Pool Spacing in Forest Channels

  • Montgomery D
  • Buffington J
  • Smith R
 et al. 
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Abstract

Field surveys of stream channels in forested mountain drainage basins in southeast Alaska and Washington reveal that pool spacing depends on large woody debris (LWD) loading and channel type, slope, and width. Mean pool spacing in pool-riffle, plane-bed, and forced pool-riffle channels systematically decreases from greater than 13 channel widths per pool to less than 1 channel width with increasing LWD loading, whereas pool spacing in generally steeper, step-pool channels is independent of LWD loading. Although plane-bed and pool-riffle channels occur at similar low LWD loading, they exhibit typical pool spacings of greater than 9 and 2-4 channel widths, respectively. Forced pool-riffle channels have high LWD loading, typical pool spacing of

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Authors

  • David R. Montgomery

  • John M. Buffington

  • Richard D. Smith

  • Kevin M. Schmidt

  • George Pess

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