Rina Schumer Profile Photo
Dr. Rina Schumer
Assistant Vice President of Academic and Faculty Affairs

Professional Interests

Dr. Schumer’s primary research interests involve stochastic models for environmental processes. She uses mathematical models to understand subsurface transport in porous and fractured media, surface-subsurface exchange, sediment transport, as well as geomorphic processes and their signature in the geologic record. Using her background in applied mathematics, she also has projects that employ optimization techniques, time series analysis, extreme value theory, and probability and statistics.

Research Areas

  • Hydrology/Hydrogeology
  • Stochastic Processes
  • Optimization
  • Extreme Value Theory
  • Environmental Transport Processes
  • Statistical Hydrology
  • Stratigraphy
  • Geomorphology


Ph.D.2002University of Nevada, RenoHydrogeology
M.S.2000University of Nevada, Reno,Applied Mathematics
M.S.1997University of Nevada, Reno,Hydrogeology
B.S.1992Wesleyan UniversityEarth and Environmental Sciences

Academic Affiliations


Contaminant transport, probability, groundwater, advection-dispersion, sediment transport, stratigraphy, model, earth surface dynamics, hyporheic, mathematical, hydraulics, water supply, water quality


Schumer, R. (2020). Impacts of suspended clay particle deposition on sand-bed morphodynamics, Water Resources Research, Accepted.10.1029/2019WR027010

Kostadinov, T. S., Schumer, R., Hausner, M. B., Bormann, K. J., Gaffney, R., McGwire, K. C., Painter, T. H., Tyler, S., Harpold, A. A. (2019). Watershed-Scale Mapping of Fractional Snow Cover Under Conifer Forest Canopy Using Lidar, Remote Sensing of Environment, 222, 34-49, 10.1016/j.rse.2018.11.037
Fang, Z., Carroll, R. W., Schumer, R., Harman, C., Wilusz, D., Williams, K. H. (2019). Streamflow partitioning and transit time distribution in snow-dominated basins as a function of climate, Journal of Hydrology, 570, 726-738, 10.1016/j.hydrol.2019.01.029
Carroll, R. W., Deems, J. S., Niswonger, R., Schumer, R., Williams, K. H. (2019). The importance of interflow for groundwater recharge in a snowmelt-dominated headwater basin, Geophysical Research Letters, 46 (11), 5899-5908, 10.1029/2019GL082447
Doane, T. H., Furbish, D. J., Roering, J. J., Schumer, R., Morgan, D. J. (2018). Nonlocal sediment transport on steep lateral moraines, eastern Sierra Nevada, California, USA, Journal of Geophysical Research: Earth Surface, Article ID: JGRF20790, 10.1002/2017JF004325
Zhang, L., Stark, C., Schumer, R., Kwang, J., Li, T., Fu, X., Wang, G., Parker, G. (2018). The Advective-Diffusive Morphodynamics of Mixed Bedrock-Alluvial Rivers Subjected to Spatiotemporally Varying Sediment Supply, Journal of Geophysical Research: Earth Surface, 10.1029/2017JF004431
Furbish, D. J., Roering, J. J., Keen-Zebert, A. K., Almond, P., Doane, T. H., Schumer, R. (2018). Soil Particle Transport and Mixing Near a Hillslope Crest: 2. Cosmogenic Nuclide and Optically Stimulated Luminescence Tracers, Journal of Geophysical Research: Earth Surface, 123 (5), 1078-1093
Furbish, D., Schumer, R., Keen-Zebert, A. K. (2018). The rarefied (non-continuum) conditions of tracer particle transport in soils, with implications for assessing the intensity and depth dependence of mixing from geochronology, Earth Surface Dynamics, 6 (4), 1169-1202
Furbish, D. J., Fathel, S. L., Schmeeckle, M. W., Jerolmack, D. J., Schumer, R. (2017). The Elements and Richness of Particle Diffusion During Sediment Transport at Small Timescales, Earth Surface Processes and Landforms, 42 (1), 214-237, 10.1002/esp.4084
Schumer, R., Taloni, A., Furbish, D. (2017). Theory connecting non-local sediment transport, earth surface roughness, and the Sadler effect, Geophysical Research Letters, n/a-n/a, 10.1002/2016GL072134
Harpold, A. A., Kaplan, M. L., Klos, P. Z., Link, T., McNamara, J. P., Rajagopal, S., Schumer, R., Steele, C. M. (2017). Rain or Snow: Hydrologic Processes, Observations, Prediction, and Research Needs, Hydrol. Earth Syst. Sci., 21 (1), 1-22, 10.5194/hess-21-1-2017
Harpold, A. A., Rajagopal, S., Crews, J. B., Winchell, T., Schumer, R. (2017). Relative Humidity Has Uneven Effects on Shifts from Snow to Rain Over the Western US, Geophysical Research Letters, 44 (19), 9742-9750, 10.1002/2017GL075046
Pelosi, A., Schumer, R., Parker, G., Ferguson, R. I. (2016). The cause of advective slowdown of tracer pebbles in rivers: Implementation of Exner-Based Master Equation for coevolving streamwise and vertical dispersion, Journal of Geophysical Research, Earth Surface, 121, 10.1002/2015JF003497
Furbish, D. J., Schmeeckle, M. W., Schumer, R., Fathel, S. L. (2016). Probability Distributions of Bed-load Particle Velocities, Accelerations, Hop Distances and Travel Times Informed by Jaynes’s Principle of Maximum Entropy, Journal of Geophysical Research: Earth Surface, Accepted. 10.1002/2016JF003833

