International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991
10: Country Reports and Future Outlooks
Water Of Island In Japan
Kyoto University, Japan
Shimane University, Japan
So far the water situation of small islands far from main land of Japan was
especially very serious. The water had been developed from rainfall by several
traditional methods. But there was no enough studies on suitable apparatus and
facility to store that rainfall. Then many islands were very strict in water utilization.
Lately Japan government had issued big budget to improve this water shortage in
remote islands, and they had developed the water of remote islands introducing
various technology and engineering methods.
We would like to show the comparison between old situation and present situation
of water resources of remote islands.
Rainfall distribution of island in Japan has big difference between north part
and south part. But most serious part is the islands in Seto Inland Sea. Then
we had performed field survey on water situation on this area. The smallest island
was Uwoshima island and the most developed island was Nakajima island.
(old situation of water in islands)
- Rain water cisterns were used on inconvenient parts of islands
- People has clustered in flat: places along seashore
- People has been endured serious shortage of water
- Ground water had been developed, but sometimes salt water was contained.
(present situation of water in islands after development by government)
- Ground water was developed by wells and pipe line system were introduced.
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