Anti‑Scour / Scour Depth – Multi‑Formula Tool

Compare scour / anti‑scour estimates using Lacey, Shields, Izbash and HEC‑18 (CSU) pier scour.
SI units throughout (m, s, m³/s, kg/m³, Pa).

1 Calculations

Select a formula family and provide the corresponding input parameters.
Lacey options are typical for anti‑scour depth at barrages & headworks; HEC‑18 for local pier scour.
Max scour depth dmax ≈ Kloc · R (R = normal scour depth from Lacey).
For scour‑depth‑based formulas: dfoundation = γsafety · dmax or ys.