Late Quaternary Slope Development of Valley-head Area in the Northern Margin of the Kitakami Mountains, Northeastern Japan

Human impacts on infilling rates of hollows in landslide‐prone areas of western Japan: Estimation from radiocarbon dates and high‐resolution DEMs

“…As the filling process progresses over a long period of time (i.e., more than 100 years), analysis for a longer time scale is required. Some studies have discussed the evolution of hollows from radiocarbon age in colluvium (Crozier et al, 1990;Furuichi, 2015;Hales et al, 2012;Li & Tamura, 1999;Reneau et al, 1991;Tamura et al, 2002;Yoshiki, 1993). Tamura (1999), andTamura et al (2002) measured the 14 C ages at various topographic units in a hollow and estimated that the landslide frequency was on the order of 10 3 years for relatively upper hollows near a ridge, whereas it was closer to 10 2 years for middle to lower hollows near channel heads.…”

Migration of channel heads by storm events in two granitic mountain basins, western Japan: Implication for predicting location of landslides

“…However, a stream flow is seldom generated around migrated channel heads, and an extended channel section becomes buried by sediment supply. Indeed, soil recovery and burial of past landslide scars has also been documented in various environments by radiocarbon dating (e.g., Reneau et al, 1986Reneau et al, , 1990Crozier et al, 1990;Yoshiki, 1993;Li and Tamura, 1999;Tamura et al, 2002;Furuichi, 2015) or field survey (Trustrum and De Rose, 1988;Shimokawa et al, 1989;Shimokawa, 1991;Smale et al, 1997).…”

Differences in Form and Regolith Characteristics between the Upper an Lower Segments of Slopes in a Watershed in the Omatsuzawa Hills, Northeastern Japan

“…Reports of occurrences of present-day landslides (Miyagi and Tamura, 1987;Hatano and Oyagi, 1988) and the tephrochronological investigations of hillslope micro-landf orms (Yanai, 1989;Yoshiki, 1993) have demonstrated that the recent active hillslope processes are concentrated in the lower segment.…”