This study examines the rate of recession of Shomyo Falls, which consists of Pleistocene welded pyroclastic flows deposits in Toyama Prefecture. The discrepancy between the geology-based and equation-based recession rates indicates that some factors
, not taken account of in the equation, significantly influence the recession rate. The AA. suggest that a factor in the rapid erosion of the waterfall is a large amount of transported sediment acting as abrasive material, which is supplied from high mountains
This study examines recession rates of waterfalls in welded Aso-1 ignimbrite from the Aso volcano in southwestern Japan using an empirical equation, which comprises a force/resistance index composed of measurable geomorphic parameters. The estimated
rates are then validated by examining the duration and distance of their recession. The contrast between the highly dissected landforms downstream of the present waterfalls and the gentle landscapes upstream of the waterfalls suggeststhat the rapid
recession of the waterfalls is the major cause of post-eruptive fluvial erosion into ignimbrites.
processes that are responsible for the observed changes. The results demonstrated that the Yellow River Delta has recently been dominated by recession process due to the reduced sediment supply from the Yellow River in the recent decades. A critical
rates in the basin while the glacier retreated, and as the lake became free of ice contact in the early 1970s. Although recession has continued over recent decades, and glacier proximity to the lake has, therefore, continued decreasing, lacustrine
old surface vegetation covering peaty material became exposed due to ice recession close to the site where the antler was found. The antler indicates that reindeer lived in the area when the glacier began to advance from a position where it was close