出典:Wikipedia
出典:『Wikipedia』 (2011/05/07 07:56 UTC 版)
A knickpoint is a term in geomorphology to describe a location in a river or channel where there is a sharp change in channel slope, such as a waterfall or lake, resulting from differential rates of erosion above and below the knickpoint. Differential rates of erosion can result from a change in the lithology of the river channel. Sharp changes in channel slope caused by faulting or in-channel construction are not considered knickpoints.