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RE: Berm is not created! Always erode.

TG
Thamali Gunaratna, modified 3 Years ago.

Berm is not created! Always erode.

Capillary Posts: 17 Join Date: 1/2/16 Recent Posts
Dear All,

I am struggling with my xbeach calibration to output a berm formation for a sedimentary wave condition. (experiment conducted in a lab)
I still cannot create the berm in xbeach. I have given the parameters I input here. Can someone tell me what is the mistake?
I calibrated for wetslp, dryslp, hswitch, facua, C, wci, morfac, lws and many more. Still the profile seems to be eroding.

Thank you!

-----Physical processes-----
flow=1
q3d = 1
nonh=0

------Calibration Parameters------
dryslp = 0.2
wetslp = 0.1

-----Specifying grid and depth-----
nx=48
ny=5
depfile=bed.dep
dx=0.1
dy=0.1
posdwn=-1
thetamin=-90
thetamax=90
dtheta=10

-----Time management-----
tstart=0
tint = 1
tstop= 1200

-----User input-----
instat = stat
Hrms = 0.018
Tm01 = 8
dir0 = 270.

-----Flow boundary condition-----
front=1
back=2

-----Multiple sediment fraction and hard layer-----
D50=0.00002

-----Morhplological updating and avalanching-----

morstart=0
morstop = 1200

------Tides------------------------------
zs0 = 0
tideloc=0


:::::emoticonutput Details::::::::::::::

nglobalvar = 1
zb

outputformat = netcdf
tunits = s
CS
Constantin Schweiger, modified 3 Years ago.

RE: Berm is not created! Always erode.

Wind Posts: 26 Join Date: 1/20/17 Recent Posts
Hello Thamali,

I had (maybe) some similar problems concering the erosion of my entire model. I handeld the direcrtional grid for short waves wrong. i defined to have a nautical convention but used wrong values for thenamin and thetamax. I troubleshooted it by setting thetanaut = 1 angle w.r.t to N -> W is 270) and themin = 225 and thetamax = 315 as my offshore boundary is perpendicular to the x axis.

http://oss.deltares.nl/web/xbeach/forum/-/message_boards/view_message/1181175

Maybe it'll help!

Best regards,

Constantin
WR
William Riley, modified 1 Month ago.

RE: Berm is not created! Always erode.

Capillary Posts: 7 Join Date: 2/5/20 Recent Posts
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RE: Berm is not created! Always erode.

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RE: Berm is not created! Always erode.

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RE: Berm is not created! Always erode.

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RE: Berm is not created! Always erode.

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RE: Berm is not created! Always erode.

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