Coastline behaviour: Standstill vs Beaching

[ytmben]

Hello,

This might be a bit of a silly question, but I have been noticing that running a simulation with the coastline behavior set to Beaching outputs very different results to that same simulation but with a coastline behavior set to Standstill. Is this because the particles interfere with each other once they are assumed beached? Or because of difference in movement with the circulation when the particle density is smaller? Or something else? This is mainly a question to understand how Ichthyop calculates this, so I can better plan my future simulations.

Thank you, Yotam

[barriern]

Hi Yotam.

When the particle is moved, it is falls inland:

• With beaching, the particle is killed (the mortality output is set to 4). And the particle is no more updated in Ichthyop and remains at the main position. In the post-processing, you must remove the dead particles.
• With standsill, if the particle falls inland, it is put back to its former position (therefore, it is as if it did not move at all). Therefore, all the particles should remain alive.

This might explain the different behaviors

Nicolas

[ytmben]

Hi Nicolas, thank you for the quick reply,

So with standstill, the particles return to the immediate previous position they were before they fell inland? Or to the original position of the simulation? As for the post-processing, I already remove the dead particles when plotting them, I will see if I manage to do the same when creating the density plots, thank you.

Thanks again, Yotam

[barriern]

Its the position before it fell inland, not the original position

[ytmben]

Thank you! Would you mind if I keep this issue open, in case I have any more questions about the subject later on?

[barriern]

Sure, you can leave the issue opened