Froelich Dam Breach Predictor Equations

b = 9.5 K₀(V_sH)^0.25

T = 0.59 (V_s^0.47)H^-0.91

• b = Average Breach Width (ft),
• K₀ = 0.7 for Piping & 1.0 for Overtopping Failure
• V_s = Storage Volume (ac-ft)
• H = Selected Failure Depth (ft) above Breach Bottom
• T = Time of Failure (hrs, ~H/120 or Minimum of 10 Min)