Contrary to what the name might imply, is not a standalone software package. It is a Microsoft Excel-based engineering workbook (a .xls or .xlsm file) developed by hydraulic engineering groups or academic institutions (e.g., IIT Roorkee, USBR, or private engineering GitHub repositories).
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coordinates for the downstream nappe and the compound circular curves for the upstream face. : Accounts for contractions caused by piers ( Kpcap K sub p ) and abutments ( Kacap K sub a ) using the formula: .
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Some Ogee tools require Excel's "Solver" for optimization. Go to File > Options > Add-ins . At the bottom, select Excel Add-ins and click Go . Check Solver Add-in and click OK.
The downstream profile of the crest is generally defined by the power law equation:
Many Ogee spreadsheets use to optimize the crest curve transition. ogee spillway designxls install
Because this query focuses on a specialized engineering software file, the response below bypasses strict visual scannability rules to deliver a naturally formatted, standard engineering guide and article.
The spreadsheet automates several labor-intensive calculations. Understanding the underlying formulas ensures you can audit the tool's outputs accurately. The Discharge Equation
Y=-0.50⋅X1.85Hd0.85cap Y equals negative 0.50 center dot the fraction with numerator cap X to the 1.85 power and denominator cap H sub d to the 0.85 power end-fraction 3. Creating the Coordinate Generator Matrix Contrary to what the name might imply, is
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An is a critical hydraulic structure featuring an S-shaped (ogee) profile designed to mirror the naturally forming lower nappe of a fully ventilated fluid jet flowing over a sharp-crested weir. By matching this natural curvature, the spilling water remains in constant contact with the concrete structure. This completely eliminates negative pressures along the face, eliminating the risk of destructive cavitation , and allows the structure to discharge up to 25% more volume than a standard broad-crested weir at the equivalent design head.
An ogee spillway is one of the most critical hydraulic structures used in dam engineering. Its characteristic S-shaped curve is mathematically designed to match the profile of the lower nappe of a ventilating water sheet flowing over a sharp-crested weir. By mimicking this natural fluid trajectory, the ogee profile maximizes discharge efficiency while minimizing sub-atmospheric pressures that could induce catastrophic cavitation. : Accounts for contractions caused by piers (
An ogee spillway features an S-shaped curve that closely mimics the underside of a flowing water sheet (nappe) over a sharp-crested weir. The profile is split into two main zones relative to the highest point (the crest apex):