# A storm event occurred on Falls Creek Watershed that produced a rainfall pattern of 5 cm/hr for the first 10 min, 10 cm/hr in the second 10 min, and 5 cm/hr in the next 10 min. The watershed is divided into three subbasins (see Fig. P4-14), with the unit hydrographs given in the following table. Subbasins A and B had

A storm event occurred on Falls Creek Watershed that produced a rainfall pattern of 5 cm/hr for the first 10 min, 10 cm/hr in the second 10 min, and 5 cm/hr in the next 10 min. The watershed is divided into three subbasins (see Fig. P4-14), with the unit hydrographs given in the following table. Subbasins A and B had a loss rate of 2.5 cm/hr for the first 10 min and 1.0 cm/hr thereafter. Subbasin C had a loss rate of 1.0 cm/hr for the first 10 min and 0 cm/hr thereafter. Using a simple lag routing method (time shift the hydrograph by K), determine the storm hydrograph at point 2. Assume a lag time K of 30 min.

Ten-Minute Unit Hydrographs

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## Hydrology and Floodplain Analysis

5th edition

Authors: Philip B. Bedient, Wayne C. Huber, Baxter E. Vieux

ISBN: 978-0132567961