My research is focused on investigating how vegetation processes affect water flow dynamics and pathways in soil and streams, and conversely, how water flow paths affect vegetation function in mountainous terrain. The ultimate goal is to improve our knowledge of how changes in land-use and/or climate will affect water resources and ecosystems. This interdisciplinary research uses state-of-the-art techniques to reveal patterns and processes at scales ranging from the leaf to the watershed. Some current topics include: evapo-transpiration partitioning using stable isotopes; impact of bark beetle outbreaks on forest water yield in southern Wyoming; and examining the influence of micro-climate on tree function using stable isotope analysis of tree rings
Barnard, H.R., C.B. Graham, W.J. Van Verseveld, J.R. Brooks, B.J. Bond, and J.J. McDonnell. (2010). Mechanistic assessment of hillslope transpiration controls of diel sub-surface flow: a steady-state irrigation approach. Ecohydrology 3: 133–142 .
Brooks, J.R., H. Barnard, R. Coulombe, and J. McDonnell. (2010). Ecohydrologic separation of water between trees and streams in a Mediterranean climate. Nature Geoscience.
Graham, C.B., H.R. Barnard, W.J. Van Verseveld, and J.J. McDonnell. (2010). Closing the Water Balance: a hillslope scale sprinkling experiment. Hydrological Processes .
Pypker, T.G., H.R. Barnard, M. Hauck, E.W. Sulzman, M.H. Unsworth, A.C. Mix, A. Kennedy, and B.J. Bond. (2009). Can carbon isotopes be used to predict watershed scale transpiration? . Water Resources Research 45, W00D35.
Pypker, T.G., M. Hauck, E.W. Sulzman, M.H. Unsworth, A.C. Mix, Z. Kayler, D. Conklin, A. Kennedy, H.R. Barnard and B.J. Bond. (2008). Toward using δ13C of ecosystem respiration to monitor canopy physiology in complex terrain. Oecologia, 158, 399-410.
Publications updated February 2011
The Barnard Ecohydrology lab is growing! We are always looking for well-qualified, enthusiastic students to join our group. Undergraduates interested in research experience or potential senior projects should contact Dr. Barnard.
Potential graduate students are encouraged to contact Dr. Barnard in advance of applying to the department to discuss research project and funding opportunities.
"What's New" updated February 2011