Martha Conklin
Professor; School of Engineering
SNRI - Sierra Nevada Research Institute
Conklin's SNRI page
Professor; School of Engineering
UC Merced - University of California, Merced
Ph.D., The California Institute of Technology, 1986
Research focuses on groundwater-surface water interactions, determining timescales of reactions that occur at this interface as well as groundwater contributions to stream flow using natural tracers. This research is conducted at field sites as well as using labaoratory characterization and modeling. Current field sites are streams and meadows in the Sierra Nevada.
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CZO Publications
Papers/Books
2019 (In Review)
Evapotranspiration feedbacks shift annual precipitation-runoff relationships during multi-year droughts in a Mediterranean mixed rain-snow climate. Avanzi, F.; Rungee, J.; Maurer, T.; Bales, R.; Ma, Q.; Glaser, S.; Conklin, M. (2019): Hydrology & Earth System Sciences Discuss.
2018
Interdisciplinary Teaching about Earth and the Environment for a Sustainable Future Book Chapter: Implementing and Assessing InTeGrate Critical Zone Science Materials in an Undergraduate Geoscience Program. Ashlee Dere, Carol Engelmann, Timothy White, Adam Wymore, Adam Hoffman, James Washburne, Martha Conklin (2018): Springer Cross-CZO National
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
Spatially distributed water-balance and meteorological data from the rain-snow transition, southern Sierra Nevada, California. BALES, R., STACY, E., SAFEEQ, M., MENG, X., MEADOWS, M., OROZA, C., CONKLIN, M., GLASER, S., and WAGENBRENNER, J. (2018): Earth System Science Data, 10
2018
Spatially distributed water-balance and meteorological data from the Wolverton catchment, Sequoia National Park, California. BALES, R.C., STACY, E.M., MENG, X., CONKLIN, M.H., KIRCHNER, P.B., and ZHENG, Z (2018): Earth System Science Data, 10
2018
Subsurface plant-accessible water in mountain ecosystems with a Mediterranean climate. Klos, P. Z.; Goulden, M.; Riebe, C. S.; Tague, C.; O’geen, A. T.; Flinchum, B. A.; Safeeq, M.; Conklin, M. H.; Hart, S. C.; Berhe, A. A.; Hartsough, P. C.; Holbrook, S.; Bales R. C.; (2018): Hydrological Processes: 10.1002/wat2.1277
2017
Insights into hydrologic and hydrochemical processes based on concentration‐discharge and end‐member mixing analyses in the mid‐Merced River Basin, Sierra Nevada, California. Liu F., Conklin M.H., Shaw G.D (2017): Water Resources Research 53, 832–850
2017
Integrated Interdisciplinary Science of the Critical Zone as a Foundational Curriculum for Addressing Issues of Environmental Sustainability. Timothy White, Adam Wymore, Ashlee Dere, Adam Hoffman, James Washburne, and Martha Conklin (2017): Journal of Geoscience Education Vol. 65, No. 2, pp. 136-145 National
2017
Technical report: The design and evaluation of a basin-scale wireless sensor network for mountain hydrology. Zhang, Z.; Glaser, S.D.; Bales, R.C.; Conklin, M.; Rice, R.; Marks, D.G. (2017): Water Resources Research.
2016
Polymictic pool behaviour in a montane meadow, Sierra Nevada, CA. Lucas, R. G., Suárez, F., Tyler, S. W., Moran, J. E., and Conklin, M. H. (2016): Hydrological process. DOI: 10.1002/hyp.10834
2016
Polymictic pool behavior in a montane meadow, Sierra Nevada, CA. Lucas, R.G., Suárez, F. Tyler, S.W., Moran, J.E., Conklin, M.H. (2016): Hydologic Processes
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.
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Other CZO Publications
2019
Southern Sierra Critical Zone Observatory: 2018-2019 Annual Report to National Science Foundation. Bales, R.; Conklin, M.; Goulden, M.; Riebe, C.; Tague, C. (2019): NSF Award #1331939
2018
Southern Sierra Critical Zone Observatory: 2017-2018 Annual Report to National Science Foundation. Bales, R.; Tague, C.; Goulden, M.; Riebe, C.; Conklin, M. (2018): NSF Award #1331939
2017
Southern Sierra Critical Zone Observatory: 2016-2017 Annual Report to National Science Foundation. Bales, R. (2017): NSF Award #1331939
2017
Developing decision-relevant data and information systems for California water through listening and collaboration. Bales, R. C.; Bernacchi, L.; Conklin, M. H.; Viers, J. H.; Fogg, G. E.; Fisher, A.T.; Kiparky, M. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract PA33D-10.
