Clastic sediment movement was evaluated in Roaring River Watershed in the Mummy Range of the Colorado Front Range. Photogeologic techniques and fieldwork on identifiable landforms were used to develop a terrain classification of sediment transfer. Terrain units formed the bases for assessing contemporary processes of sediment transport and for testing its usefulness in evaluating sediment flux. Contemporary behavior of terrain units suggests relative stability (short-term, i.e., 50 years) of the present system. The hillslope sediment transfer system appears to act as a closed system and is dominated by internal transfer of sediment moving on slopes with little clastic material entering the fluvial system. The method proposed here can be used by mountain park and wilderness area managers as a framework for determining alpine and subalpine ecosystem disturbance that results from recreational impact.
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