| Project/Area Number |
12306008
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林学
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
ARAYA Tohru Hokkaido Univ., Grand.School of Agr., Prof., 大学院・農学研究科, 教授 (00001462)
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| Co-Investigator(Kenkyū-buntansha) |
NAKASIMA Yuhki Yamagata Univ., Fac.of Agr., Prof., 農学部, 教授 (70038298)
KUROKI Mikio Hokkaido Univ., Grand.School of Eng., Asso.Prof., 大学院・工学研究科, 助教授 (50002001)
YAMADA Takashi Hokkaido Univ., Grand.School of Agr., Asso.Prof., 大学院・農学研究科, 助教授 (20333635)
MARUTANI Tomomi Shinshu Univ., Fac.of Agr., Prof., 農学部, 教授 (40112320)
MAITA Hideji Tsukuba Univ., Institute of Agriculturural and Forest Engineering, Asso.Prof., 農林工学系, 助教授 (50015864)
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| Project Period (FY) |
2000 – 2003
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| Keywords | sediment deliver / sediment storage / sediment production / source-to-sink / rainfall magnitude / geology / catchment scale / land use |
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| Research Abstract |
Understanding how the sediment is transported through a catchment is a key issue for food and environmental resources management. Our research project aims to clear the sediment delivery ratios linking with catchment scale, climatic and geological settings and land use in Rim Pacific countries. The sediment production, storage and delivery process in source-to-sink (mountain to sea) sedimentary systems spaced during several square kilometer and thousands square kilometer was examined. The research was conducted in not only Hokkaido to Kyushu in Japan but also New Zealand, Australia and China in Rim Pacific. The result was summarized that the duration and magnitude of sediment storage was determined by catchment scale, averaged catchment slope and rainfall magnitude, and the flow rate and annual volume of suspended sediment were controlled by these factors Adding to it, the flume experimental study available for developing hydrological model ha been done. The influences of sedimentary cascades on riparian and aquatic ecological systems were also examined. The research project managed the international workshop for the source-to-sink sediment transport in catchment scale in Sapporo in 2003, which has invited sediment researchers from Australia, New Zealand, USA, Thailand and Korea. To mitigate and prevent sediment disasters the source-to-sink sedimentary cascades affected by changing catchnment system were successfully cleared in this study.
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