Hi,
I am solving the estimation of breach parameters (earth dams with concrete face slab) using empirical equations and physically.based model.
But I have a large differencie between emiprical equations results and physically-based model result, for example:
Empirical quations:
– Breach bottom width: circa 30 m
– Breach failure time: 0,5 – 1,0 hrs
BREACH (Fred):
– Breach bottom width: 4,8 m
– Breach failure time: 15,73 hrs
Can you tell me, where is the the problem?
regards
Robert