Sagy Cohen



  • Post Doctorate, University of Colorado, Boulder, 2012
  • PhD, University of Newcastle, Australia, 2010

Research Areas

  • Geographic information systems
  • Numerical modeling
  • Geomorphology
  • Global hydrology


Sagy Cohen earned his Ph.D. in Environmental Sciences at the University of Newcastle, Australia. He held a two-years post-doctoral appointment at the Community Surface Dynamics Modeling System (CSDMS) group within the Institute of Arctic and Alpine Research (INSTAAR) at the University of Colorado. He joined the faculty of the Department of Geography at the University of Alabama in 2012, establishing the Surface Dynamics Modeling Lab (SDML) shortly after.
Dr. Cohen’s primary scientific interest is modeling and analysis of hydro-geomorphic processes and dynamics in large global rivers. He is also leading research and development efforts focusing on flood remote sensing, analysis and modeling.
Research Group: Surface Dynamics Modeling Lab


Selected Publications

Moragoda, N., S. Cohen, (2020). Climate-induced Trends in Global Riverine Water Discharge and Suspended Sediment Dynamics in the 21st Century. Global and Planetary Change, 191, 103199.

Cohen, S., A. Raney, D. Munasinghe, J.D. Loftis J, A. Molthan, J. Bell, L. Rogers, J. Galantowicz, G.R. Brakenridge7, A.J. Kettner, Y. Huang, Y. Tsang, (2019). The Floodwater Depth Estimation Tool (FwDET v2.0) for Improved Remote Sensing Analysis of Coastal Flooding. Nat. Hazards Earth Syst. Sci., 19, 2053–2065.

Dunn, F. E., S. E. Darby, R. J. Nicholls, S. Cohen, C. Zarfl, B.M. Fekete, (2019). Projections of Declining Fluvial Sediment Delivery to Major Deltas Worldwide in Response to Climate Change and Anthropogenic Stress. Environmental Research Letters, 14 (8), 084034.

Syvitski, J.P., S. Cohen, A. Miara, J. Best, (2019). River Temperature and the Thermal-Dynamic Transport of Sediment. Global and Planetary Change, 178,168-183.

Cohen, S., T. Wan, M.T. Islam, J.P.M. Syvitski, (2018), Global River Slope: A New Geospatial Dataset and Global-scale Analysis. Journal of Hydrology, 568, 1057-1067.

Cohen, S., G. R. Brakenridge, A. Kettner, B. Bates, J. Nelson, R. McDonald, Y. Huang, D. Munasinghe, and J. Zhang (2018), Estimating Floodwater Depths from Remote Sensing Flood Inundation Maps and Topography, Journal of American Water Resources Association (JAWRA), 54 (4), 847–858.

Cohen, S., T. Svoray, S. Sela, G. R. Hancock, G., G. R. Willgoose (2017), Soilscape Evolution of Aeolian-dominated Hillslopes During the Holocene: Investigation of Sediment Transport Mechanisms and Climatic-Anthropogenic Drivers, Earth Surface Dynamics, 5, 101-112.

Cohen, S., A. J. Kettner, J.P.M. Syvitski (2014), Global Suspended Sediment and Water Discharge Dynamics Between 1960 and 2010: Continental Trends and Intra-basin Sensitivity, Global and Planetary Change, 115, 44-58.

Cohen, S., A. J. Kettner, J.P.M. Syvitski B.M. Fekete (2013), WBMsed, a Distributed Global-scale Riverine Sediment Flux Model: Model Description and Validation, Computers & Geosciences, 53, 80-93.

Brakenridge, G.R., S. Cohen, A.J. Kettner, J.P.M. Syvitski (2012), Calibration of Remote Sensing River Water Discharge with a Global Water Discharge Model, Journal of Hydrology, 475, 123-136.

More publications on the Surface Dynamics Modeling Lab website