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Reducing Peak RDII Flow Rates - Case Studies and Protocol (Paperback)
Loot Price: R3,387
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Reducing Peak RDII Flow Rates - Case Studies and Protocol (Paperback)
Series: WERF Research Report Series
Expected to ship within 12 - 17 working days
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The purpose of this research project was to examine construction
projects that successfully reduced Rainfall Dependent
Infiltration/Inflow (RDII). The research began with a literature
review of all published records describing RDII removal projects.
Initially, the review identified many projects; however, subsequent
evaluation of available information revealed several important
realities. First, most RDII removal projects in the country go
undocumented. Second, of the RDII removal project summaries that
have been published, few provide good data. Third, data gathering
and analyses for this report were hampered by lack of
documentation, lost or unavailable monitoring data, and weaknesses
in monitoring techniques. Projects with sufficient information
describing the conditions before the RDII removal project received
a detailed analysis. In all, the case studies from the six agencies
presented in this report (1) document before-and-after RDII levels,
(2) quantify the RDII reduction achieved, and (3) describe the
cost-effectiveness of the removal. As more than one project was
documented for some agencies, a total of 12 RDII projects received
review. The projects examined include both those that
?successfully? reduced RDII and those that did not. In general, the
conclusion was that utilities run the risk of not removing
significant RDII unless they address private sewer laterals. The
only cases examined where significant RDII was removed were those
that addressed private sewers or inflow sources. A major
recommendation of this report was to establish a standard reporting
protocol for documenting RDII removal projects. This protocol
details what specific information should be provided when
documenting an RDII removal project and how to perform an
evaluation of RDII removal effectiveness. The protocol touches on
issues ranging from flow meter maintenance to statistical analysis
of flow data. By using the proper documentation recommended in this
report, communities allow others who are preparing to perform
similar work to examine and utilize the results of any RDII removal
project. This publication can also be purchased and downloaded via
Pay Per View on Water Intelligence Online - click on the Pay Per
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