Water Routing on Diverging-Converging Watersheds

by Necati Agiralioglu, Asst. Prof. of Civ. Engrg.; Technical Univ. of Istanbul, Istanbul, Turkey,

Serial Information: Journal of the Hydraulics Division, 1981, Vol. 107, Issue 8, Pg. 1003-1017

Document Type: Journal Paper


For a diverging-converging surface, the kinematic wave equations are solved using an implicit finite difference method. This diverging-converging representation is applicable to a natural watershed that has a leaf-shaped geometry. The results are compared with other idealistic representations. These are: plane surface, diverging surface, and converging surface. The diverging-converging model gives hydrograph values between those of converging and diverging models, depending on the geometric parameters. In general, the geometry of a watershed has important effects on the runoff hydrograph for both equilibrium and partial equilibrium conditions.

Subject Headings: Surface waves | Geometrics | Water management | Flood routing | Watersheds | Kinematic waves | Wave equations | Hydrologic models

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