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  1. A pebble count procedure for assessing watershed cumulative effects

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    Author(s): Gregory S. Bevenger; Rudy M. King
    Date: 1995
    Source: Res. Pap. RM-RP-319. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 17 p.
    Publication Series: Research Paper (RP)
    Station: Rocky Mountain Forest and Range Experiment Station
    DOI: https://doi.org/10.2737/RM-RP-319
    PDF: View PDF  (1.59 MB)

    Description

    Land mangement activities can result in the delivery of fine sediment to streams. Over time, such delivery can lead to cumulative impacts to the aquactic ecosystem. Because numerous laws require Federal land managers to analyze watershed cumulative effects, field personnel need simple monitoring procedures that can be used directly and consistently. One approach to such monitoring is described. The approach involves sampling a longitudinal reach of stream channel several hundred feet long using a zig-zag pebble count procedure that crosses all habitat features within a stream channel. The approach accomodates reference (unimpacted) and study (impacted) reaches so that impact comparisons can be made. Case studies show how the procedure is applied.

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    Citation

    Bevenger, Gregory S.; King, Rudy M. 1995. A pebble count procedure for assessing watershed cumulative effects. Res. Pap. RM-RP-319. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 17 p.

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    Keywords

    Watershed cumulative effects, monitoring, watershed field techniques, pebble counts, sample sizes

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