Pipes in distribution systems often become tubercolated,
which can lead to an increase in the roughness
of the pipe wall and in a reduction of the pipe diameter.
Many model calibrations allow for adjusting the
roughness coefficients alone, often neglecting the reduction
in pipe diameter. Such oversights can have a significant
effect on the prediction of correct flow velocity.
This article explores the relationship between
pipe roughness and effective pipe diameter. On the
basis of a series of fieldwork measurements and a
modeling study, the authors make several conclusions,
including: calibrating models using
changes in pipe wall roughness to describe measured
pressure data may be insufficient to accurately
model the performance of the system; and, ignoring
the reduced effective diameter of the pipe
can lead to incorrect predictions of hydraulic
capacity. Includes 11 references, figures.
| Edition : | Vol. 96 - No. 4 |
| File Size : | 1
file
, 4.5 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 9 |
| Published : | 04/01/2004 |
