Japan Geoscience Union Meeting 2016

Presentation information

International Session (Poster)

Symbol H (Human Geosciences) » H-SC Social Earth Sciences & Civil/Urban System Sciences

[H-SC02] Coupled Human-Water Dynamics across Scales: Observations, Understanding, Modeling, and * Management

Wed. May 25, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Taikan Oki(Institute of Industrial Science, The University of Tokyo), Naota Hanasaki(National Institute for Environmental Studies), Murugesu Sivapalan(University of Illinois at Urbana-Champaign), Giuliano Di Baldassarre(Uppsala University)

5:15 PM - 6:30 PM

[HSC02-P04] Conservation and Restoration of Wells in Ogaki City

*Syoukan Kou1 (1.Graduate School of Horticulture, Chiba University)

Keywords:Ogaki, Wells, Conservation, Restoration

1. Research Purpose and Background
Flowing wells, which naturally supply an abundance of quality groundwater, have been utilized in Ogaki City since the Edo Period. Wells survived as a connecting factor among the people in each local community. The purpose of this research is to clarify the history of the restoration of wells in Ogaki City and their current conditions.
2. Study Methods
Bibliographical research and field research were conducted in order to understand the history of restoration of wells in Ogaki City. Field research was organized after studying the current conditions of the wells, to uncover utilization and their design methods.
3. History of Conservation and Restoration of Wells in Ogaki City
The land of Ogaki City was formed by sedimentation of a river, and this enabled the formation of flowing wells, which naturally supplied an abundance of quality groundwater from the Edo Period. In the late 1960’s, during the period of high economic growth, most flowing wells disappeared due to groundwater utilization for factories, which caused a severe drop of the groundwater level. In recent years, factories have been shut down in the consequence economic stagnation and the fall of the textile industry. This resulted in a rise of the groundwater level, and the government together with citizens and volunteer organizations started cooperating to utilize water for city planning.
4. Conservation and Restoration of Wells
(1) Environmental Development by Equipping Wells
Restoration of wells was initiated mainly in the castle town around Ogaki Castle, which has always supplied ample amount of groundwater since the Edo Period. The newly equipped wells had a classic design which imitated a natural pond as well as other unique ones. The surrounding environment around the wells became naturally with planting, and now serves as a recreational area for citizens. The wells and their surrounding environment are managed through the cooperation between the government and the local residents. Due to sharing water and cleaning wells, wells are contributing to energize local community, serving as a central point for the citizens to exchange information.
(2) Environmental Educational by Utilizing Wells
There are pond and water ways derived from the well of Kagano Hachiman Shrine in Ogaki City; and Smallhead Sticleback, fresh water fish which is designated as an endangered species, inhabits in this pond and water ways. Environmental education has been implemented so that the community would feel attachment to nature. An annual program has been developed for the primary and middle schools in the city, with which students observe the wells, ponds, surrounding environment of the water ways, and Smallhead Stickleback. They also conduct water quality survey and learn how Ogaki City manages its environment.
(3) Earth Thermal Energy Generation by Well Water
Ogaki City has been discussing earth thermal energy utilization since 2013, in the course of energy efficiency measures. The temperature of well water is stable throughout the year; therefore, it can be utilized as an energy source for air conditioning and water heating. As a result, since June 2015, the city has been distributing subsidies to offices, corporations, and organizations, which would install earth thermal energy heat pump facilities. This is, as mentioned above, one of the energy efficiency measures.
5. Conclusion
In Ogaki City, wells created a city environment which incorporates nature. At the same time, they are also utilized for the promotion of environmental education and for energy efficiency measures. Wells made the nature and life of the city rich, and contributed to energize local communities. Participation and cooperation among the diverse stakeholders, including local residents, in conservation and restoration of groundwater would be expected for the future.