San Joaquin River Geomorphic Levee Evaluation

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As part of the California Department of Water Resources (DWR) FloodSAFE Program, DWR needed to evaluate more than 150 miles of levees along the San Joaquin River and its tributaries for stability.

ESA prepared a geomorphic conditions assessment identifying potential sources of instability for levees on the San Joaquin River and tributaries from the Merced River confluence to the Delta. The assessment gave particular attention to the potential for levee underseepage due to poor foundation materials within the underlying soils. Our assessment provided information on the characteristics of shallow subsurface deposits that comprise levee foundation material, as well as the context of the San Joaquin's geomorphic evolution and how it relates to future levee stability in the region. This information guides current geotechnical evaluations and the formulation of system-wide flood management and habitat restoration planning alternatives.

ESA assessed potential sources of instability along 150-miles of San Joaquin River levees. The findings identified characteristics of shallow subsurface deposits that comprise levee foundation material, as well as the context of the San Joaquin River's geomorphic evolution and how it relates to future levee stability in the region.

Specialized Services

  • Floodplain mapping
  • Hydrologic and hydraulic modeling