Fig. 1: Geomorphic river mobility for a 25 km segment of the Abulug River (Luzon; image centre: 18°18’13.91”N 121°24’30.83”E).
From: Big data show idiosyncratic patterns and rates of geomorphic river mobility
Cloud-free satellite imagery at (a) the start and (b) the end of the analysis period (1988-2019), composited from all available Landsat imagery for two-year time-windows (16 time-windows used for the Abulug River). Geomorphic river mobility expressed as (c) the per-pixel locational probability and (d) the cross-valley locational probability. Locational probability values closer to 1 indicate that the active channel was consistently positioned at that location through time (i.e., more stable; see Methods section). Cross-valley locational probabilities average the per-pixel location probabilities within a swath in the transverse direction along the valley floor centreline at 0.01 km intervals (dashed lines denote 1 km interval). The same cross-valley locational probabilities are displayed longitudinally in (e). Along-valley patterns in geomorphic river mobility are spatially non-uniform; a transition from a less stable (0–15 km) to a more stable channel (15–25 km) is indicated within the example segment. The base maps are (a, b) composite Landsat imagery and (c, d) extracts of the hillshaded digital elevation model (see Methods section).
