Analytical Study on Water Pressure Lowering of Water Supply Network with Natural Flow System

Abstract

This paper presents the analytical results of water pressure lowering of water supply network at the time of an earthquake. Focusing on the phenomenon occurred in Kawagoe City at the time of the Tohoku Great Earthquake, two types of analysis are carried out, one is the sloshing analysis of water storage tank, and the other is the vibration analysis of water in pipe. The change of water pressure of pipe analysis is much larger than the case of tank sloshing. Therefor the compression behavior of water in pipe is influenced on water pressure lowering phenomenon.