This paper describes the results of a recently completed American Water Works Association
Research Foundation (AwwaRF) and Kiwa funded project. The objectives of this project were
to: identify the criteria for assessing the water quality benefits of flushing operations;
develop a methodology (and software) for conducting cost-benefit analysis for a utility's main
flushing program; and, evaluate the costs and benefits of flushing.
The recommended 6-step approach to quantifying the costs and benefits of flushing consist of:
identifing current flushing strategies (e.g. spot flushing, stagnant area flushing, and system-wide
flushing) and methods (conventional, unidirectional, continuous blow-off); defining flushing
objectives (e.g. enhance chlorine residual); identifing benefits, costs, and associated
performance measures (e.g., number of customer complaints reduced per unit cost); organizing
the data collection process; implementing changes in the flushing program; and, evaluating
alternative flushing practices.
A software program was developed to compare flushing programs and assess their costs and
benefits. The program was tested at participating water utilities. This paper describes a typical
use of the software program based on actual data collected through the surveys and utility case
studies.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 340 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 9 |
| Published : | 09/29/2004 |
