Fig. 4: Interplay of local factors (valley floor width, active channel width and confinement ratio) on geomorphic river mobility for four segments with a mid-segment topographic constriction.
From: Big data show idiosyncratic patterns and rates of geomorphic river mobility
a Geomorphic river mobility expressed as the per-pixel locational probability through the sequence of constriction to expansion; flow direction is from bottom to top. Grey areas show the mapped valley floor. Numbers denote the longitudinal distances before and after the inflection of the constriction/expansion. Coordinate locations at zero longitudinal distances: Abra (17°30'8“N 120°42'59“E), Cagayan (16°32'52“N 121°41'21“E), Abulug (18°9'45“N 121°21'38“E) and Chico (17°39'24“N 121°25'22“E). b Local factors in the context of valley setting that contribute to the nature of lateral channel mobility. Longitudinal distances and valley floor widths are re-scaled by dividing by the valley floor width at the inflection (denotated by dashed line). Active channel widths are re-scaled by dividing by the active channel width at the inflection. Locational probabilities use the same colour scale in (a) and (b). The base maps are (a) extracts of the mapped valley floors from the digital elevation model (see Methods section).
