Rational Method definition

Rational Method means an empirical method used to determine the maximum rate of runoff based on the formula Q = CIA, where Q is approximately equal to the peak rate of flow in cubic feet per second, C is a runoff coefficient, I is the average intensity of rainfall, and A is the contributing basin area in acres.
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Rational Method means the commonly used equation for peak flow estimation known as the Rational Method.
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Examples of Rational Method in a sentence

  • The Rational Method (Chow 1964) shall be used when the drainage area for a crossing is less than 80 acres.

  • The Rational Method will be used to compute these flows for drainage areas less than 200 acres and the Small Watershed Method will be used to evaluate the impacts of the ultimate conditions.

  • This task will include delineating or revising proposed conditions internal and external drainage areas, determining Tc, land use, and computing the design and 5-, 25- and 100-year peak flows using the Rational Method.

  • Using the same methodology develops existing TP40 100-year storm event peak flows with Rational Method and using a velocity-based Time of Concentration method for the existing service areas of the Waterview Estates basins.

  • Standard Excel spreadsheets can be used for the Regression Analysis equations and the Rational Method calculations.

  • This estimate is based on both direct flow measurements taken at the site and a calculated discharge using the Rational Method.

  • Surface-water drainage controls will be analyzed and designed using the Rational Method in accordance with the Orange County Hydrology Manual.

  • Perform existing condition hydrologic calculations using the Rational Method based upon Fort Bend County Drainage District (“FBCDD”) drainage criteria for the 2‐, 10‐, and 100‐year storm events.

  • Peak runoff rates will be computed using the Rational Method (Q=CiACf).

  • Perform existing condition hydrologic calculations using the Rational Method based upon Fort Bend County Drainage District ("FBCDD") drainage criteria for the 2-, 10-, and 100-year storm events.

Related to Rational Method

  • Automatic Route Selection or “ARS” means a service feature associated with a specific grouping of lines that provides for automatic selection of the least expensive or most appropriate transmission facility for each call based on criteria programmed into the system.