John C Hammond, PhD

John is a Hydrologist with the USGS.  His research focuses on hydroclimatic variability and trends, identifying emprical streamflow relationships across gage networks, and incorporating remotely sensed data into hydrologic models. Current projects include extending NHM-PRMS to Alaska, updating Delaware flood-frequency relationships, and examining low flow variability in the Delaware River Basin.



Hammond, J. C., Harpold, A. A., Weiss, S., and Kampf, S. K.: Partitioning snowmelt and rainfall in the critical zone: effects of climate type and soil properties, Hydrol. Earth Syst. Sci. Discuss.,, in review, 2019.

Hammond, J. C., Saavedra, F. A., & Kampf, S. K. (2018). How does snow persistence relate to annual streamflow in mountain watersheds of the Western U.S. with wet maritime and dry continental climates? Water Resources Research, 54.

Hammond, J. C., Saavedra, F. A., & Kampf, S. K. (2018). Global snow zone maps and trends in snow persistence 2001-2016. International Journal of Climatology.

Kampf, S., Strobl, B., Hammond, J.C., Anenberg, A., Etter, S., Martin, C., Puntenney-Desmond, K., Seibert, J., and I. van Meerveld (2018), Testing the waters: Mobile apps for crowdsourced streamflow data, EOS, 99, 

Hammond, J. C., Fleming, S. W., & Jones, J. A. (In review). Unexpected resilience of river basin water management to long-term streamflow reductions. Water Resources Research.

Sexstone G.A., J.M. Driscoll, L.E. Hay, & Hammond, J. C. (In review) Runoff sensitivity to snowmelt representation within a continental scale hydrologic model. Hydrological Processes.

Hammond, J. C. & Kampf, S. K. (In review). Sub-annual streamflow responses to rainfall and snowmelt inputs in snow-dominated watersheds of the western U.S.. Water Resources Research.

Kampf, S.K., Bhaskar, A.S., Green, T.R., Hammond, J.C., Erskine, R.H., Johnson, A., MacDonald, L., Schmeer, S., Sosa Pérez, G., Wagenbrenner, J., Wilson, C.. Empirical and model-derived rainfall thresholds for infiltration excess overland flow and surface erosion. Journal of Hydrologic Engineering

Robles, M.D., Hammond, J.C., Kampf, S.K., Biederman, J.C., Demaria, E.M.C. (In review). Winter Rain-on-Snow Buffers Streamflow Sensitivity to Snowpack Losses in the Salt River Watershed in Semi-Arid Southwest. Water Resources Research.

When gages run dry: How can we use non-perennial runoff records to inform us about the ecological and hydrologic status of river systems? (In review). Zimmer, M., Allen, D.A., Allen, G.; Blaszczak, Joanna; Burrows, R., Costigan, K., Dodds, W., Fritz, K., Godsey, S., Hammond, J.C., Kampf, S.K., Krabbenhoft, C.A., Olden, J., Ruhi, A., Shanafield, M., Ward, A., Zipper, S.C. WIREs (Wiley Interdisciplinary Reviews) Water.

Kampf, S.K., Burges S.J., Hammond, J.C., Covinom T.P., Eurich, A., Harrison, H., Martin, C., Puntenney-Desmond, K. (In review). Rethinking the role of the water balance in hydrologic research. Water Resources Research. 


Journal Reviewer

Water Resources Research (

Geophysical Research Letters (

Hydrology and Earth System Sciences (

Hydrological Sciences Journal (

Hydrological Processes (