5:15 PM - 6:45 PM
[HCG25-P03] Toward sustainable use of water resources in mountainous areas Water characteristics and culture survey
Keywords:Hydraulic Features, Value of local water, History & Culture
In Japan, rivers, wells, and rainwater were the sources of water for daily life in the period before the water supply system was developed, but now the water supply penetration rate has reached 98.2% and traditional water is still used in some areas. There is a positive sentiment among residents for the taste of that water, and we feel that there is a great deal of interest in water. In mountainous areas in particular, it is becoming difficult to maintain water sources due to the aging of the population, and various water-related issues are believed to exist.
From this point of view, we felt that it is necessary to understand hydraulic characteristics in order to be able to make technical proposals that are in line with regional characteristics and culture, and also to learn about the history and culture of water and organize perspectives that view water in the region as an asset. The objective of the project was to investigate the value of water from the residents' perspective, and to explore and summarize sustainable ways to utilize the water.
As a research method, we organized the regional characteristics of Koshu City, Yamanashi Prefecture; Tosa Mountain, Kochi Prefecture; and Sugawa Town, Nara Prefecture, to understand the characteristics of soil and water sources. For water quality analysis, we collected water samples once or twice a month and measured pH and EC, measured inorganic dissolved substances using ion chromatography, analyzed isotopes of nitrate nitrogen, and investigated residents' water use through interviews.
The study results showed that the water in Yamanashi and Kochi prefectures was surface water or groundwater commonly found in Japan, while the water in Nara prefecture was groundwater stagnating at a deeper level. The isotope results for nitrate nitrogen showed anthropogenic influences in all regions.
As future tasks, we plan to share the water quality situation with local residents, conduct a detailed survey of water use patterns, and conduct further research on residents' expectations and requests, as well as on water management systems.
From this point of view, we felt that it is necessary to understand hydraulic characteristics in order to be able to make technical proposals that are in line with regional characteristics and culture, and also to learn about the history and culture of water and organize perspectives that view water in the region as an asset. The objective of the project was to investigate the value of water from the residents' perspective, and to explore and summarize sustainable ways to utilize the water.
As a research method, we organized the regional characteristics of Koshu City, Yamanashi Prefecture; Tosa Mountain, Kochi Prefecture; and Sugawa Town, Nara Prefecture, to understand the characteristics of soil and water sources. For water quality analysis, we collected water samples once or twice a month and measured pH and EC, measured inorganic dissolved substances using ion chromatography, analyzed isotopes of nitrate nitrogen, and investigated residents' water use through interviews.
The study results showed that the water in Yamanashi and Kochi prefectures was surface water or groundwater commonly found in Japan, while the water in Nara prefecture was groundwater stagnating at a deeper level. The isotope results for nitrate nitrogen showed anthropogenic influences in all regions.
As future tasks, we plan to share the water quality situation with local residents, conduct a detailed survey of water use patterns, and conduct further research on residents' expectations and requests, as well as on water management systems.