Secondary drainage method at time of flooding
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United States of America
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Feb 11, 2025
Grant Date -
Jan 19, 2023
app pub date -
Dec 15, 2020
filing date -
Dec 15, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
The present application provides a secondary drainage method for use at the time of flooding. A rainwater storage tank is provided, drainage pipes are installed between positions in which flooding of land or of property occurs and the rainwater storage tank, and inflow switching valves are installed in portions where water flows in from the drainage pipes to the rainwater storage tank. As a general rule, the flow of water into the rainwater storage tank is prevented by switching the inflow switching valves during the initial stages of a localized severe rain storm or of river flooding. After the wide-area flooding of land has receded, the inflow switching valves are opened, guiding the water in the locally remaining zones of flooded land or of flooded property into the rainwater storage tank, and allowing the localized flooding of land or of property to be eliminated at an early stage.
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