Backes, T. M., Kaplan, M. L., Schumer, R., Mejia, J. F. (2015). A Climatology of the Vertical Structure of Water Vapor Transport to the Sierra Nevada in Cool Season Atmospheric River Precipitation Events, J. Hydrometeor., 16 (3), 1029-1047 , 10.1175/JHM-D-14-0077.1
Aubeneau, A., Drummond, J., Schumer, R., Bolster, D., Tank, J. L., Packman, A. I. (2015). Effects of benthic and hyporheic reactive transport on breakthrough curves, Freshwater Science, 34 (1), 10.1086/680038
Pearson, C., Schumer, R., Trustman, B. D., Rittger, K., Johnson, D. W., Obrist, D. (2015). Nutrient and Mercury Deposition and Storage in an Alpine Snowpack of the Sierra Nevada, USA, Biogeosciences, 12, 3665-3680, 10.5194/bg-12-3665-2015
Aubeneau, A. F., Martin, R., Bolster, D., Schumer, R., Jerolmack, D., Packman, A. (2015). Fractal patterns in riverbed morphology produce fractal scaling of water storage times, Geophys. Res. Lett., 42, 10.1002/2015GL064155.
McDonald, E. V., Schumer, R. (2015). Use of Ground-Based LiDAR for Detection of IED Command Wires on Typical Desert SurfacesUse of Ground-Based LiDAR for Detection of IED Command Wires on Typical Desert Surfaces, In Military Geosciences and Desert Warfare: Past Lessons and Modern Challenges, Springer Verlag
Johnson, Z. C., Warwick, J. J., Schumer, R. (2015). A numerical investigation of the potential impact of stream restoration on in-stream N removal, Ecological Engineering, 83, 96–107, 10.1016/j.ecoleng.2015.05.024
Cooper, C. A., Crews, J. B., Schumer, R., Breitmeyer, R. J., Voepel, H. E., Decker, D. L. (2014). Experimental investigation of transient thermal convection in porous media, Transport in Porous Media, 104 (2), 335-347, 10.1007/s11242-014-0337-0
Schumer, R. (2014). Hydrologic Modeling II: Stochastic ProcessesHydrologic Modeling II: Stochastic Processes, In Handbook of Engineering Hydrology, 646, CRC Press
Finnegan, N. J., Schumer, R., Finnegan, S. (2014). A signature of transience in bedrock river incision rates over timescales of 10^4-10^7 years, Nature, 505, 391–394, January 16, 2014
Sturchio, N. C., Beloso, Jr., A., Heraty, L. J., Wheatcraft, S. W., Schumer, R. (2014). Isotopic tracing of perchlorate sources in groundwater from Pomona, Californ ia, Applied Geochemistry, 10.1016/apgeochem.2014.01.012
Pelosi, A., Parker, G., Schumer, R. (2014). Exner based Master Equation for transport and dispersion of river pebble tracers: derivation, asymptotic forms, and quantification of nonlocal vertical dispersion, Journal of Geophysical Research – Earth Surface, 10.1002/2014JF003130
Johnson, Z. C., Schumer, R., Warwick, J. J. (2014). Factors affecting hyporheic and surface transient storage in a western U.S. river, Journal of Hydrology, 510, 325–339, 10.1016/j.jhydrol.2013.12.037
Baeumer, B., Zhang, Y., Schumer, R. (2014). Incorporating super-diffusion due to sub-grid heterogeneity to capture non-Fickian transport, Groundwater, 10.1111/gwat.12267
Johnson, Z. C., Warwick, J. J., Schumer, R. (2014). Nitrogen retention in the main channel and two transient storage zones during nutrient addition experiments, Limnology and Oceanography, DOI:10.1002/lno.10006, 10.1002/lno.10006
Voepel, H. E., Schumer, R., Hassan, M. A. (2013). Sediment residence time distributions: theory and application from bed elevation measurements, Journal of Geophysical Research – Earth Surface, 10.1002/jgrf.20151