2017
A Gap-Filling Procedure for Hydrologic Data Based on Kalman Filtering and Expectation Maximization: Application to Data from the Wireless Sensor Networks of the Sierra Nevada. Conklin, M. H.; Martin, S. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract EP53E-07.
2017
A Gap-Filling Procedure for Hydrologic Data Based on Kalman Filtering and Expectation Maximization: Application to Data from the Wireless Sensor Networks of the Sierra Nevada. Coogan, A.; Avanzi, R.; Conklin, M.H.; Bales, R.C.; Glaser, S. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract IN51E-0054
2017
Predicting Plant-Accessible Water in the Critical Zone: Mountain Ecosystems in a Mediterranean Climate. Klos, P. Z.; Goulden, M.; Riebe, C. S.; Tague, C.; O’geen, A. T.; Flinchum, B. A.; Safeeq, M.; Conklin, M. H.; Hart, S. C.; Berhe, A. A.; Hartsough, P. C.; Holbrook, S.; Bales R. C.; (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract H23H-1769.
2017
Using wireless sensor networks to improve understanding of rain-on-snow events across the Sierra Nevada. Maurer, A.; Avanzi, F.; Oroza, C.; Malek, S.; Glaser, S.; Bales, R.; Conklin, M. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract C53B-1025.
2017
Improving snow water equivalent simulations in an alpine basin using blended gage precipitation and snow pillow measurements. Sohrabi, M.; Safeeeq, M.; Conklin, M. H. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract H43C-1658
2017
Teaching climate science within the transdisciplinary framework of Critical Zone science . White, T.; Wymore, A.; Dere, A. L. D.; Washburne, J. C.; Hoffman, A.; Conklin, M. (2017): Fall Meeting, American Geophysical Union, December 2017. Abstract ED24A-02.
2017
Teaching climate science within the transdisciplinary framework of Critical Zone science (Invited). White, T.S., Wymore, A., Dere, A.L.D., Washburne, J.C., Hoffman, A., Conklin, M. (2017): 2017 American Geophysical Union Fall Meeting, New Orleans, LA, 11-15 Dec Cross-CZO
2016
Southern Sierra Critical Zone Observatory: 2015-2016 Annual Report to National Science Foundation. Bales, R. (2016): NSF Award #1331939
2016
Concentration-Discharge Relationship and Endmember Mixing in the Intermediate and Large Watersheds of the US West. Liu, F.; Miller, M.P.; Williams, M.W.; Conklin, M.H.; Yang, J.; Bales, R.C. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract H52E-06.
2016
Concentration-Discharge Relationship and Endmember Mixing in the Intermediate and Large Watersheds of the US West. Liu, F.; Miller, M.P.; Williams, M.W.; Conklin, M.H.; Yang, J.; Bales, R.C. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract H52E-06.
2016
Evaluation of Catchment Pairs and the Seasonal Effects of Drought on Source Water in Forested Mountain Streams . Martin, S., Conklin, M. (2016): Yosemite Hydroclimate Meeting
2016
Optimizing placements of ground-based snow sensors for areal snow cover estimation using a machine-learning algorithm and melt-season snow-LiDAR data. Oroza, C.; Zheng, Z.; Glaser, S.D.; Bales, R.C.; Conklin, M.H. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract C44A-08.
2016
Tracking water through the Southern Sierra Critical Zone Observatory using radioactive and stable isotopes . Thaw, M.; Visser, A.; Deinhart, A.L.; Sharp, M.; Everhart, A.; Bibby, R.K.; Conklin, M.H. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract H31K-07.
2016
Critical Zone Science as a Multidisciplinary Framework for Teaching Earth Science and Sustainability. Wymore, A.; White, T.S.; Dere, A.L.D.; Hoffman, A.; Washburne, J.C.; Conklin, M.H. (2016): Fall Meeting, American Geophysical Union, December 2016. Abstract ED13E-0954.
2015
Southern Sierra Critical Zone Observatory: 2014-2015 Annual Report to National Science Foundation. Bales, R. (2015): NSF Award 1331939
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.
2015
Montane meadow evapotranspiration: implications for restoration and impacts on downstream flow. Lucas, R., Conklin, M., Goulden, M. (2015): H11E Interacting Physical and Ecological Processes across Terrestrial and Aquatic Systems I Posters, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
Montane meadow evaportanspiration: implications for restoration and impacts on downstream flow. Lucas, R., Conklin, M., Goulden, M. (2015): . American Geophysical Union Fall Meeting. San Francisco, CA.
