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Title:Methodologies for flow prediction in urban storm drainage systems
Author(s):Yen, Ben Chie
Contributor(s):Liou, Y.-C.; Sevuk, A.S.; Tsai, Y.H.; Akan, A.O.; University of Illinois at Urbana-Champaign
Subject(s):Water resource development--Illinois
Water resources development
Waste water
Drainage systems
Effluents-waste water
Flood routing
Flaw characteristics-water
Gutters hydraulics
Hydraulic design
Mathematical models
Open-channel flow
Overland flow
Safety factor
Storm water
Surface flow
Unsteady flow
Urban runoff
Geographic Coverage:Illinois (state)
Abstract:Increasing public concern on urban storm water quantity and quality problems demands a thorough review of the methodologies for flow prediction and design of urban storm drainage systems and development of improved methodologies. In this study the urban storm drainage system is considered as an integrated system of components of urban surf ace, gutters, inlets, sewer branches, junctions, manholes, and other structures. The flow equations that can be used to solve storm drainage problems are critically reviewed and the mathematical methods for solving the St. Venant equations are compared. A method to routing the unsteady flow due to rainfall and other inputs through land, surface and gutter to produce the inlet hydrograph is proposed. The results have been presented in nondimensional form for general uses. A mathematical simulation model for tree-type sewer networks is developed by using the St. Venant equations to route the inlet hydrographs through the network. An overlapping segment scheme is used to account for the backwater effects and mutual influences of the unsteady flow in the sewers. The results show clearly the importance of detention storage in the drainage system and the possibility of detention storage manipulation for flood peak attenuation. In addition to flow prediction purposes, the developed model can also be used for design of sewer systems. Furthermore, new approaches based on risk consideration are proposed for determination of design rainfall and for design of sewers and other hydraulic structures.
Issue Date:1973-08
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Genre:Report (Grant or Annual)
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright 1973 held by Ben Chie Yen
Date Available in IDEALS:2016-06-20

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