Zhu, J., Forsee, W. J., Schumer, R., Gautam, M. (2012). Future projections and uncertainty asseessment of extreme rainfall intensity in the United States from an ensemble of climate models, Climatic Change, 10.1007/s10584-012-0639-6
Chen, L., Schumer, R., Forsee, W. J., Knust, A. M. (2012). Impact of Temporal Resolution of Flow-Duration curve on Sediment Load Estimation, Journal of the American Water Resources Association, 48, 145-155
Martin, R. L., Jerolmack, D. J., Schumer, R. (2012). The physical basis for anomalous diffusion in bedload transport, J. Geophys. Res, 10.1029/2011JF002075.
Drummond, J. D., Covino, T. P., Aubeneau, A. F., Leong, D., Patil, S., Schumer, R., Packman, A. I. (2012). Effects of solute breakthrough curve tail truncation on residence time estimates: A synthesis of solute tracer injection studies, Journal of Geophysical Research, 117, 10.1029/2012JG002019
Schumer, R., Knust, A. M., Boyle, D. P. (2012). Characteristics of ephemeral hydrographs in the Southwestern United States, Journal of Hydrologic Engineering, 10.1061/(ASCE)HE.1943-5584.0000643
Hassan, M. A., Voepel, H. E., Schumer, R., Parker, G., Fraccarollo, L. V. (2012). Displacement characteristics of coarse fluvial bed sediment, Journal of Geophysical Research – Earth Surface, 10.1029/2012JF002374
Patil, S., Covino, T. P., Packman, A. I., Drummond, J. D., Payn, R., Schumer, R., McGlynn, B. (2012). Intra-stream variability in solute transport in rivers: Geomorphic controls on tailing behavior, Journal of Geophysical Research – Earth Surface, 10.1029/2012JF002455
McGraw, D. S., Pohll, G. M., Schumer, R., Shanafield, M. (2011). Development of tools to estimate Truckee River conveyance losses, Hydrogeology Journal, 10.1007/s10040-010-0701-2
Voepel, H. E., Ruddell, B., Schumer, R., Troch, P. A., Brooks, P., Neal, A., Durcik, M., Sivapalan, M. (2011). Quantifying the role of climate and landscape characteristics on hydrologic partitioning and vegetation response, Water Resources Research
Schumer, R., Jerolmack, D. J., McElroy, B. (2011). The stratigraphic filter and bias in measurement of geologic rates, Geophys. Res. Lett, 10.1029/2011GL047118
Thompson, S. E., Harman, C. J., Schumer, R., Wilson, J. S., Basu, N. B., Brooks, P. D., Donner, S. D., Hassan, M. A., Packman, A. I., Rao, P. S., Troch, P. A., Sivapalan, M. (2011). Patterns, puzzles and people: implementing hydrologic synthesis, Hydrological Processes, 10.1002/hyp.8234
Schumer, R., Baeumer, B., Meerschaert, M. (2010). Extremal behavior of a coupled continuous time random walk, Physica A, 10.1016/j.physa.2010.10.018
Schumer, R., Jerolmack, D. J. (2009). Real and apparent changes in sediment deposition rates through time., Journal of Geophysical Research – Earth Surface, 114, 10.1029/2009JF001266
Schumer, R., Baeumer, B., Meerschaert, M. M. (2009). Fractional advection-dispersion equations for modeling transport at the Earth surface, Journal of Geophysical Research, 114, 10.1029/2008JF001246
Schumer, R., Benson, D. A., Meerschaert, M. M. (2007). Recurrence of extreme events with power law interarrival times, Geophysical Research Letters, 34, 10.1029/2007GL030767
