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CASE STUDY LIFELINE RESILIENCE RESILIENCE LOS RESILIENCE

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CASE STUDY  LIFELINE RESILIENCE RESILIENCE LOS RESILIENCE Powered By Docstoc
					 CASE STUDY:
   LIFELINE
RESILIENCE-
RESILIENCE- LOS
   ANGELES
DEPARTMENT OF
WATER & POWER
        O Rourke
   Tom O’Rourke
 Cornell University


         LADWP SHORT COURSE & WORKSHOP
                               1200 km2
                 Los
               Angeles



N
                                         40 km
    200 km



         LADWP SHORT COURSE & WORKSHOP
Los Angeles Department of
Water and Power (LADWP)
                 • Serves 4.0
                   Million People
                 • 12,000 km
                   Distribution &
                   Trunk Pipelines
                 • 1200 km2

    LADWP SHORT COURSE & WORKSHOP
DECISION SUPPORT SYSTEM
                i   l
             • Simulates 12,000 km k
               pipelines & facilities
             • Comprehensive seismic
               & geohazards
             • Special software for
               damaged hydraulic
               network analysis
             • System risk & reliability
             • Water & electric
               interaction
             • Economic/social impacts

    LADWP SHORT COURSE & WORKSHOP
GIRAFFE SIMULATION



                 • EPANET Hydraulic Engine
                  Trunk & Di t ib ti
                 •T                  Li   D
                      k Distribution Line Damage
                 • Pipe Break & Leak
                 • Negative Pressure Elimination
                 • Deterministic & Monte Carlo
                 Simulations
                 •Outputs Linked to GIS Directly


   LADWP SHORT COURSE & WORKSHOP
   LA Active Faults          Los Angeles
                             Earthquake
                             Ea thq ake
                             Sources

                              gg g
                             Aggregated
                             Regional
                             Hazard
> 25 Different
   Sources                   Represented
                             by 59 Scenario
                             Earthquakes

        LADWP SHORT COURSE & WORKSHOP
MULTI-
MULTI-MODAL SIMULATION
                    Simulation for Ground
                     Failure, Accidents,
                       Human Threats

                   Probabilistic Simulation
                      System-
                  for System-wide Seismic
                        Wave Effects


                  Combined Simulation for
                     Permanent Ground
                   Deformation & Seismic
                        Wave Effects


    LADWP SHORT COURSE & WORKSHOP
    VALIDATION: 1994
 NORTHRIDGE EARTHQUAKE
• System Serviceability
  • Results agree with LADWP records

• Geographic Distribution of Lost
  Water Service
  • ~90% match with actual records

  Flow at Key Locations
• Fl    tK L      ti
               g
  • Excellent agreement with records

        LADWP SHORT COURSE & WORKSHOP
                       Mw 6.5 Northridge Scenario EQ
                        2002 System with Hollywood
                      Reservoirs, Distribution & Trunk
                      Line PGD-induced Damage, & EP
                            Loss, Winter Demand
                     City Trunk Line Leak = 23,000 gpm
                        y                     ,    gp
                            Pipe Flow at 24 hrs
                        0 hr SSI: 97.2% (median)
                        24 hr SSI: 74.6% (median)
                                 LEGEND
                             Pipe Flow
                                   = Damaged
N                                    = Flow
                                  = No Flow After
                                  = No Flow Before
                                   = Removed
                           Water Outage
                                    = 1 Day
                                  = 2-7 Days




    LADWP SHORT COURSE & WORKSHOP
Permanent Ground Transient Ground       Permanent &
   Deformation      Deformation       Transient Ground
      Only             Only              Deformation

            LADWP SHORT COURSE & WORKSHOP
GREAT SOUTHERN
  CALIFORNIA
   SHAKEOUT
• Maximum PGVs
close to 200 cm/s in
Los Angeles
L A       l
• Use correlations
between PGV and RR
to model damage in
trunk line and
distribution system


