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Thrust 1: Hazard Mitigation

Projects

The suite of projects in the Hazard Mitigation thrust include systems integration projects on biofilms for seepage control beneath dams and levees, Targeted Bioremediation for Foundations, and Liquefaction Mitigation via MICP and enabling technology projects on Root-Inspired Reinforcement and development of Biostimulation Techniques for Biocementation and Biofilm Development. Biofilms for Seepage Control relies upon the preferred seepage pathway to distribute the necessary microbes and nutrients to the target locations to stimulate biofilm growth for seepage reduction; this technology is applicable to seepage control for dams, levees, and excavations.

Bioremediation for foundations will employ MICP to strengthen and stiffen foundation soil vulnerable to settlement, bearing failure, and lateral displacement/rocking. Root-inspired reinforcement will investigate methods for mimicking the behavior of tree roots to stabilize slopes and enhance foundation performance, laying the groundwork to move toward more efficient “pile-root” topologies for deep foundations and soil reinforcement systems.

Biostimulation for biocementation and biofilm development will advance current UCD studies focused on stimulating indigenous bacteria rather than supplying exogenous bacteria for MICP and biofilm development. Using biostimulation instead of bioaugmentation should ease regulatory and public resistance, reduce cost, and increase treatment uniformity. Related projects under the Environmental Protection and Ecological Restoration thrust include bio-inspired chaotic cyclic push-pull injection schemes and electro-kinetic subsurface transport. The use of synthetic polymers to create 2D and 3D frameworks for structuring mineral precipitation (a cross-cutting project) is another related enabling technology applicable to this thrust.

Hazard Mitigation Faculty

  • Lead: J. DeJong, Geotechnical Engineering, UC Davis
  • T. Ginn, Environmental Engineering, UC Davis
  • D. Nelson, Microbiology, UC Davis
  • A. Kendall, Sustainability, UC Davis
  • E. Kavazanjian, Geotechnical Engineering, ASU
  • R. Krajmalnik-Brown, ASU
  • E. Schock, Biogeochemical Engineering, ASU
  • P. Bandini, Geotechnical Engineering, NMSU
  • B. Weldon, Engineering Materials, NMSU
  • J.D. Frost, Geotechnical Engineering, GT