2015
Source Water Flow Pathways In Forested, Mountain, Headwater Streams: A Link Between Sediment Movement Patterns And Stream Water Chemistry . Martin, S., Conklin, M., Liu, F. (2015): H31D. Disturbance Hydrology: Assessing the Impacts of Abrupt Landscape Changes on Watershed Hydrology I Posters, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
In-situ monitoring of California’s drought: Impacts on key hydrologic variables in the Southern Sierra Nevada. Oroza, C., Zheng, Z., Zhang, Z., Glaser, S., Bales, R., Conklin, M. (2015): EP53A Earth and Planetary Surface Processes: General Contribution Posters, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
Optimization methods for multi-scale sampling of soil moisture and snow in the Southern Sierra Nevada . Oroza, C., Zheng, Z., Zhang, Z., Glaser, S., Bales, R., Conklin, M. (2015): H42B Hot Spots and Hot Moments at System Interfaces: Novel Sensors and Modeling Approaches for Transforming Understanding of Catchment Heterogeneity I, presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
Variability of Residence Time tracer Concentrations at the Southern Sierra Critical Zone Observatory during the California Drought. Visser, A., Thaw, M., Stacy, E., Hunsaker, C., Bibby, R., Deinhart, A.L., Schorzman, K., Egnatuk, C., Conklin, M., Esser, B. (2015): H21F Hydrochronology: Advances in Tracer Methods, Modeling Techniques, and Applications of Residence Times in Hydrology Research I Posters., presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2014
Southern Sierra Critical Zone Observatory: 2013-2014 Annual Report to National Science Foundation. Bales, R. (2014): NSF Award 1331939
2014
Determination of specific yield of montane meadow soils, Sierra Nevada, CA. R. Lucas; M. Conklin; R. Rice; T. Ghezzehei (2014): American Geophysical Union, Fall Meeting 2014, abstract #H53B-0852
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
Montane meadows and hydrologic connections between forests and streams in the Sierra Nevada, California. Lucas, R.G., and M.H. Conklin (2013): American Geophysical Union, Fall Meeting 2013, abstract #H43K-01
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
2013
Impacts of forest thinning and climate change on transpiration and runoff rates in Sierra Nevada mixed-conifer headwater catchments . Saksa, P.C., R.L. Ray, R.C. Bales, and M.H. Conklin. (2013): American Geophysical Union, Fall Meeting 2013, abstract #GC11B-0990
2013
Developing a robust wireless sensor network structure for environmental sensing. Zhang, Z., C. Oroza, S.D. Glaser, R.C. Bales and M.H. Conklin. (2013): American Geophysical Union, Fall Meeting 2013, abstract #C41B-0630
2012
Southern Sierra Critical Zone Observatory: 2011-2012 Annual Report to National Science Foundation. Bales, R. (2012): NSF Award 0725097
2012
Groundwater-surface water interactions in montane meadows of the Sierra Nevada, California. Lucas, R., Conklin, M. (2012): Fall meeting, American Geophysical Union, December 2012. Abstract H13D-1381.
2012
Forest management effects on snow, runoff and evapotranspiration in Sierra Nevada mixed-conifer headwater catchments. Ray, R.L., Saksa, P.C., Bales, R.C., and Conklin, M.H. (2012): Fall Meeting, American Geophysical Union, December 2012. Abstract GC51F-05.
2011
Southern Sierra Critical Zone Observatory: 2010-2011 Annual Report to National Science Foundation . Bales, R. (2011): NSF Award 0725097
2011
Hillslope and stream connections to water tables in montane meadows of the southern Sierra Nevada, California . Conklin, M.H., Lucas, R.G. (2011): Fall meeting, American Geophysical Union, December 2011. Abstract H43N-07.
2011
Physical and biogeochemical controls on polymictic behavior in Sierra Nevada stream pools. Lucas, R.G., Conklin, M.H., Tyler, S.W., Suarez, F.I., Moran, J.E., Esser, B.K. (2011): Fall meeting, American Geophysical Union, December 2011, Halls A-C, 8:00 AM. Abstract H51B-1209.
2010
Southern Sierra Critical Zone Observatory: 2009-2010 Annual Report to National Science Foundation. Bales, R. (2010): NSF Award 0725097
2010
Spatial and temporal variations of evapotranspiration signals in Long Meadow, Sequioa National Park, California . Conklin, M.H., Lucas, R.G. (2010): Fall meeting, American Geophysical Union, December 2010. Abstract H32C-03.
2010
Polymictic pool behavior in Sierra Nevada Streams. Lucas, R.G., Conklin, M.H., Tyler, S.W., Suarez, F.I., Moran, J.E., Esser, B.K. (2010): Fall meeting, American Geophysical Union, December 2010. Abstract H21B-1046.
