About the morphological changes in sea floor

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liangliang
Posts: 61
Joined: Mon Jul 20, 2009 2:41 pm
Location: Port And Costal Engineering Laboratory

About the morphological changes in sea floor

#1 Post by liangliang » Sun Dec 20, 2009 3:52 am

Everyone:
hello!
I have a question about the morphological changes in sea floor when i simulate an estuary's evolvement .In the output files,which variable reflects the change of bed?
Thanks!

nganju
Posts: 82
Joined: Mon Aug 16, 2004 8:47 pm
Location: U.S. Geological Survey, Woods Hole
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Re: About the morphological changes in sea floor

#2 Post by nganju » Mon Dec 21, 2009 1:59 am

The variable "bath" tracks changes in depth, assuming you are using the "SED_MORPH" option to actively update the bathymetry. If you are not using SED_MORPH, but just want to track erosion and deposition, the variable "bed_thickness" tracks the net erosion or deposition.

liangliang
Posts: 61
Joined: Mon Jul 20, 2009 2:41 pm
Location: Port And Costal Engineering Laboratory

Re: About the morphological changes in sea floor

#3 Post by liangliang » Tue Dec 22, 2009 7:33 am

nganju :
THanks for your reply !
If the option SED_MORPH is actived,is there some new variables in the output files.For example,which variable can express the bed level change,the'change'?

nganju
Posts: 82
Joined: Mon Aug 16, 2004 8:47 pm
Location: U.S. Geological Survey, Woods Hole
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Re: About the morphological changes in sea floor

#4 Post by nganju » Tue Dec 22, 2009 2:08 pm

if SED_MORPH is turned on, the new variable that is reported in the history files is "bath", which is the new updated water depth. The change in depth is the difference in "bath" from each successive time step. The change in bed thickness is the difference in "bed_thickness". Bed thickness is reported when "SEDIMENT" is used. Change in bed level can be computed from either of these variables.

zhuwenwu
Posts: 1
Joined: Sun Oct 28, 2012 6:56 pm
Location: SKLEC East China Normal University

Re: About the morphological changes in sea floor

#5 Post by zhuwenwu » Wed Oct 07, 2015 2:02 am

nganju wrote:The variable "bath" tracks changes in depth, assuming you are using the "SED_MORPH" option to actively update the bathymetry. If you are not using SED_MORPH, but just want to track erosion and deposition, the variable "bed_thickness" tracks the net erosion or deposition.
Are you sure? it seems that the bed layers are modified at each time step to account for erosion and deposition. If I want to compute the volume of erosion and deposition, how to do?

Thanks.

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