1 / 20

2005 Preliminary Summer Spill Data

2005 Preliminary Summer Spill Data. Fall Chinook Radiotelemetry Studies Performed by USGS – BRD, NOAA – NWFSC For the USACE Anadromous Fish Evaluation Program. Important Considerations. These estimates do not address transport vs. in-river survival nor adult return issues

huyen
Télécharger la présentation

2005 Preliminary Summer Spill Data

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. 2005 Preliminary Summer Spill Data Fall Chinook Radiotelemetry Studies Performed by USGS – BRD, NOAA – NWFSC For the USACE Anadromous Fish Evaluation Program

  2. Important Considerations • These estimates do not address transport vs. in-river survival nor adult return issues • This information is very preliminary and the specific numbers are likely to change • This is the first look at subyearling passage at most of these projects including RSW’s • These survival estimates are relative survival estimates compared to a tailrace reference (except at Little Goose)

  3. Legend Survival Metrics Passage Metrics % of fish passing a dam via a specific route % of fish surviving a dam or specific dam passage route Passage Route % of fish surviving RSW passage route % of Fish Passing a dam via an RSW

  4. Lower GraniteBackground Information • Study • Radio Telemetry – Paired Release (2200 fish released) • June 20 – July 22 • Operations • RSW on Total Avg Q = 41kcfs • RSW on Spill Avg Q = 18.5kcfs (46.7%) • RSW off Total Q = 43.4kcfs • RSW off Spill Avg Q = 30.5kcfs (69.6%)

  5. Lower Granite Dam Spill Passage 94% Turbine Passage 2% Bypass Passage 4% Dam Survival 89.5% Bypass not included Summer Non-RSW Operations Spill Survival 90.2%

  6. Lower Granite Dam Spill Passage 86.5% Training 18.5% Turbine Passage 2.5% RSW 68% RSW Survival 94.5% Bypass Passage 11% Dam Survival 93.9% Bypass not included Summer RSW Operations

  7. Little GooseBackground Information • Study • Radio Telemetry – Single Release • Used the ~2000 fish released at LGR • June 21 – July 28 • Operations • Total Avg Q = 39.6kcfs • Spill Avg Q = 17.9kcfs (44%)* • Spill changed during the study due to adult passage issues • Spill limited to 30% daytime

  8. Little Goose Dam Spill Passage 84% Turbine Passage 3% Bypass Passage 13% Dam Survival 91.6% Bypass not included Summer Non-RSW Operations Spill Survival 92%

  9. Lower MonumentalBackground Information • Study • Radio Telemetry and PIT – Paired Release • Approximately 2200 fish released • *July 6 – July 16 • Operations • Total Avg Q = 36kcfs • Spill Avg Q = 21kcfs (59%)

  10. Spillway Passage 88% Turbine Passage 2% Bypass Passage 8% Dam + Forebay Survival 72.2% Dam Survival 86.2% Lower Monumental Dam * Summer Non-RSW Operations Spill Survival 90.5%

  11. Ice HarborBackground Information • Study • Radio Telemetry and PIT – Paired Release • Approximately 4200 fish released • June 10 – July 1 • Operations • RSW on Total Avg Q = 50kcfs • RSW on Spill Avg Q = 23kcfs (46%) • RSW off Total Avg Q = 49kcfs • RSW off Spill Avg Q = 41kcfs (84%)

  12. Ice Harbor Dam Spillway Passage 98% Turbine Passage 1% Bypass Passage 1% Dam + Forebay Survival 95.1% Dam Survival 99.6% Summer Non-RSW Operations Spill Survival 99.8%

  13. Ice Harbor Dam Spill Passage 87% Turbine Passage 5% Bypass Passage 8% Training 27% RSW 60% Dam + Forebay Survival 92.9% Training Survival 95.9% RSW Survival 99.4% Spill Survival 98.3% Dam Survival 98.0% Summer RSW Operations

  14. McNaryBackground Information • Study • Radio Telemetry - Paired Release • Approximately 2700 fish released • June 22 – July 31 • Operations • Total Avg Q = 171kcfs • Spill Avg Q = 104kcfs (60%)

  15. McNary Dam Spill Passage 64% Spill Survival 102% Turbine Passage 19% Turbine Survival 86% Bypass Survival 86% Bypass Passage 17% Summer RSW Operations Dam Survival 96.3%

  16. Key Overall Takeaways from R/T Studies • The results suggest generally high subyearling survival through the projects • Fish Passage Efficiency (FPE, the percent of fish passing via non-turbine routes) at all projects was relatively high ranging from 81 to 100%.

  17. Key takeaways (cont.) • Spill Effectiveness (percent of fish passing through the spillway divided by the percent of water passing through the spillway) was higher than we anticipated for Snake River Projects and was 2-3 times higher for RSW’s than spillways. • Dam passage with RSW had higher survival at LGR and Lower at Ice Harbor yet neither were likely statistically significant.

  18. Passage Metrics

  19. Passage Metrics

  20. Relative SurvivalEstimates

More Related