In January this year, a large-scale water outage occurred in Wajima City, Ishikawa Prefecture, in order to prevent the freezing of water pipes, etc., when each household continued to flow water at the call of the city, it was too much. , A city investigation found that the water level in the water storage facility was lower than expected.
In the future, the city wants to make it known that the water to be discharged to prevent freezing should be as thick as a pencil lead.
In Wajima City, due to the record cold weather in January, water pipes burst and leaked one after another, and at the most, about 3,500 houses were cut off, and it took a week to fully restore.
In Wajima City, even in the cold wave five years ago, there was a large-scale water outage, and as a measure to prevent water pipes from freezing or bursting, the city has loosened the water faucets and let the water flow little by little. I called out Dashimizu.
As a result, the number of "water leaks" due to burst water pipes during this cold wave was about 600, which is 100 fewer than five years ago, but the number of water outages increased by more than 1,000.
When the city investigated the cause, it was found that the day before the water outage began, the amount of water distributed from the water storage facility to each household had nearly doubled compared to the same period of the previous year in the district with the highest volume. rice field.
Wajima City believes that the sudden increase in the amount of water distribution due to excessive water output at each household led to the water supply being cut off due to the decrease in the amount of water in the water storage facility more than expected.
Wajima City said, ``It is desirable to use a thickness of about the lead of a pencil to prevent freezing. I would like to call for implementation."