Schumer, R., Benson, D. A., Meerschaert, M. M., Baeumer, B. (2003). Multiscaling fractional advection-dispersion equations and their solutions, Water Resources Research, 39, 10.1029/2001WR001229
Schumer, R., Benson, D. A., Meerschaert, M. M., Baeumer, B. (2003). Fractal mobile/immobile solute transport, Water Resources Research, 39, 10
Benson, D. A., Schumer, R., Wheatcraft, S. W., Meerschaert, M. M. (2001). Fractional dispersion, Levy motion, and the MADE tracer tests, Transport in Porous Media, 42, 211-240
Schumer, R., Benson, D. A., Meerschaert, M. M., Wheatcraft, S. W. (2001). Eulerian derivation of the fractional advection-dispersion equation, Journal of Contaminant Hydrology, 48, 69-88
Conference Proceedings
Carroll, R. W., Manning, A., Niswonger, R., Marchetti, D., Morway, E., Schumer, R., Williams, K. (2019). Baseflow Age Distributions in a Snow-Dominated Headwater Stream as a Function of Climate and Watershed Structure, American Geophysical Union Fall Meeting (Invited): San Francisco, CA, December 9, 2019-December 13, 2019, Presented.
Culpepper, J. A., Chandra, S., Schumer, R. (2019). Land to lake: connections between winter snowpack, ice out date and spring turnover, AGU
Dallmann, J., Phillips, C., Teitelbaum, Y., Arnon, S., Sund, N. L., Schumer, R., Packman, A. (2019). Interplay between hyporheic exchange and bedform morphodynamics in mobile clay-sand beds, AGU
Teitelbaum, Y., Dallmann, J., Phillips, C., Packman, A., Schumer, R., Sund, N. L., Hansen, S., Arnon, S. (2019). Impact of Clay Addition Size on Hyporheic Exchange During Bedform Migration, AGU
Arnon, S., Teitelbaum, Y., Dallmann, J., Phillips, C., Schumer, R., Sund, N. L., Packman, A. (2019). Coupling between bedform migration, deposition of fine suspended particles, and hyporheic exchange flux, EGU General Assembly: Vienna, Austria, April 7, 2019-April 12, 2019, Presented.
Carroll, R. W., Bearup, L., Fang, Z., Schumer, R., Deems, J., Brown, W., Bill, M., Dong, W., Williams, K. (2018). The Influence of Snow Accumulation on Groundwater Flux to Streams in a Colorado River Headwater Basin
Drummond, J., Bernal, S., Meredith, W., Schumer, R. (2018). Physical and biogeochemical processes driven by point source inputs of fine particles to intermittent streams, 18181
Fang, Z., Carroll, R. W., Schumer, R., Harman, C., Wilusz, D., Williams, K. (2018). Hydrologic connectivity in snow-dominated basins as a function of climate
Robins, T., Schumer, R. (2018). Nonpoint source flux impact studies for wellhead treatment costs
Teitelbaum, Y., Dallmann, J., Phillips, C., Packman, A., Schumer, R., Sund, N. L., Arnon, S. (2018). Effect of Fine Particle Deposition On Hyporheic Exchange Flux Under Mobile-Bedform Conditions
Zhang, Y., Meerschaert, M. M., Baeumer, B., Schumer, R., LaBolle, E. M. (2013). TEST-RWHet-v1.0: A software suite using the tempered stable models to simulate preasymptotic pollutant transport in multi-dimensional natural media, Proceedings of MODFLOW and MORE 2013: Translating Science into Practice
Johnson, Z. C., Schumer, R., Warwick, J. J. (2012). Physical and biological N retention in two transient storage zones of the lower Truckee River, NV, H13D-1379, 2012 AGU Fall Meeting: San Francisco
Voepel, H. E., Schumer, R., Ruddell, B., Brooks, P. D., Troch, P., Neal, A., Durcik, M., Sivapalan, M. (2010). Hydrologic controls on catchment-scale vegetation productivity