A river-side embankment cutaway exposes a permeable foundation layer and a landside exit. Change flood level, crest height, permeability and seepage path length; inspect freeboard, average gradient and ideal Darcy seepage.
• 3D scene parts: Flood-side water; embankment cross-section; permeable foundation path; seepage guide and head stations; landside exit station. • Controls: River head above foundation datum (1–6 m); Landside head (0–2 m); Levee crest height (3–7 m); Ideal seepage path length (10–60 m); Log10 hydraulic conductivity (-7–-3 log10(m/s)); Selected gradient warning threshold (0.1–1). • Live readouts: Crest minus river head (m); Average path gradient; Darcy seepage per 1 m reach (L/s); Darcy flux (m/s); Threshold minus gradient; River–land head difference (m). • Guided experiments: Overtopping exposure; Permeable foundation; Long seepage path. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
ΔH=max(Hriver−Hland,0); i=ΔH/L k=10^(logK); vDarcy=k i Q=k A i, A=2 m² per metre reach Freeboard=crest−river head
One-dimensional saturated Darcy path with uniform conductivity and linear head loss. The selected average-gradient warning is not an exit-gradient, sand-boil or piping safety factor. No slope failure, breach evolution, unsaturated flow or erosion simulation. Overtopping is an indicator with illustrative flow markers only. Try the preset experiments, then compare the live readouts with the equations.
No. This model has a single uniform path, not a two-dimensional flow field.
Yes. The river head exceeds the crest height.
One-dimensional saturated Darcy path with uniform conductivity and linear head loss. The selected average-gradient warning is not an exit-gradient, sand-boil or piping safety factor. No slope failure, breach evolution, unsaturated flow or erosion simulation. Overtopping is an indicator with illustrative flow markers only.