My problem consists in the procedure to be used for the collapse of Ras improvviso.Ho has tried to simulate the sudden collapse , after entering the various geometric data with a linear type :
Time Fraction Fraction Breach
0 1
0.5 1
1 1
using this expression invaded upstream does not empty .
I would like to know if the procedure I used is correct or there is another procedure to be applied .I would be grateful for the resolution of the problem.