The rational method for determining peak flood discharges has been used for the design of
hydraulic structures for decades. Despite the popularity of the method, little attention has …

The Rational method is widely used in the design of hydraulic structures, such as storm
sewers and culverts. Many engineers consider the Rational equation a rule-of-thumb …

KDOT engineers have expressed concern that the hydrologic methods in the current KDOT
Design Manual (Volume I, Part C, 2011) may lead to over-sizing of drainage structures in …

This report documents the development of KDOT's new rainfall tables for counties in Kansas
based on NOAA Atlas 14 Volume 8. These new tables provide rainfall depths and intensities …

Determining discharge in a stream is important to the design of culverts, bridges, and other
structures pertaining to transportation systems. Currently in Utah regression equations exist …

The Rational equation is often thought of as being less sophisticated and less accurate than
regional flood frequency equations. As such, the application of the Rational equation is …

Storm-drainage design inputs such as lag times, times of concentration and rational runoff
coefficients should be calibrated with local gaging data wherever possible. This paper …

In this study we present an equation that predicts bankfull discharge for Kansas streams
based on watershed characteristics. This equation can be used for natural channel design …

The runoff curve number (CN) and the rational runoff coefficient (C) for undeveloped land
are key inputs to common methods for estimating flood quantiles. This document describes …

Determining discharge in a stream is important to the design of culverts, bridges, and other
structures pertaining to transportation systems. Currently in Utah regression equations exist …