In Kawasaki city, we set 562 water leakage survey sections that divide the small-diameter pipes of about 2,200 kilometers in the city into about 4 kilometers, and prevent underground accidents by continuously conducting underground water leakage surveys for each section. The pipeline information system introduced by Kawasaki city has undergone with the addition of a number of proprietary functions that constitutes an efficient system. One of its proprietary functions is the interlink function with leakage inspection equipment. Kawasaki city carries out underground water leakage studies for small diameter pipes using leakage inspection equipment on an ongoing basis to prevent hazards that can be caused by leakages and ensure the early detection of leakages. Sound pressure data from leakage inspections are imported to the system, based on which the system displays alerts, creates charts of sound pressure distributions, and displays variations over time. The scope of inspections is narrowed down by using these functions to identify areas. With regard to the rotation of underground leakage inspections that currently travels the entire city over a period of two years, one specific method moving forward would be to define leakage inspection priorities for the leakage inspection sectors in the city, review the districts with high and low probabilities of leakages, and reflect this review on underground leakage inspections. It was possible to set an efficient circulation year in consideration of the priorities.

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[in Japanese]

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