Jan Hopmans
Professor; Hydrology Program; Department of Land; Air and Water Resources; Associate Dean; College of Agricultural & Environmental Sciences
UC Davis - University of California, Davis
Hopmans's UC Davis page
Ph.D., Auburn University, 1985
Research focuses on Vadose Zone Hydrology: soil physics, flow and transport modeling, soil moisture, microtomography, scaling techniques, plant root-soil water interactions, parameter optimization, soil hydraulic properties, climate change impacts, irrigation water management, soil moisture sensor development, soil salinity, forest hydrology.
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CZO Publications
Papers/Books
2018
Mechanisms controlling the impact of multi-year drought on mountain hydrology. Bales, R. C.; Goulden, M. L.; Hunsaker, C. T.; Conklin, M. H.; Hartsough, P. C.; O'Geen, A. T.; Hopmans, J. W.; Safeeq, M. (2018): Hydrological Processes: 10.1038/s41598-017-19007-0
2018
Southern Sierra Critical Zone Observatory and Kings River Experimental Watersheds: A Synthesis of Measurements, New Insights, and Future Directions. O'Geen, A.; Safeeq, M.; Wagenbrenner, J.; Stacy, E.; Hartsough, P.; Devine, S.; Tian, Z.; Ferrell, R.; Hopmans, J.W.; and Bales, R. (2018): Vadose Zone Journal, 17:180081
2014
Geophysical constraints on deep weathering and water storage potential in the Southern Sierra Critical Zone Observatory. Holbrook, W.S., Riebe, C.S., Elwaseif, M., Hayes, J.L., Harry, D. L., Basler-Reeder, K., Malazian, A., Dosseto, A., Hartsough, P. C., and Hopmans, J. W. (2014): Earth Surface Processes and Landforms, 39:366-380.
2012
Response to Comment on Soil moisture response to snowmelt and rainfall in a Sierra Nevada mixed-conifer forest. Hopmans, J.W., R.C. Bales, A.T. O'Geen, C.T. Hunsaker, D. Beaudette, P.C. Hartsough, A. Malazian, P. Kirchner, and Meadows, M. (2012): Vadose Zone Journal. 11
2011
Soil Moisture Response to Snowmelt and Rainfall in a Sierra Nevada Mixed-Conifer Forest. Bales, R.C., Hopmans, J., O'Geen, A.T., Meadows, M., Hartsough, P.C., Kirchner, P., Hunsaker, C.T., Beaudette, D. (2011): Vadose Zone J., 10:786-799.
2011
Interdisciplinary Sciences in a Global Network of Critical Zone Observatories. Lin, H., Hopmans, J. W., Richter, D. deB. (2011): Vadose Zone Journal 10: 781-785 Cross-CZO
2011
Evaluation of MPS-1 soil water potential sensor. Malazian, A., Hartsough, P.C., Kamai, T., Campbell, C.S., Cobos, D.R. and Hopmans, J.W. (2011): J. of Hydrology. 402:126-134.
2011
Simplified Multistep Outflow Method to Estimate Unsaturated Hydraulic Functions for Coarse-textured Soils. Nasta, P., Huynh, S., and Hopmans, J.W. (2011): Soil Sci. Soc. Amer. J. 75(2): 418-425.
2008
Sampling Strategies in forest hydrology and biogeochemistry. Bales, R.C., Conklin, M.H., Krekez, B., Glaser, S.D., Hopmans, J. W., Hunsaker, C.T., Meadows, M.W. (2008): Forest Hydrology and Biogeochemistry. Ecological Studies, Volume 216, Part 2, 29-44.
2008
Frequency, electrical conductivity and temperature analysis of low-cost moisture sensor . Kizito, F., Campbell, C.S., Campbell, G.S., Cobos, D.R., Teare, B.L., Carter, B. and Hopmans, J.W. (2008): J. Hydrology 352:367-378.
