Development of infiltration factors for the estimation of urban separate wastewater flow in the Gippsland water catchment

Elvy, Michelle Catherine (2004) Development of infiltration factors for the estimation of urban separate wastewater flow in the Gippsland water catchment. [USQ Project]


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The estimation of wastewater flows is a fundamental requirement in the
design of successful wastewater systems. The sizes and capacities of all
major components are dependant on the predicted amount of wastewater
flow that will originate from the contributory areas within the proposed
The reliability of flow estimates depends on the accuracy of many
assumptions. These include the future water demand and resultant
wastewater production, population growth or decline, population density
variations, socioeconomic changes, land use changes, and the maintenance
of the wastewater system infrastructure. It is essential that the wastewater
system has adequate capacity for peak wet weather flow, but can also
function satisfactorily at minimum flows without operational problems
(Great Lakes Upper Mississippi River Board of State Sanitary Engineers
1978, p. 12).
The Colombo formulae (1) and (2), is a theoretically derived formula used
to predict peak wet weather flow in separate wastewater systems. This
formula has been by Melbourne Metropolitan Board of Works and Sydney
Metropolitan Board of Works since the late 1960s (Coulsen, J 2004, pers.
comm., 15 June), and is currently used at Gippsland Water. -- Complete abstract not reproduced here: see main document for complete abstract.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering (Up to 30 Jun 2013)
Date Deposited: 11 Oct 2007 00:11
Last Modified: 02 Jul 2013 22:29
Uncontrolled Keywords: wastewater systems, flow estimates, Colombo formulae, permanent and storm infiltration, Gippsland region
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090508 Water Quality Engineering
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400499 Chemical engineering not elsewhere classified

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