Hydraulic Grade Lines in Urban Stormwater Systems -Do they Predict Surcharge Conditions?

Publisher:
Engineers Media Pty. Ltd.
Publication Type:
Journal Article
Citation:
Australian Journal of Water Resources, 2003, 6 (2), pp. 169 - 176
Issue Date:
2003-01
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The 1977 edition of Australian Rainfall and Runoff introduced the concept of Hydraulic Grade Lines (HGLs) as a measure of the surcharge potential for piped or underground urban stormwater drainage systems. This concept was included also in the 1987 edition of Australian Rainfall and Runoff. As a result of these publications, many authorities vested with management of urban stormwater drainage systems use the HGL to locate potential surcharges from their underground stormwater drainage systems. This acceptance of the importance of HGLs for the prediction of surcharge conditions in underground stormwater drainage systems, however, has been without serious consideration of the hydraulics of underground stormwater systems.
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