Grain size classification

[Prasujya Gogoi]

Dear Prof Tom 

While loading the grain size and proportion data in CAESAR, I get this message Unhandled problem arises. I tried with the default grain size this problem never appears. Your advice will be highly appreciated. Is it because of less number of grain size classification ?? 

 

Regards 

Prasujya 

[Tom Coulthard]

Hi Prasujya – sorry for the late reply. What values are you putting in the boxes (maybe attach a screen shot?)

Tom

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[Prasujya Gogoi]

Dear Prof Tom

I have attached a snapshot of the list of grain size. I previously input the grain size in ascending order. That might cause a problem. Now it is running smoothly. 

I also have a question regarding fixing up the iteration time, maximum time step= 3600 (sec) and minimum time step= 1 (sec)as default. The default max iteration time is 100000. I presume that this need to be increased according to the needs (1year). have done some experiments as well in Caesar ,  I am going to do weekly simulation so I am trying to figure out what should be the probable iteration time, maximum and minimum time step for a weekly simulation in CAESAR. It is not clear in the WIKI of CAESAR. In short how a weekly simulation can be run instead of daily simulation as CAESAR save the output file per day basis.  Your help will be much appreciated.

Many Thanks

Prasujya 

[Tom Coulthard]

Hi – you need to have values in all of those boxes – even if they are zero’s.

Also , I notice you are running 1.6a there not the latest version?

 

Set the max iterations to a very high number – otherwise you risk the model stopping before the end of the elapsed time. You should (as per the wiki) not really have a minimum time step.. to run shorter simulations you just reduce the max duration of the run….

[Prasujya Gogoi]

Dear Prof Tom

I find CAESAR Lisflood 1.9b more user-friendly and most of the things are clear, especially we don't have to set max iteration which limits the risk of the model stops in between. I have filled all the blanks with zero in the sediment grain size tab. The only problem is to speed up the simulations. while running simulations I have switched off drop box, skype etc and it helps in speed up the simulations. 

Many Thanks 

Prasujya