Model Choice and Scale in Urban Drainage Design

by David F. Kibler, Pennsylvania State Univ, University, Park, PA, USA,
George A. Krallis, Pennsylvania State Univ, University, Park, PA, USA,
Marshall E. Jennings, Pennsylvania State Univ, University, Park, PA, USA,

Document Type: Proceeding Paper

Part of: Engineering Hydrology


This paper addresses the question of model choice and scale by comparing various model applications to a 95-acre gaged catchment, known as the Lake Hills watershed, in Bellevue, Washington. The main objectives here was to compare alternative procedures for establishing flood frequency curves in a small urban watershed, recognizing that in the Lake Hills system, the authors had access to two years of rainfall-runoff data collected by the USGS. A secondary issue, which became critical to the primary objective, was the best method of distributing hourly rainfall amounts in 5-minute intervals so as to utilize long-term hourly rainfall records in simulating the small urban catchment.

Subject Headings: Drainage | Hydraulic design | Scale models | Catchments | Lakes | Flood frequency | Municipal water | Rainfall frequency | Washington | United States

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