The blackout of '03 made municipal water storage a serious issue. Even though the blackout itself is a distant memory, public works directors and water system personnel continue to grapple with how to maintain enough storage in community distribution systems. Luckily, a general rule of thumb can be applied that combines best practices and regulations in a simple formula.
Determining Distribution Storage Needs (Opflow) author Murat Ulasir, PhD, PE, explains that while most community decisions regarding storage amounts are driven by regulatory standards, engineering judgments, community need and financial capacity, the two most important factors are:
-Regulations
-Functional design considerations.
Regulations establish minimum storage capacity based on average daily consumption, peak demands and whether the community provides fire protection.
Functional design considerations include three basic design components:
-Equalization or supply volume (supply volume)
-Fire protection volume (fire volume)
-Volume for other emergencies, such as power outages or water main breaks in supply lines (reserve volume).
For more details on calculating water storage volume, including a handy rule of thumb calculation, read the rest of the how-to article from Opflow magazine:
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