Conceptual Model for Assessing Recreational Safety                        Related to Habitat Improvement Projects         ...
Approach         Recreational user safety is a function of;         — Reach characteristics         — Structure characteri...
Reach FactorsDefine therecreational use— Frequency of use— Access to project  reach— Recreational  flow rangeWE FIND A BET...
Reach Factors          Define the recreational use (continued)          — Ability of users                       1        ...
Reach Factors          Define the geomorphic indices          — Channel type                   1          2           3WE ...
Reach Factors          Define the geomorphic indices (continued)          — Channel gradient          — Channel stability ...
Reach Factors    Define the geomorphic indices (continued)    — Frequency of natural large wood*                          ...
Structure Factors    What is location of the structure?    — Outside of a channel bend?    — Within wetted area during rec...
Structure Factors What are the structure characteristics? — St i    Strainer    potential — Structure type**.Abbe, T.B. an...
Structure FactorsWhat is the avoidancepotential?— Sight Distance— Can the structure be  portaged?— Wading safety factor  (...
Assessment ModelWE FIND A BETTER WAY
Project Example                       Cavanaugh Island                       Restoration South Fork                       ...
Project Example (continued)          j        p (           )WE FIND A BETTER WAY
Project Example (continued)                                         ELJ 4 – APEX                                         J...
So Now What…    Risk can be mitigated through    — Public education/outreach    — Public notification    — Signage    — Mo...
Questions / DiscussionWE FIND A BETTER WAY
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Conceptual Model for Assessing Recreational Safety Related to Habitat Improvement Projects

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As given during the 2011 Salmon Recovery Conference

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Conceptual Model for Assessing Recreational Safety Related to Habitat Improvement Projects

  1. 1. Conceptual Model for Assessing Recreational Safety Related to Habitat Improvement Projects R. Leif Embertson, MS, PE Salmon Recovery Funding Board – Salmon Habitat Conference April 27, 2011WE FIND A BETTER WAY
  2. 2. Approach Recreational user safety is a function of; — Reach characteristics — Structure characteristicsWE FIND A BETTER WAY
  3. 3. Reach FactorsDefine therecreational use— Frequency of use— Access to project reach— Recreational flow rangeWE FIND A BETTER WAY
  4. 4. Reach Factors Define the recreational use (continued) — Ability of users 1 2 3WE FIND A BETTER WAY
  5. 5. Reach Factors Define the geomorphic indices — Channel type 1 2 3WE FIND A BETTER WAY
  6. 6. Reach Factors Define the geomorphic indices (continued) — Channel gradient — Channel stability 1 2WE FIND A BETTER WAY
  7. 7. Reach Factors Define the geomorphic indices (continued) — Frequency of natural large wood* wood • Low (<25th percentile(%)) • Moderate (>25th and <75th %) • High (>75th %)*.Fox, M., S. Bolton, 2007. A Regional and GeomorphicReference for Quantities and Volumes of InstreamWood in Unmanaged Forested Basins of WashingtonState. North American Journal of FisheriesManagement 24:342-359, March 1, 2007.WE FIND A BETTER WAY
  8. 8. Structure Factors What is location of the structure? — Outside of a channel bend? — Within wetted area during recreational flow? SOUTH FORK NOOKSACK SOUTH FORK NOOKSACK SKOOKUM REACH FOBES REACHWE FIND A BETTER WAY
  9. 9. Structure Factors What are the structure characteristics? — St i Strainer potential — Structure type**.Abbe, T.B. and D.R.Montgomery. 2003.Patterns and Processes of WoodAccumulation in the Queets River Basin,Washington. Geomorphology 51:81-107.WE FIND A BETTER WAY
  10. 10. Structure FactorsWhat is the avoidancepotential?— Sight Distance— Can the structure be portaged?— Wading safety factor (WSF)*WSF = Velocity*Depth*.Abt, S.R., Wittler, R.J., Taylor, A., and D.J. Love,1989.1989 Human stability in a high flood hazard zone zone.American Water Resources Association, WaterResources Bulletin, 25(4) 881-889, August 1989.WE FIND A BETTER WAY
  11. 11. Assessment ModelWE FIND A BETTER WAY
  12. 12. Project Example Cavanaugh Island Restoration South Fork Nooksack River Objectives 1. Increase duration and amount of flow within side channel 2. Increase pool habitat 3. Promote forested island stabilityWE FIND A BETTER WAY
  13. 13. Project Example (continued) j p ( )WE FIND A BETTER WAY
  14. 14. Project Example (continued) ELJ 4 – APEX JAM RESULT MODERATE SAFETY RATINGWE FIND A BETTER WAY
  15. 15. So Now What… Risk can be mitigated through — Public education/outreach — Public notification — Signage — Monitoring — Adapti e management AdaptiveWE FIND A BETTER WAY
  16. 16. Questions / DiscussionWE FIND A BETTER WAY

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