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Although a knickzone, a location at which stream gradient is locally large and intense erosion occurs, has been regarded as an important geomorphic feature in bedrock river morphology, the distribution of knickzones has not been well investigated especially for broad area. This study examines the distribution of fluvial knickzones along mountain rivers for the entire Japanese Archipelago. Whereas...
Stream gradients of mountain bedrock rivers in central Japan were examined using GIS and 50-m digital elevation models to discuss the distribution of knickzones. The gradients are classified into local and trend types based on the measurement lengths. The transition rate from the local to trend gradients, i.e. the decreasing rate of gradient with increasing measurement length, is then obtained as...
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