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Inverse transients to define deficiencies in pipelines
Expanded Title:A major shortcoming in the optimal utilisation of water distribution systems is the uncertainty about the physical status and the difficulty to identification operational deficiencies. The two major problems reducing the hydraulic efficiency is the presence of air and leaks in pipelines. A previous study by the WRC study (Report 1177/1/04) reflected the influence of air on the hydraulic capacity of pipelines. Another major problem with aging infrastructure is the occurrence of leaks. Both the location and presence of air and leaks are difficult establish in a cost effective way. Numerous methods to locate air and leaks are available, none of which is non-intrusive and non-interruptive. This study reviewed the use of inverse transients as a non-intrusive, non-interruptive and cost effective way to locate leaks and localised air pockets in pipelines. The procedure is based on the recording and assessment of the propagation of an induce pressure variance (waves) generated from a rapid change in flow rate through the pipeline and to identify reflecting waves which are rebounding/reflecting from a leak or an air bubble. Based on the findings from the field work, the validity of this technique have been established and with further field tests and the development of a guide on the use of Inverse Transients it could be commercially applied to establish deficiencies in the quest for the optimal management of the water asset infrastructure of South Africa .
Date Published:01/09/2012
Document Type:Research Report
Document Subjects:Drinking water - Water supply
Document Keywords:Hydrology
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:1721/1/12
ISBN No:978-1-4312-0331-4
Authors:Van Vuuren F
Project Leader:van Vuuren F
Project No:K5/1721
Originator:WRC
Organizations:University of Pretoria
Document Size:2 420 KB
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