View Full Version : Swales - Convergence problems

November 17, 2014, 07:33 PM
I have a network with a large amount of swale links (rivers) in it which always generates the 'convergence least achieved at...' message in the SIM log which it never completes. I have reduced timesteps to 1s with no joy.

The noticed the swale link cross-sections are variable (e.g a 5m wide swale 0.5m deep may flow to a 3m wide 1m depth) and some of the feed into detention basins (which may surcharge back into the swales).

Is this geometry & reverse flow the likely source of the issues?