          LADWP SHORT COURSE & WORKSHOP
PGD & LOCAL
  DAMAGE
• Los Angeles
Aqueducts ruptured
by 3.3 m of fault
movement
• Identify areas with
liquefiable soil and
model the additional
damage to pipelines


          LADWP SHORT COURSE & WORKSHOP
DECISION CHART FOR PGD DAMAGE




      LADWP SHORT COURSE & WORKSHOP
  SYSTEM SERVICEABILITY INDEX
SSI is the ratio of water available at all system nodes
    after the EQ to water available before the EQ




           LADWP SHORT COURSE & WORKSHOP
        FLOW CONDITIONS




0 Hrs

                           24 Hrs



        LADWP SHORT COURSE & WORKSHOP
WATER SERVICE AREAS
                 Results for 15 Service Areas
                 R   lt f       S   i A




 LADWP SHORT COURSE & WORKSHOP
               LA Reservoir
              13 6
              13.6 M m3
14.8 M m3                  y
                       Hollywood
Encino                 Reservoir
Reservoir              5.4 M m3
            Stone
            Canyon 13.6 M m3
            Reservoir



        Disinfectant
        By-
        By-Products

   LADWP SHORT COURSE & WORKSHOP
 EMERGENCY USE OF RESERVOIRS
   SI for most
populated areas
 of Los Angeles
   (Westside,
           City
  Central City,
 Highland Park,
   and Mount
  Washington)
  performance
with reservoirs
   on and off

         LADWP SHORT COURSE & WORKSHOP
NEAR REAL-TIME
     REAL-            USGS SHAKEMAPS
 SIMULATIONS

• Strong Motion
      y
 Arrays

  Real-
• Real-Time
 Strong Motion
 Maps

 Input to
•I    tt
 LADWP System
 Simulation for
 Real Time                          ShakeMap for 29 July 08
 Performance                     5.4 MW Diamond Bar, CA EQ
 Assessment

             LADWP SHORT COURSE & WORKSHOP
HIGHLY DUCTILE PIPELINES




     HDPE


    LADWP SHORT COURSE & WORKSHOP
LADWP SHORT COURSE & WORKSHOP
LADWP SHORT COURSE & WORKSHOP
CHRISTCHURCH LIQUEFACTION
  Burwood


                                     Bexley




     LADWP SHORT COURSE & WORKSHOP
          CHRISTCHURCH
         LIQUEFACTION AT
             BEXLEY




LADWP SHORT COURSE & WORKSHOP
BURWOOD (HORSESHOE LAKE)
                            Severe Liquefaction

                           Moderate Liquefaction
                           M d   t Li    f ti

                        • Replaced Damaged
                                d      Piping
                          AC and PVC Pi i
                          After Darfield EQ
                          with HDPE
                          Pipelines
                          No        Pipelines
                        • N HDPE Pi li
                          Damaged After
                          Darfield EQ

     LADWP SHORT COURSE & WORKSHOP
SAN ANDREAS FAULT RUPTURE EFFECTS
   ON LOS ANGELES WATER SUPPLY
            California
            Aqueducts
                                  g
                            Los Angeles
                             Aqueducts

                           Elizabeth Tunnel   Colorado R.
                                               Aqueduct
                                               A    d


             Los Angeles




       LADWP SHORT COURSE & WORKSHOP
LA AQUEDUCT ELIZABETH LAKE TUNNEL:
    HDPE PIPELINE INSTALLATION




                                  • HDPE Pipe to
                                    allow water
                                    flow after fault
                                       p
                                    rupture

       LADWP SHORT COURSE & WORKSHOP
    LIFELINE RESILIENCE: LOS
     ANGELES WATER SUPPLY
  State-of-the-
• State-of-the-Art Decision Support
  System
• Emergency Response and Planning
  Strategy for Major Earthquakes
  St t     f M j E th        k
• Real Time Earthquake Simulation of
  Emergency Response for Post EQ
   p
  Operations
• Highly Ductile HDPE to Mitigate Fault
  Rupture Effects
        LADWP SHORT COURSE & WORKSHOP

				
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