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Andy Tranmer, Ph.D.

Andy Tranmer, Ph.D.

Research Assistant Professor


Center for Ecohydraulics Research



Mailing Address

Center for Ecohydraulics Research
Department of Civil & Environmental Engineering
University of Idaho
322 E. Front Street, Suite 340
Boise, Idaho, 83702

  • Ph.D., University of Idaho, 2013
  • M.E., University of Idaho, 2008
  • B.S., University of California, Davis, 2004

  • Hydrology
  • Water resources
  • Numerical and physical modeling
  • Fluvial geomorphology
  • Sediment transport
  • Channel evolution
  • River restoration

Andy Tranmer’s research addresses the physical processes of complex aquatic systems and their respective influence on ecological resilience for the purposes of responsible alluvial design and river restoration. A greater understanding of the physical mechanics occurring in the riparian corridor allow for prediction of geomorphic evolution, habitat suitability and ecosystem performance to guide sustainable resource management and public policy. A complementary suite of field, numerical and laboratory studies are employed to further the current state of knowledge in these dynamic environments. Recent work in Idaho assessed reservoir operations to guide floodplain sustainability and endangered species recovery. International projects examined pristine fluvial networks in Chilean Patagonia and large-scale flume experiments in Korea to quantify transport mechanics during alluvial channel evolution.

  • Tranmer, A.W., Goodwin, P., Tonina, D., Benjankar, R., Tiedemann, M., 2016. Deadwood reservoir operations flexibility evaluation, Boise Project, Idaho. U.S. Bureau of Reclamation. 685 p.
  • Tranmer, A.W., Goodwin, P., Tonina, D., Benjankar, R., Tiedemann, M. 2015. Floodplain sustainability and dynamic-equilibrium conditions in a canyon environment. Geomorphology 250, 147-158.
  • Tranmer, A.W., Tonina, D., Goodwin, P., Benjankar, R., Tiedemann M., Woods, P., 2014. A cascade of models to guide reservoir operations: application on the Deadwood River system.  Proceedings from the 11th International Conference on Hydroinformatics HIC 2014, New York, USA. 8 p.
  • Tranmer, A.W., Caamaño, D.,  Goodwin, P., 2014. The use of extremal hypotheses in predicting channel evolution at Red River Idaho, USA. Proceedings from the XXV Latin American Hydraulics Congress, IAHR, Santiago, Chile. 9 p.
  • Tranmer, A.W., Tonina, D., Goodwin, P., Benjankar, R., Tiedemann M., 2013. Stream power changes in an alluvial Canyon. Proceedings of the 35th IAHR World Congress, IAHR, Chengdu, China. 11 p.
  • Benjankar, R., Tonina, D., Tranmer, A.W., Tiedemann, M.G., Goodwin, P., 2013. Impacts of dam regulated discharge scenarios on the thermal regime of the Lower Deadwood River in Central Idaho, USA. Proceedings of the 35th IAHR World Congress, IAHR, Chengdu, China. 9 p.
  • Maret, T.R., Konrad, C.P., Tranmer, A.W., 2010. Influence of environmental factors on biotic responses to nutrient enrichment in agricultural streams. J. American Water Resources Association, 46, 3, 498-513.
  • Tranmer, A.W., Goodwin, P., 2009. Can general circulation models detect climate change signatures in catchment scale hydrology of the Intermountain West, USA?. IAHR Proceedings from the 7th Annual Ecohydraulics Conference, Concepcion, Chile. 10 p.

  • Geomorphic evolution of deglaciating catchments
  • Integrated reservoir-river interactions
  • Effects of vegetation and sediment transport on river channel evolution
  • Geomorphic sustainability of floodplains in the landscape

Center for Ecohydraulics (CER)

Center for Ecohydraulics Research

Mailing Address:

322 E. Front St., Suite 340
Boise, ID 83702

Phone: 208-364-6164