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Assessment of channel morphology, salmonid habitat, and riverine processes in the Lower Snake River

The Pacific Northwest National Laboratory conducted this research to evaluate the effects of operational dam modifications to physical characteristics and riverine processes of the lower Snake River. The studies addressed uncertainties regarding the extent that mainstem habitats and riverine processes required for fall chinook production could be achieved by operational dam modifications. The work included quantifying the physical characteristics and habitats of reference river reaches, quantifying the geomorphic features that describe salmon production areas, and evaluating changes in the flow regime and sediment transport resulting from operational dam modifications.


  • Hanrahan, T. P., D. A. Neitzel, D. R. Geist, and D. D. Dauble. 1999. Assessment of restoring predam channel morphology, salmonid habitats, and riverine processes through drawdown: Lower Snake River. Part 1, Appendix H, Lower Snake River Juvenile Migration Feasibility Study Draft EIS. U. S. Army Corps of Engineers, Walla Walla District.
  • Hanrahan, T. P., D. A. Neitzel, M. C. Richmond, and K. A. Hoover. 1998. Assessment of drawdown from a geomorphic perspective using geographic information systems: Lower Snake River, Washington. Final report submitted to U.S. Army Corps of Engineers, Walla Walla District.


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