Due to SPAM attacks, new members must be approved before posting.  Please email when registering and your account will be approved.

Main Menu

Time zero crash

Started by pperrin, March 10, 2016, 06:42:25 AM

Previous topic - Next topic


Hi All,

I have been experimenting with SLAMM (v6.2 beta) to investigate its potential application to saltmarshes in Ireland. I have been implementing some of the changes proposed for the UK by Aikaterini Pylarinou. I still have quite a bit to do on the modifications, but right now I am having problems with the original interface. Three things:

i) When I run a simulation with "Run Model for NWI Photo Data (TO)" unchecked, the program crashes back to the main menu immediately after outputting the initial conditions.  Any suggestions?
ii) With this said, is there anything to be gained by not running the time zero step?
iii) If the time zero step is run, does it form the basis for subsequent steps or do subsequent steps build on the initial conditions? I have been assuming the former.

Many thanks


Jonathan S. Clough

1. This is a known bug.  Actually, rather than fixing it in the current version we've removed that check box given that Time-Zero runs are an important step that should not be jumped over in model setup or application.

2. It will save a bit of computational time, but that doesn't seem a good excuse to skip a step that can be used either to a.) test the model setup with regards to tide ranges, wetland maps, and wetland elevation maps, or b.) adjust the model so that all predictions after time zero are a function of SLR, not a function of data error at setup.

3. The time-zero step forms the bases for subsequent steps.  Because there is no SLR at time-zero, any changes here are due to horizontal or vertical data error, or some fringe of wetlands extending outside of their expected range.  Therefore if the model is to determine the effects from SLR, model results should be run from time zero and results should be interpreted from time-zero forward rather than from initial condition forward.

Hope this is useful -- J