Many of the existing guidelines for surge analysis
and design are overly simplified and inadequately
address the complexity of transient phenomena. This
article reviews several guidelines found in the literature
and systematically details how these rules break down.
To demonstrate the limitations inherent in the rules,
the authors also include case studies comparing a simplified
analysis with a comprehensive one.
One of the challenges in managing distribution system
water quality is safeguarding against contaminants that
can intrude into pipes through leaks from reduced- or
negative-pressure transients. Simplified rules can lead to
inaccurate results and insufficient surge protection. Water
suppliers need comprehensive surge analyses that account
for specific system characteristics such as pipe connections,
dead ends, and nonuniform pipelines as well as
complex factors such as wave reflection. If the water
community is to continue providing safe drinking water,
all of the conditions associated with transients must be
considered in system design and operation. Includes 17 references, tables, figures.