1 / 24

Concept Plan Development Incorporating Flood Mitigation into an Ecosystem Restoration Project

Concept Plan Development Incorporating Flood Mitigation into an Ecosystem Restoration Project. Westside Creeks Restoration Project. 2 nd National Flood Workshop: February 29, 2012. Historical Background - Significance. Historical Background - Flooding. Historical Background - Flooding.

shaine-graham
Download Presentation

Concept Plan Development Incorporating Flood Mitigation into an Ecosystem Restoration Project

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. Concept Plan DevelopmentIncorporating Flood Mitigation intoan Ecosystem Restoration Project Westside Creeks Restoration Project 2nd National Flood Workshop: February 29, 2012

  2. Historical Background - Significance 2nd National Flood Workshop: Westside Creeks Restoration

  3. Historical Background - Flooding 2nd National Flood Workshop: Westside Creeks Restoration

  4. Historical Background - Flooding 2nd National Flood Workshop: Westside Creeks Restoration

  5. Historical Background - Channelization 2nd National Flood Workshop: Westside Creeks Restoration

  6. Historical Background - Channelization 2nd National Flood Workshop: Westside Creeks Restoration

  7. Existing Condition - Discharges • Bankfull Discharge • The formative flow of water that characterizes the morphology (shape) of a fluvial channel • Typically associated with a 1.5-year return period flow 2nd National Flood Workshop: Westside Creeks Restoration

  8. Existing Condition - Floodplain Flood Depth 0 – 1’ 1 – 2’ 2 – 5’ 2nd National Flood Workshop: Westside Creeks Restoration 5 – 10’ 10+’

  9. Existing Condition - Habitat 2nd National Flood Workshop: Westside Creeks Restoration

  10. Existing Condition - Base Flow 2nd National Flood Workshop: Westside Creeks Restoration

  11. Existing Condition - Neighborhoods 2nd National Flood Workshop: Westside Creeks Restoration

  12. Design Process - Catalyst Sites 2nd National Flood Workshop: Westside Creeks Restoration

  13. Design Process - Fluvial Geomorphology >>> Increasing Sediment Supply >>> Moderate Stream Slope Flat Stream Slope Steep Stream Slope 2nd National Flood Workshop: Westside Creeks Restoration

  14. Design Process - Vegetation • Natural Succession takes place over centuries • This goal of this project is to take the Westside Creeks from barren flood channels to a “climax community” in ~50 years 2nd National Flood Workshop: Westside Creeks Restoration

  15. Design Process - Flood Mitigation 2nd National Flood Workshop: Westside Creeks Restoration

  16. Concept Plan - Aerial View 2nd National Flood Workshop: Westside Creeks Restoration

  17. Degrees of Restoration Intensity Type A: This restoration alternative defines locations where the extents of stream modifications are expected to remain essentially within existing ROW limits and publicly owned property. Type B: In locations where additional property may be required to meet flood mitigation needs, the restoration alternative is shown with potential ROW expansion into existing privately owned properties. Flood mitigation is being coordinated with the Master Planning efforts in the San Antonio River basin and the dredging project in Elmendorf Lake. 2nd National Flood Workshop: Westside Creeks Restoration

  18. Project Phasing The first phase recommended for implementation includes 9 stream reaches (4 Type A and 5 Type B) and trails along the entire Westside Creeks, totaling approximately $300M. Of these Phase 1 projects, 4 were selected as initial demonstration projects (Totaling $50M, + $10M for trails on all other stream reaches, in coordination with the Linear Trails Initiative): 2nd National Flood Workshop: Westside Creeks Restoration

  19. Concept Plan - Cross Sections Alazán Reach 1 (Type A) Apache Reach 1 (Type B) Martínez Reach 2 (Type B) San Pedro Reach 2* (Type A) 2nd National Flood Workshop: Westside Creeks Restoration

  20. MA-1 Concept Plan - Phasing MA-2 AL-1 MA-3 AL-2 MA-4 AL-3 MA-5 AP-1 AL-4 SP-1 AL-5 SP-2* AP-2 AL-6 SP-3 AP-4 AL-7 SP-4 AP-3 AP-5 SP-5 SP-6 SP-7 2nd National Flood Workshop: Westside Creeks Restoration

  21. Concept Plan - Cost Estimate 2nd National Flood Workshop: Westside Creeks Restoration

  22. Schedule 2nd National Flood Workshop: Westside Creeks Restoration

  23. Conceptual Plan Documents • Appendix • Historic Resources • Public Meeting Minutes • Existing Conditions • Stable Channel Design • Cost Estimates • Report • Introduction • Plan Context • Community Vision • Existing Conditions • Stream Restoration Approach • Economic Development • Restoration Concept • Implementation • Glossary 2nd National Flood Workshop: Westside Creeks Restoration

  24. For More Information Andrew.Rooke@AECOM.com +1 (512) 457-7884 (office) +1 (210) 381-3390 (mobile) 2nd National Flood Workshop: Westside Creeks Restoration

More Related