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Other CZO Publications
2015
Drought effects on evapotransiration and subsurface water storage in the southern Sierra Nevada. Bales, R., Goulden, M., Hunsaker, C., Conklin, M., Hartsough, P., O’Geen, A., Hopmans, J., Safeeq, M. (2015): H33M. The Hydrology-Vegetation-Climate Nexus: Identifying Process Interactions and Environmental Shifts in Mountain Catchments II, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2013
Southern Sierra Critical Zone Observatory: 2007-2013 Final Report to National Science Foundation. Bales, R. (2013): NSF Award 0725097
2013
Southern Sierra Critical Zone Observatory: 2012-2013 Annual Report to National Science Foundation. Bales, R. (2013): NSF Award 1239521
2013
Characterization of Water Use Patterns in the Deep Vadose Zone through Geoprobe Drilling into Weathered Bedrock. Hartsough, P.C., A.I. Malazian, M. Meadows, A.T. O’Geen, J. W. Hopmans. (2013): GSA 109th Cordilleran Section Meeting
2013
Timber harvest effect on soil moisture in the southern Sierra Nevada: Is there a measurable impact?. Meadows, M.W., R.C. Bales, M.H. Conklin, M. Goulden, P.C. Hartsough, J.W. Hopmans, C.T. Hunsaker, R.G. Lucas and A.I. Malazian (2013): American Geophysical Union, Fall Meeting 2013, abstract #H11B-1165
2012
Southern Sierra Critical Zone Observatory: 2011-2012 Annual Report to National Science Foundation. Bales, R. (2012): NSF Award 0725097
2012
Paired tree and soil instrumentation: what can we learn from two instrumented sites across various gradients in a forested catchment. Hartsough, P.C., Roudneva, E., Malazian, A.I., Meadows, M.W., Bales, R.C., and Hopmans, J.W. (2012): Fall meeting, American Geophysical Union, December 2012. Abstract H31G-1211.
2012
Geophysics in the Critical Zone: constraints on deep weathering and water storage potential in the Southern Sierra CZO. Holbrook, W., Riebe, C.S., Hayes, J.L., Reeder, K., Harry, D.L., Malazian, A.I., Dosseto, A., Hartsough, P.C., and Hopmans, J.W. (2012): Fall Meeting, American Geophysical Union, December 2012. Abstract EP41I-03.
2012
Modeling of soil and tree water status dynamics in a mixed-conifer forest of the Southern Sierra Critical Zone Observatory (Invited). Hopmans, J.W., Rings, J., Kamai, T., Mollaei Kandelous, M., Hartsough, P.C., and Vrugt, J.A. (2012): Fall Meeting, American Geophysical Union, December 2012. Abstract H52E-01.
2012
Soil moisture dynamics in deep Southern Sierra Nevada Soils. Malazian, A.I., Hartsough, P.C., and Hopmans, J.W. (2012): Fall meeting, American Geophysical Union, December 2012. Abstract H11B-1176.
2012
Comparing methods for quantifying soil moisture in the southern Sierra Nevada, California. Meadows, M, Hartsough, P.C., Hopmans, J.W., Malazian, A., Kerkez, B., Bales, R., Kelly, A., Goulden, M. (2012): Joint Meeting of the Second International Soil Sensing Technology Conference, the Soil Physics Technical Committee Annual Meeting. January 3-7, 2012
2012
Integrating soil water measurements from plot to catchment scale in a snow-dominated, mixed-conifer forest of the southern Sierra Nevada. Meadows, M.W., Hartsough, P.C., Bales, R.C., Hopmans, J.W., and Malazian, A.I. (2012): Fall Meeting, American Geophysical Union, December 2012. Abstract H31G-1198.
2011
Southern Sierra Critical Zone Observatory: 2010-2011 Annual Report to National Science Foundation . Bales, R. (2011): NSF Award 0725097
2011
Analysis of a Sierra Nevada white fir root biomass using terrestrial LiDAR and image processing . Eumont, E., Hartsough, P.C., Moradi, A.B., Hopmans, J.W. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract H51A-1177.
