San Juan River Live Gravel-Bar Staking

Follows live gravel-bar staking on the San Juan River from 1998 to 2014, showing plant growth, sediment collection behind woody debris, bar development and conifer establishment.

3:10 · 16 slides · Historical presentation · No recorded narration

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Live Gravel Bar Staking: San Juan River, BC · Live Gravel Bar Staking

About this presentation

Source: Segment Live Gravel Bar Staking San Juan. Slides by David Polster; individual image and diagram credits remain in the presentation. This video includes the complete supplied deck. It is an archive slideshow, not a recording of the spoken conference session.

Dates, costs and examples reflect the original presentation. Treatment suitability depends on current site conditions and requirements.

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  1. Installing cuttings on San Juan River bar March 12, 1998

  2. Live Gravel Bar Staking

  3. Cuttings growing
    May 19, 1998

  4. Sprouts collect small woody debris
    March 12, 1999

  5. Sediment collects in slack water behind small woody debris jams
    March 12, 1999

  6. Once twigs too small to collect debris, sediment collection stops, 80 cm of sediment collected during the first year.
    March 12, 1999
    80 cm of sediment collected over the 10 ha of gravel bars staked the first year (80,000 m3)

  7. This leaves enough sticking out so that the cuttings can grow again the following summer, June 29, 1999

  8. New plants and large woody debris, October 31, 2002

  9. Continued successional development
    June 2, 2006

  10. Understory starting to diversify
    June 2, 2006

  11. As the gravel bar builds, the thalwag deepens, June 2, 2006

  12. June 19, 2011

  13. A dense stand of willows and other species have developed on the bar.
    June 19, 2011

  14. The root infused sand is relatively erosion resistant (June 19, 2011)

  15. June 10, 2014

  16. June 10, 2014
    Sitka Spruce establishing under the canopy of pioneering species

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