![]() ![]() We use a statistical approach that shows a parameter optimisation and a linear regression of SY on SCA extent. The present study investigates the applicability of this concept to the Western Alps to identify geomorphologically active areas and to estimate mean annual sediment yield (SY) in mainly debris‐flow‐prone catchments. The SCA concept is delineated on a digital elevation model (DEM) using a set of rules related to the steepness and length of slopes directly adjacent to the channel network, the gradient of the latter and the vegetation cover. ![]() Studies from the Northern Calcareous Alps show that the size of the sediment contributing area (SCA), a subset of the drainage area that effectively delivers sediment to the channel network, can be used as a predictor of sediment delivery to mountain streams. The supply of sediment from these slopes to mountain streams and the subsequent transport lead to sediment connectivity, that describes the integrated coupling state of these systems. The production of coarse sediment in mountain landscapes results mainly from the type and activity of geomorphic processes and topographic and natural conditions (e.g. ![]()
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