Radial & Sluice Gate Operation Simulator | Discharge Table & Hydraulic Performance

Radial & Sluice Gate Operation Simulator

Discharge tables • Gate opening vs head • Energy loss • 2D schematic • Batch processing • PDF report

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📐 1. Radial (Tainter) & Sluice Gate Operation – Why It Matters

Gates control water release from dams, reservoirs, and irrigation canals. Accurate discharge estimation is critical for flood management, downstream safety, and energy dissipation. This simulator uses the orifice flow equation for submerged gates and weir equation for free flow, with discharge coefficients based on gate type and opening ratio.

Orifice flow (submerged): Q = C_d · A · √(2g·Δh)
Free flow (weir): Q = C_w · L · H^3/2
Typical C_d = 0.60–0.75 (sluice), 0.70–0.85 (radial).
Gate opening ratio (a/H_u) affects the coefficient.

🚀 2. Gate Discharge & Operation Simulator

Gate typeRadial (Tainter) gateVertical sluice gate

Gate width B (m)

Upstream head H_u (m) – from gate centreline

Gate opening a (m) – vertical opening

Downstream tailwater level (m) – 0 if free overfall

Discharge coefficient adjustment (C_d factor)

Batch CSV (width, headUp, opening, tail)

Get PDF Report via Email

CSV Template

📊 3. Gate & Flow Schematic

📈 4. Discharge vs Head & Opening (History)

📘 5. How to Use the Simulator

1. Select gate type (radial or sluice).
2. Enter gate width (B), upstream head (H_u), gate opening (a), downstream tailwater level.
3. Adjust discharge coefficient factor if needed (1.0 = standard).
4. Click "Simulate Gate" – flow regime (free/submerged) and discharge are computed.
5. 2D schematic shows water levels, gate position, and flow direction.
6. Batch CSV: upload multiple designs to generate discharge tables.
7. PDF report includes sketch and operation data.

❓ Frequently Asked Questions

❓ When is flow considered submerged?

If tailwater level is above the gate opening centreline, submerged orifice flow applies. Otherwise, free flow (weir-type) with nappe formation.

❓ Typical discharge coefficients?

Vertical sluice: C_d ≈ 0.60–0.65; Radial gate: C_d ≈ 0.70–0.80 for free flow. The tool uses a/H_u correction.

❓ Can I generate an operation table?

Yes, use the batch CSV feature: upload a list of openings for fixed head, and the tool will return discharges.

🌐 References

USBR – Gates and Valves | EM 1110-2-4205 (Hydraulic Design) | IAHR Gate Operation Guidelines

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© ERH Gate Operation Simulator – Orifice/Weir flow theory. All data processed locally.