCDF and x.grd for 1D runs not the same

Capillary Posts: 10 Join Date: 5/8/18 Recent Posts

Hello all, 
I am trying to plot some post-storm profiles in comparison to some post-storm lidar data I have. I tried to base them all on my x.grd file for sample spacing, but when I go to plot outputs of the model (based on global x from netCDF) and compare them to my actual post-storm profiles (based on the x.grd file), I noticed that the spacing between the two is different for some reason. 
I've attached an example of what I mean below. Does anyone know why xbeach (version 5527) might be modifying my x.grd file and creating a new spacing? 

The 'example profiles' text file below shows the x-distances and bed levels for one such 1d transect.  

Russell Nasrallah, modified 1 Month ago.

RE: Global X from NetCDF and x.grd for 1D runs not the same

Capillary Posts: 10 Join Date: 5/8/18 Recent Posts

I did some additional testing with the Groundhogs Day version and realized that perhaps this is happening due to the rotation of my domain. Previously I had been running in thetanaut = 1, but given that my domain is on th East Coast of the United States, I was having some trouble with the offshore boundary being on the right, not the left. I changed to Cartesian coordinates and incorporated an alfa=190 (since my shoreline is slightly nnw/sse orientation) and since then my global x has been modified, it is both shorter, and negative. Am I missing some other step I need to incorporate in order to have my domain keep its dimensions? It seems to have been foreshortened by the inclusion of the 190 degree alfa. I will be testing an alfa of 180 to determine if the global x then remains the same. 

Russell Nasrallah, modified 1 Month ago.

RE: Global X from NetCDF and x.grd for 1D runs not the same

Capillary Posts: 10 Join Date: 5/8/18 Recent Posts

Still trying to determine the source of the issue, and it seems like my global x is my x.grd after being multiplied by cos(alfa). Any idea why this is happening? It seems like it is shrinking my domain. (see my study area with transects attached)
 

Russell Nasrallah, modified 1 Month ago.

RE: Global X from NetCDF and x.grd for 1D runs not the same

Capillary Posts: 10 Join Date: 5/8/18 Recent Posts

All has been solved, 
After talking with some peers, I determined that since I rotated my domain by alfa, the global x and global y contained the rescaling effects and their resultant was the same distance as my x.grd file, therefore I am just using the same spacing for all points.