Kinematic Wave Nomograph for Times of Concentration

by Robert M. Ragan, Prof. and Head; Dept. of Civ. Engrg., Univ. of Maryland, College Park, MD,
J. Obiukwu Duru, Sr. Envir. Planner; Maryland-Natl. Capital Park and Planning Commission, Riverdale, MD,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 10, Pg. 1765-1771

Document Type: Journal Paper


Recent studies indicate that the kinematic wave model provides a good approximation to the rising side of the overland flow hydrograph in most cases that are of interest in flood hydrology. A nomograph based on the kinematic wave formulation is proposed as a design aid for determining the time of concentration for overland flow. Results obtained with the kinematic wave model compare favorably with those obtained experimentally by the Corps of Engineers and Carl F. Izzard.

Subject Headings: Kinematic waves | Overland flow | Hydrologic models | Freight transportation | Approximation methods | Hydrographs | Floods | Flow duration

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