Synthetic Design Hyetograph and Rational Runoff Coefficient

by Jong-Song Chien, (A.M.ASCE), Manager; Environmental Engrg., John David Jones and Assocs., Inc., Cuyahoga Falls, Ohio; formerly, Mgr., American Consulting Services, Inc., Minneapolis, Minn.,
Simsek Sarikelle, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Univ. of Akron, Akron, Ohio,

Serial Information: Journal of the Irrigation and Drainage Division, 1976, Vol. 102, Issue 3, Pg. 307-315

Document Type: Journal Paper


A simple method of establishing the synthetic design hyetograph is presented. The method is based on rainfall intensity-duration-frequency curves with simple computation. The method incorporates the rainfall duration, rainfall depth, and the advancing storm patterns. In addition, a method of computing the average runoff coefficient for the Rational Method is developed. This method is predicated on the principle of mass conservation using Horner's field data. Examples are given for the establishment of synthetic design hyetograph and its application to the determination of average runoff coefficient. The methods presented are useful tools for drainage analysis.

Subject Headings: Rainfall duration | Hydrologic data | Rainfall intensity | Runoff | Rainfall frequency | Curvature | Computing in civil engineering | Storms

Services: Buy this book/Buy this article


Return to search