1986 Fiscal Year Final Research Report Summary
Historical Geography of Systems of Irrigation and Land Use in Border Zones of Jori Area
| Project/Area Number |
59410016
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Human geography
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| Research Institution | Shiga University |
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Principal Investigator |
KOBAYASHI Kentaro Professor Shiga University,Faculty of Education, 教育学部, 教授 (60024923)
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| Co-Investigator(Kenkyū-buntansha) |
NOMA Haruo Asist.Professor Shiga University,Faculty of Education, 教育学部, 助教授 (00131607)
TAKAHASHI Seiichi Professor Shiga University,Faculty of Education, 教育学部, 教授 (00025082)
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| Project Period (FY) |
1984 – 1986
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| Keywords | Jori / irrigation system / irrigation area / land use system / paddy field / 開発過程 |
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| Research Abstract |
Our research fields are divided into two groups, Ohmi Basin and outside of Ohmi Basin. In Ohmi Basin, we investigated distribution and surviving land divisions of Jori system, its geomorphological conditons, systems of irrigation and land use in four fields, (1) Inukamigawa Fan and low terrace of the River Seri, (2) valley plain of the River Yasu and Soma in Koga Hill, (3) alluvial plain in the north-eastern part of the basin and (4) lake plain adjacent to steep fans in the north-western part of the basin. On the other hand, outside Ohmi Basin, we selected three regions where border zones of great Jori area have the differnt conditions from Ohmi Basin, (1) the Saga Plain where the vast coarstal reclaimed land abuts on the great Jori area, (2) the West Sanuki Plain where main irrigation depends on a large number of ponds and springs and (3) the Seimou Plain where the end of the volcanic foot of Mt. Haruna buries the border zone of great Jori area and excavation of Jori paddy fields are on the increse recently. By these field researches, we found that great Jori area in main parts of plains have relatively stable land use conditions because many efforts for maintenance and improvement of irrigation systems have been poured into these area through long historical age, in the border zones of great Jori area, however, distributions and surviving land divisions of Jori system and systems of irrigation and land use are extremely various owing to geomorphological and geological conditions and historical backgrounds of each regions and their paddy fields were relatively unstable.
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