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Title: 山地流域における土砂生産と土砂流出の量的・時間的な関係
Other Titles: Relationship between Sediment Supply and Transport Processes in Miyagawa Dam Catchment
Authors: 今泉, 文寿  KAKEN_name
Sidle, Roy C.
Author's alias: IMAIZUMI, Fumitoshi
SIDLE, Roy C.
Keywords: 土砂生産
土砂流出
ダム堆砂
宮川ダム
渓床堆積物
sediment supply
sediment transport
dam deposits
Miyagawa Dam
channel deposits
Issue Date: 1-Apr-2005
Publisher: 京都大学防災研究所 / Disaster Prevention Research Institute Kyoto University
Journal title: 京都大学防災研究所年報. C = Disaster Prevention Research Institute annuals. C
Volume: 48
Issue: C
Start page: 209
End page: 217
Abstract: 本研究では、三重県宮川ダム流域において、空中写真判読、ダム堆砂量の解析、現地調査等を行い、土砂生産と土砂流出の量的・時間的な関係、およびその関係に影響を及ぼす要因を検討した。ダム湖周辺における土砂流出のタイミングは大きな降雨流出イベントのあった年と一致する。また、土砂生産の影響は土砂流出に数年以上継続する。これらの特性は、崩壊・土石流による堆積土砂の堆積位置に影響を受けていると考えられる。
Because sediment supply affects sediment yield, knowledge of the relationship between sediment supply and transport are needed to estimate catchment-scale sediment yield. This study investigates timing and volume of sediment supply and transport based on aerial photo interpretation and volume of sediment deposits behind the dam in Miyagawa Dam catchment. We discuss the factors that affect the relationship between sediment supply and transport processes. Timing of sediment transport around the dam lake corresponds to large rainfall-runoff events. Sediment supply affects sediment yields for more than several years; this influence depends on the position of landslide/debris flow deposits in the catchment.
URL: http://www.dpri.kyoto-u.ac.jp/dat/nenpo/no48/48c0/a48c0p22.pdf
URI: http://hdl.handle.net/2433/26588
Appears in Collections:No.48 C

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