California Levee Risk, Now and in the Future: Identifying Research and Tool Development Needs [open pdf - 1MB]
"The Center for Catastrophic Risk Management (CCRM) and the California Center for Environmental Law & Policy (CCELP) at UC Berkeley and the Lawrence Livermore National Laboratory (LLNL) joined together to cosponsor a workshop to define research requirements to mitigate the hazards facing the Sacramento-San Joaquin Delta Levee system. The Workshop was intended to provide a forum to 1) Report assessments of current vulnerabilities facing the levees, such as structural failure, seismic loading, flooding, terrorism; 2) Consider longer term challenges such as climate change, sea level rise; and 3) Define research requirements to fill gaps in knowledge and reduce uncertainties in hazard assessments. […] The Sacramento-San Joaquin Delta Levee system has received considerable attention since the Jones Tract levee failure in June 2004, the Hurricane Katrina disaster in New Orleans and the centenary of the 1906 San Francisco earthquake. The fragility of the levees in the Sacramento-San Joaquin Delta, and the threat of a tremor on the faults running nearby, have long been a concern for water managers in California. The Delta region faces societal and economic pressures related to land-use issues for agriculture, water resources, navigation and urbanization. Addressing levee issues requires dealing with uncertainty regarding how risks will evolve in the coming decades due to expected changes: natural ones such as climate change, then social ones such as population growth and urbanization. It is timely to assess the current status of Delta Levee hazards and define the research requirements to reduce uncertainties to move toward mitigation of these hazards. The Katrina disaster has demonstrated the importance of the levee systems. Substantial resources will be mobilized in the coming years to address aspects of the problem."
University of California Radiation Laboratory, UCRL-TR-226504
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