Physical Sciences and Mathematics Commons^™

Changes In Grain-Size Distribution In A Gravel-Bed Stream Due To A Point-Source Influx Of Fine Sediment, John A. (John Andrew) Maloy

WWU Graduate School Collection

The bedload of a gravel-bed stream was sampled from two reaches, one upstream and one downstream of a large (1.0x10⁶ m³ of material removed) landslide, in order to assess the change in particle-size distribution caused by the influx of the finer-grained landslide material. For sampling purposes, the bedload was initially stratified on the basis of apparent grain size variability into 11 strata, or channel map units. Surface and subsurface materials were sampled independently. Subsurface sample sites were selected using stratified random sampling, with 30 sites upstream and 36 downstream of the landslide. Sampling techniques were modified from Church …