@article{oai:tsukuba.repo.nii.ac.jp:00009272,
 author = {今泉, 文寿 and Imaizumi, Fumitoshi and Sidle, Roy C.},
 issue = {F3},
 journal = {Journal of geophysical research: Earth surface},
 month = {Aug},
 note = {application/pdf, Linkages between sediment supply by episodic geomorphic processes, obtained from aerial photographs and field surveys, and sediment transport, estimated from changes in sediment deposition behind a large dam, were investigated in the Miyagawa Dam catchment, central Japan. A total of 6667 landslides were confirmed in the period from 1965 to 2000 based on seven temporal pairs of aerial photographs. Both the occurrence
of landslides and discharge into the dam lake affect sediment yield, indicating that
fluvial systems in Miyagawa Dam catchment are supply-limited with respect to
sediment. Sediment yields are not only affected by the initial failed volume of
landslides but also the mobility of landslides and debris flows. In Miyagawa Dam
catchment, percentages of landslides reaching channels varied from 56% in 1997–2000
to 75% in 1976-1981, and were correlated with maximum hourly rainfall. In addition,
the mobility of debris flows was higher during periods with high maximum
instantaneous discharge compared to lower discharge, suggesting that the water content
both in initially failed materials and transported sediment controlled their mobility.
Topography also affected the mobility of landslides/debris flows. For catchments >0.1
km2, the percentage of channel network length impacted by debris flows decreased with
increasing catchment area due to reduced channel gradient. Thus, both the magnitude of
rainfall-runoff events and catchment topography affect how landslide sediment contributes to sediment yield at the large catchment scale.Index terms: Hydrology (1800), Catchment (1804), Debris flow and landslides (1810), Hillslope geomorphology (1826); and Sediment transport (1862).
Key words: landslide, debris flow, sediment budget, dam deposits, forest roads, and
hillslope-channel linkages},
 title = {Linkage of sediment supply and transport processes in Miyagawa Dam catchment, Japan},
 volume = {112},
 year = {2007}
}