2011
Comparison of sap flux data from two instrumented tree species in a forested catchment with different levels of water stress. Hartsough, P.C. Roudneva, E., Malazian, A.I., Meadows, M.W., Kelly, A.E., Bales, R.C., Goulden, M., Hopmans, J.W. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract GC31A-1023.
2011
Comparing methods for quantifying soil moisture in the southern Sierra Nevada, California. Meadows, M.W., Hartsough, P.C., Kerkez, B., Bales, R.C., Kelly, A.E., Hopmans, J.W., Hedge, C., Goulden, M., Glaser, S.D. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract H41D-1054.
2011
Optimization of hydrological parameters in a Soil-Tree- Atmosphere Continuum model of a large White Fir. Rings, J., Kamai, T., Mollaei, M., Nasta, P., Vrugt, J.A., Hartsough, P.C., Hopmans, J.W. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract H51A-1187.
2010
Southern Sierra Critical Zone Observatory: 2009-2010 Annual Report to National Science Foundation. Bales, R. (2010): NSF Award 0725097
2010
Soil Moisture/ Tree Water Status Dynamics in Mid-Latitude Montane Forest, Southern Sierra Critical Zone Observatory, CA. Hartsough, P.C., Malazian, A., Meadows, M.W., Roudneva, K., Storch, J., Bales, R.C., Hopmans, J.W. (2010): Fall meeting, American Geophysical Union, December 2010. Abstract H11G-0894.
2010
Comparing plot-scale sensor measurements to the watershed level: a comprehensive case study of snow depth and soil moisture in the southern Sierra Nevada, California. Meadows, M.W., Kerkez, B., Hartsough, P.C., Lucas, R.G., Bales, R.C., Hopmans, J.W., Glaser, S.D. (2010): Fall meeting, American Geophysical Union, December 2010. Abstract C13C-03.
2009
Closing the Loop: Moisture dynamics across the soil/biotic interface in a mid-elevation forested landscape, Sierra Nevada, CA. Hartsough, P.; Malaizan, A.; Meadows, M.; Hopmans, J.W.; Bales, R. (2009): Ecological Society of America Annual Meeting, Albuquerque, NM
2009
Soil Moisture Tree Water Status Dynamics in a Mid-Latitude Montane Forest, Southern Sierra Critical Zone Observatory, CA . Hartsough, P.C., Malazian, A., Kamai, T., Roudneva, E., Hopmans, J.W., (2009): Fall meeting, American Geophysical Union, December 2009. 90(52) Abstract H33A-0844.
2009
Calibration and Testing of the MPS-1 Soil Matric Potential Sensor . Malaizan, A., Hartsough, P.C., Kamai, T., Cobos, D.R., Campbell, C.S., Hopmans, J.W. (2009): Fall meeting, American Geophysical Union, December 2009. 90(52). Abstract H31A-0740.
2009
Soil moisture response to snowmelt and rainfall across elevation, aspect and canopy cover in the Southern Sierra Nevada . Meadows, M.W., Bales, R.C., Hopmans, J.W., Hartsough, P.C., O'Geen, A.T., Kirchner, P.B. (2009): Fall meeting, American Geophysical Union, December 2009. 90(52). Abstract H33A-0856
2008
Snow and Soil Moisture Response Across Elevation, Aspect and Canopy Variables in a Mixed-conifer Forest, Southern Sierra Nevada. Bales, R., Meadows, M., Hopmans, J., Hartsough, P., Kirchner, P. (2008): Fall meeting, American Geophysical Union, December 2008. 89(53). Abstract C21A-0496.
2008
Remote Environmental Monitoring of Hydrologic Biotic Interaction in a Mountain Environment. Hartsough, P., Malazian, A., Tuli, A., Kamai, T., Kizito, F., Bales, R., Broad, A., Hopmans, J. (2008): Fall meeting, American Geophysical Union, December 2008. 89(53). Abstract H51H-0974.
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News
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Events
Soil and Tree Water Status Dynamics; Hopmans
Soil and Tree Water Status Dynamics in a Mixed-Conifer Forest of the Southern Sierra Critical Zone Observatory
CCC Rm 503.
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