US Army Corps of Engineers Resilience as a component of Resilience - Integration Sustainability - Knowledge Boni Bigornia, PE

Transcription

1 US Army Corps of Engineers Resilience as a component of Resilience - Integration Sustainability - Knowledge Boni Bigornia, PE South Pacific Division Levee Safety Program Manager Engineering & Construction 9 September 2015

2 Pre-Katrina Process 1. Plan, Design, and Build a Project then Inspect and Perform Maintenance 2. We previously assumed 4 plan formulation criteria are met: 1. Effectiveness 2. Efficiency 3. Acceptability 4. Completeness Residual Risks?

3 Interagency Performance Evaluation Task Force American Society of Civil Engineers National Research Council Hurricane Protection Decision Chronology

4 Post-Katrina Actions For Change Tools Guidance Protocols/ Programs Policy Behavior 2 Risk-based concepts 3 Reassess & update process & Policy Procedures 1 Systems-based approach 6 Sustainability 12 Research 4 Dynamic Independent Review 5 Adaptive Management (RESILIENCE) 7 Improve ICW Program (Levees) 9 Effectively Communicate Risk 6 Sustainability (SUSTAINABILITY) 8 Organizational Behavior 9 Effectively communicate risk 10 Public Strategy Involvement 11 Enhance Technical Expertise 12 Research (KNOWLEDGE) (INTEGRATION)

5 Systems Risk ICW (Inspection of Completed Works) Program = New USACE Levee Safety Program Communication Levee Screening Tool (LST) 1. Embankment seepage and piping 2. Embankment stability 3. Embankment erosion 4. Closures 5. Floodwall seepage and piping 6. Floodwall stability

6 Contribution to Likelihood of Breach Prior to Overtopping Performance Type Performance Index Life Safety Index Economic Index Embankment and Foundation Seepage and Piping Embankment Stability Embankment Erosion 2.97% 3.49% 2.97% 0.87% 1.02% 0.87% 6.15% 7.22% 6.15% Closure Systems 27.68% 15.12% 27.68% Floodwall Stability 60.48% 70.99% 60.48% Floodwall Underseepage and Piping 1.84% 2.16% 1.84%

7 Screening-Level Depth Grid Overtopping location Levee Sand bag road RR underpass Egress Route

8 Recommendations Non-federal Sponsor should develop and implement an Interim Risk Reduction Measures Plan (IRRMP) in order to analyze floodwall performance and prepare mitigation plans to reduce this risk. Non-federal Sponsor should prepare an Emergency Action Plan (EAP) to include the following: 1) Communication plans to inform the community of potential performance of I- wall. 2) An operating plan to erect the sand bag closure and coordinate with Department of Transportation for road closure procedures. USACE should assist with locating the site of the closure structure. 3) Evacuation routes Non-Federal Sponsor should improve flood warning effectiveness by obtaining a reverse-911 notification system and/or establishing a flood-specific warning siren signal and performing regular tests of these systems. Non-federal Sponsor should re-inspect culverts with appropriate video equipment and submit to USACE for review. Sponsor should replace or slip-line any culvert assessed as unacceptable.

9 Post-Super Storm Sandy Risk Analyses gets further refined with Resilience Analyses Resilience depends on specific qualities not adequately quantified by risk analysis : 1. Ability to adapt 2. System interconnectivity 3. Management of Surprise so we can t rely alone on risk analysis to inform us on resilience more than just infrastructure it is important to consider the non-engineered systems: a. Economic support $; creating, leveraging, and educating on agency programs b. Social communication, understanding media c. Cultural lessons learned from flood fighting, acknowledging climate change Adaptive Management recognizes that systems are complex

10 North Atlantic Coast Comprehensive Study (NACCS)

11 Concepts of Resilience Adapt Prepare Recover Absorb

12 Resiliency Examples Tools Projects Programs Prepare Template Emergency Action Plans FPMS/PAS Studies New Protocol for Communication of Risk - LST recommendations Absorb High Performance Turf Reinforcement Mat (HPTRM) San Lorenzo Right Bank Levee (controlled flow turf soil over grouted stone spillway) PL eligibility = f( OM&I, EPP, communication, USACE activities) Recover Corps Water Management System (CWMS) Riverside Levees Rehab (stronger than-original X-Section PL rehab considers environment & robustness Adapt Climate Preparedness & SLR Calculator South SF Bay - Resilient Levee Prism to allow for increased levee heights SWIFs, WC Deviations, Public- Private Partnerships