Manning flow, normal and critical depth, Froude number, weir flow, rational method, time of concentration and orifice flow.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /critical-depth | $0.02 | Critical depth where Froude number is 1 (Q^2/g = A^3/T) for rectangular, trapezoidal, triangular or circular channels. |
GET /froude-number | $0.02 | Froude number V / sqrt(g A/T) and flow regime (subcritical, critical, supercritical) for an open-channel section. |
GET /manning-flow | $0.02 | Manning flow, velocity and hydraulic radius for rectangular, trapezoidal, triangular or part-full circular channels, SI or US. |
GET /normal-depth | $0.03 | Normal (uniform-flow) depth for a given discharge in a rectangular, trapezoidal, triangular or circular channel by bisection. |
GET /orifice-flow | $0.02 | Orifice discharge Q = Cd A sqrt(2 g h) for a round or given-area opening, with typical Cd by edge type, SI or US. |
GET /rational-method | $0.02 | Peak runoff Q = C i A by the rational method, from a runoff coefficient, surface type or weighted sub-areas, SI or US. |
GET /time-of-concentration | $0.02 | Time of concentration by the Kirpich formula and the NRCS lag equation, with the limits of each stated. |
GET /weir-flow | $0.02 | Discharge over a sharp-crested rectangular (Francis), V-notch or Cipolletti weir from head, SI or US units. |
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Hydraulic arithmetic computed locally from the numbers given, using standard published formulas, provided as is. Educational estimates only: not for design or code compliance. Roughness, runoff and discharge coefficients are typical values; real channels need site data and a licensed engineer. Every paid response carries a disclaimer field.