Flood level

Draggable river cross-section + live Manning discharge (Blogger HTML)

Cross-section points (x, elevation) — ordered left → right (meters) 0,10 5,8 10,6 15,5 20,5.5 30,7 40,10

Hydraulic inputs Channel slope (S) — bed slope (m/m) Manning's n Floodline (draggable on plot or type elevation) Catchment / External discharges (optional) Ingis Dickens Ryves Lacys

Results

Area (A m²)	Wetted Perim (P m)	Hydr. Radius (R m)	Q (m³/s)
—	—	—	—

Notes: Drag the horizontal shape on the plot to change flood elevation. The shape is editable because Plotly is configured with shapePosition edit enabled.