2009
Southern Sierra Critical Zone Observatory: 2008-2009 Annual Report to National Science Foundation. Bales, R. (2009): NSF Award 0725097
2009
Seasonal transitions in water and moisture patterns in a mountain meadow, Southern Sierra Nevada (Invited) . Conklin, M.H., Crook, N.P., Kirchner, P.B., Lucas, R.G. (2009): Fall meeting, American Geophysical Union, December 2009. 90(52). Abstract H41H-01.
2008
Southern Sierra Critical Zone Observatory: 2007-2008 Annual Report to National Science Foundation. Bales, R. (2008): NSF Award 0725097
2008
"Hydroclimate, ecosystem links & the Southern Sierra Critical Zone Observatory. Bales, R; Hunsaker, C; Kirchner, P; Conklin, M; Lucas, R. (2008): Southern Sierra Science Symposium
2008
Investigating Meadow Hydrology and Hyporeic Exchange. Lucas, R., Conklin, M., Tyler, S., Esser, B. (2008): Fall meeting, American Geophysical Union, December 2008. 89(53). Abstract H21L-06.
2007
Southern Sierra Critical Zone Observatory (CZO): hydrochemical characteristics, science and measurement strategy. Bales, R.; Hunsaker, C.; Conklin, M.; Kirchner, J.; Bouer, B.; Kirchner, P. (2007): American Geophysical Union, Fall Meeting 2007, abstract #H51K-02
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News
Undergraduate course curriculum, “Introduction to Critical Zone Science,” available free online
01 Jan 2018 - A 15-week semester-long upper-level undergraduate course curriculum entitled “Introduction to Critical Zone Science” is now available free online.
Visiting the Water Source: A Tour of the Kings River Headwaters
06 Nov 2017 - By Michelle Gilmore and Leigh Bernacchi Ever wonder how we know what we know about water? Twenty-five intrepid water and forest managers,...
Water Resources Research Special Collection: Concentration-discharge relations in the critical zone
30 Oct 2017 - Water Resources Research published a new special collection in September 2017 featuring concentration-discharge research from multiple CZOs.
New SSCZO comic artfully communicates research
19 Jul 2017 - Wonder what soils and sponges have in common? Or why some trees in the Sierra Nevada are dying while others are surviving? Find out in our new comic.
UCTV: Southern Sierra CZO researchers featured on Sustainable California channel
21 Jun 2017 - University of California Television (UCTV) features Bales, Conklin, Glaser, Safeeq, and others on the new Sustainable California channel
CZNews: Spring 2017
01 May 2017 - CZO Newsletter CZNews: Spring 2017
Pushing the Limits on Water Isotope Measurement: Lawrence Livermore and UC Merced
20 Dec 2016 - Lawrence Livermore and UC Merced researchers are tracking water through the critical zone using cutting-edge technology and new collection methods.
NY Times: Sierra Nevada Snow Won’t End California’s Thirst
11 Apr 2016 - New York Times reporter, Henry Fountain spoke with Southern Sierra CZO PIs Roger Bales and Martha Conklin and investigtor Mohammad Safeeq as they...
White House Water Summit: UC Water joins the call to action with technology pioneered at SSCZO
22 Mar 2016 - As part of World Water Day, the White House is hosting a Water Summit today and released its Commitments to Action on Building a Sustainable...
Hands-on learning exercises available from CZOs
10 Jun 2014 - CZO and AGI create succinct exercises for secondary education classrooms. The exercises are based on CZO data and were distributed to 16,000 teachers
Critical Zone Science & Management Course
06 May 2014 - Critical Zone Science & Management Class ENVS‐GEO‐HWR 422/522 in Fall 2014
CZO researchers present at GSA in Denver
04 Nov 2013 - CZO researchers presented the results of various scientific studies at the 125th annual meeting of the Geological Society of America.
InTeGrating CZO Science
06 Jun 2013 - During the week of May 19, five faculty members interested in Critical Zone science traveled to Northfield, MN to participate in an InTeGrate...
CZO team to develop a new course through InTeGrate
01 Apr 2013 - CZO education and outreach team receives funding from NSF-sponsored InTeGrate project to develop an undergraduate course in Critical Zone science.
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Events
Southern Sierra Headwaters Tour
Presented by Southern Sierra Critical Zone Observatory, UC Water, & USDA Forest Service Pacific Southwest Research Station
Prather & Shaver Lake CA. REGISTRATION REQUIRED..Sierran Montane Meadows; Conklin
Montane meadows as a window into groundwater processes in Sierra Nevada Catchments
CCC Rm 207, Denver. CO.
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