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Smith Sess7 102109
- 1. Levee Vegetation The Good, The Bad and The Ugly 2009 - SAME California Water Conference October 28, 2009
- 2. Our Riparian Corridor is Under Attack!
- 3. From the Sacramento Bee “ Army Corps Orders Thousands of Trees Chopped Down”
- 4. From the Sacramento Bee “ Army Corps Levee Tree Rules Rattle Sacramento Flood Agencies”
- 5. From USA Today “ Army Corps Cracks Down on Flunking Levees ”
- 6. Sacramento Bee “ Pact Gives a Reprieve to Valley’s Levee Trees ”
- 7. “
- 8. There are some places where we have the prescribed template
- 10. And there are some places where we don’t met the exact template…
- 14. Here in the Central Valley we like our Vegetation Along our Rivers
- 24. ENVIRONMENTAL BENEFITS Many Threatened and Endangered Species Associated with the River and the Riparian Corridor
- 25. ENVIRONMENTAL BENEFITS The environmental needs vary with each River and River Reach and should be an essential part of the design
- 27. VELOCITY REDUCTION DWR Funded Study By UC-Davis Slides Thanks to Stefan Lorenzato
- 30. SLOPE REINFORCMENT The benefits aren’t quite so clear…
- 34. Some Examples of Vegetation on Levees within the Sacramento River Flood Control System
- 48. Strict Adherence to the ETL will leave most of our Levees in the UGLY category.
- 49. Within the Sacramento System Any Recorded Levee Failures from Trees? Modern Day Failures have been Geotechnical in Nature.
- 50. Suggested Changes to the ETL
- 51. 1. Public safety is still job one, but treat the need for the riparian corridor as a necessity.
- 52. 2. Delete the waterside veg-free zone where there is no need for an access road.
- 53. 3. Allow a selected mix of shrubs and willow vegetation on structurally sound levee slopes.
- 54. 4. Allow selected tree species within over-thickened rock armor sections and oversized levees.
- 55. 5. Create one overall maintenance district to insure uniform application of maintenance practices.
- 56. 6. Create our own uniform maintenance standards for vegetation zones and vegetation free zones.
- 57. 7. Perform inspections during high flows with side scan sonar device.
- 58. What can we do in the meantime?
- 61. Environmental Document vegetative needs by summarizing the specific environmental and endangered specie needs for each River and each different reach.