Water cutoff countermeasures using disaster emergency wells


Finding the contribution of emergency well to emergency water supply during chaotic conditions

November 4, 2022
Osaka Metropolitan University
Groundwater is considered both an environmental and industrial resource, but a new study indicates it is also an important resource in disaster prevention. Researchers conducted research surveys of 91 well owners and 328 welfare facilities affected by the 2016 Kumamoto Earthquake. The surveys clarified groundwater use following the earthquake and policy issues that could make the use of emergency wells more effective in the wake of future disasters. The surveys' findings provide useful data for city governments that have installed or are considering installing emergency wells.

In recent years, large-scale natural disasters around the world have caused a series of water cutoffs, which seriously affect the quality of life of disaster victims. To address this, there has been growing interest in the viability of disaster emergency wells to mitigate water cutoffs during natural disasters.

A research group led by Professor Takahiro Endo from the Graduate School of Sustainable System Sciences at Osaka Metropolitan University conducted surveys of local well owners who supplied groundwater (91 organizations) and welfare facilities representing water users (328 facilities) that were affected by the 2016 Kumamoto Earthquake. The surveys clarified the status of groundwater use after the earthquake for suppliers and users, as well as policy issues surrounding the use of emergency wells.

"Groundwater has been considered an important resource for both industrial production and the natural environment, but this research has newly clarified that groundwater is also a disaster prevention resource," explained Professor Endo.

Although there have been previous studies of groundwater use in disaster, most of these studies assessed future disasters, such as groundwater exploration techniques and estimation of groundwater availability in the event of water supply cutoffs. Groundwater is primarily provided during the chaotic period immediately after a disaster through private wells, which are scattered throughout the affected area. This makes keeping official records of groundwater usage difficult. So, up until now, emergency well usage after earthquakes was not thoroughly understood.

The surveys found that the use of emergency wells complemented the Kumamoto city government's emergency water supply by speeding up water delivery and improving access to water. On the other hand, a reasonable number of welfare facilities did not use water from emergency wells, even when they were nearby. This indicates that publicizing emergency well locations is an important policy issue.

"This new data is very useful for city governments who have already installed or are considering installing emergency wells in the near future," Professor Endo concluded.

Story Source:

Materials provided by Osaka Metropolitan UniversityNote: Content may be edited for style and length.

Journal Reference:

  1. Takahiro Endo, Tomoki Iizuka, Hitomi Koga, Nahoko Hamada. Groundwater as emergency water supply: case study of the 2016 Kumamoto Earthquake, JapanHydrogeology Journal, 2022; DOI: 10.1007/s10040-022-02547-9

Cite This Page:

Osaka Metropolitan University. "Water cutoff countermeasures using disaster emergency wells: Finding the contribution of emergency well to emergency water supply during chaotic conditions." ScienceDaily. ScienceDaily, 4 November 2022. <www.sciencedaily.com/releases/2022/11/221104093243.htm>.

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