Breadcrumb

Office: Campus Box 450, Boulder, CO 80309
Prounouns: SHE/they
Bio
Investigating water flow dynamics and pathways in vegetation, soil and streams.
Education
- PhD: Oregon State University, 2009
- MS: Colorado State University, 2000
- BS: University of Washington, 1998
Awards
- Excellence Award, Boulder Faculty Assembly, 2021
- Post-doctoral Fellow, National Science Foundation, 2009
- Horton Research Grant, American Geophysical Union, 2007
- Pre-doctoral Fellow, Ford Foundation, 2005
- Minority Pipeline Fellow, Oregon State University, 2004
Research
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; linking carbon and water dynamics in the critical zone; and examining the influence of micro-climate on tree function using stable isotope analysis of tree rings.
Poster for the Ecohydrology Lab. Modified from Sammy Katta.
Publications
For additional publications, see Holly's ORCID profile.
Leveraging Groundwater Dynamics to Improve Predictions of Summer Low-Flow Discharges
Johnson K; Harpold A; Carroll RWH; Barnard H; Raleigh MS; Segura C; Li L; Williams KH; Dong W; Sullivan PL...
- Johnson K
- Harpold A
- Carroll RWH
- Barnard H
- Raleigh MS
- Segura C
- Li L
- Williams KH
- Dong W
- Sullivan PL
Publication Date: 2023-08-01
Type: Journal Article
Seeing the Disturbed Forest for the Trees: Remote Sensing Is Underutilized to Quantify Critical Zone Response to Unprecedented Disturbance
Hwang K; Harpold AA; Tague CL; Lowman L; Boisrame GFS; Lininger KB; Sullivan PL; Manning A; Graup L; Litvak M...
- Hwang K
- Harpold AA
- Tague CL
- Lowman L
- Boisrame GFS
- Lininger KB
- Sullivan PL
- Manning A
- Graup L
- Litvak M
Publication Date: 2023-08-01
Type: Journal Article
An integrated framework for exploring critical zone architecture and evolution
Singha K; Sullivan PL; Billings SA; Walls L; Jarecke KM; Li L; Barnard HR; Gasparini NM; Madoff RD; Dhital S...
- Singha K
- Sullivan PL
- Billings SA
- Walls L
- Jarecke KM
- Li L
- Barnard HR
- Gasparini NM
- Madoff RD
- Dhital S
Type: Journal Article
Measuring Tree Sway Frequency with Videos for Ecohydrologic Applications: Assessing the Efficacy of Eulerian Processing Algorithms
Type: Journal Article
Ecohydrologic Dynamics of Rock Moisture in a Montane Catchment of the Colorado Front Range
Publication Date: 2023-06-01
Type: Journal Article
Navigating the fluid funding landscape
Publication Date: 2023-02-01
Type: Journal Article
Examining spatial variation in soil solutes and flowpaths in a semi-arid, montane catchment
Publication Date: 2022-11-09
Type: Journal Article
Embracing the dynamic nature of soil structure: A paradigm illuminating the role of life in critical zones of the Anthropocene
Sullivan PL; Billings SA; Hirmas D; Li L; Zhang X; Ziegler S; Murenbeeld K; Ajami H; Guthrie A; Singha K...
- Sullivan PL
- Billings SA
- Hirmas D
- Li L
- Zhang X
- Ziegler S
- Murenbeeld K
- Ajami H
- Guthrie A
- Singha K
Publication Date: 2022-02-01
Type: Journal Article
Spatiotemporal patterns in hydrologic connectivity within a semi-arid montane headwater catchment in central Colorado
Type: Journal Article
Exploring Environmental Factors That Drive Diel Variations in Tree Water Storage Using Wavelet Analysis
Publication Date: 2021-08-25
Type: Journal Article
Summer runoff generation in foothill catchments of the Colorado Front Range
Publication Date: 2021-04-19
Type: Journal Article
The influence of land cover and storm magnitude on hydrologic flowpath activation and runoff generation in steep tropical catchments of central Panama
Publication Date: 2021-03-10
Type: Journal Article
Precipitation Characteristics and Land Cover Control Wet Season Runoff Source and Rainfall Partitioning in Three Humid Tropical Catchments in Central Panama
Publication Date: 2021-02-01
Type: Journal Article
Increasing plant water stress and decreasing summer streamflow in response to a warmer and wetter climate in seasonally snow-covered forests
Publication Date: 2021-01-01
Type: Journal Article
Assessing plot-scale impacts of land use on overland flow generation in Central Panama
Publication Date: 2020-10-16
Type: Journal Article
Long-term hydrological response to forest harvest during seasonal low flow: Potential implications for current forest practices
Publication Date: 2020-08-15
Type: Journal Article
The pantropical response of soil moisture to El Nino
Solander KC; Newman BD; de Araujo AC; Barnard HR; Berry ZC; Bonal D; Bretfeld M; Burban B; Candido LA; Celleri R...
- Solander KC
- Newman BD
- de Araujo AC
- Barnard HR
- Berry ZC
- Bonal D
- Bretfeld M
- Burban B
- Candido LA
- Celleri R
Publication Date: 2020-05-11
Type: Journal Article
Water Table Depth and Bedrock Permeability Control Magnitude and Timing of Transpiration-Induced Diel Fluctuations in Groundwater
Publication Date: 2020-05-01
Type: Journal Article
Transpiration- and precipitation-induced subsurface water flow observed using the self-potential method
Publication Date: 2019-06-30
Type: Journal Article
Reevaluating growing season length controls on net ecosystem production in evergreen conifer forests
Publication Date: 2018-12-19
Type: Journal Article
A sprinkling experiment to quantify celerity-velocity differences at the hillslope scale
Publication Date: 2017-11-27
Type: Journal Article
A sprinkling experiment to quantify celerity–velocity differences at the hillslope scale
Publication Date: 2017-11-27
Type: Journal Article
Topoclimate effects on growing season length and montane conifer growth in complex terrain
Publication Date: 2017-05-01
Type: Journal Article
Topographically driven differences in energy and water constrain climatic control on forest carbon sequestration
Publication Date: 2017-04-01
Type: Journal Article
The role of stable isotopes in understanding rainfall interception processes: a review
Publication Date: 2017-01-01
Type: Journal Article
Pages
Teaching
Students in Forest Geography examine soils in the sub-alpine of the Niwot Ridge LTER
Courses
- GEOG 5241: Stable Isotopes in Environmental Science
- Survey of recent topics and literature involving applications of stable isotope ratio method in ecological and environmental science
- GEOG 5241: Ecohydrology and Soils
- Survey of current topics and literature related to ecohydrology, soil, and disturbance
- GEOG 5161: Research Design in Geography
- Graduate seminar that reads and discusses contemporary research philosophies and methodologies. Practices the development of research proposals and presentation of research ideas.
- GEOG 5100-002: Writing and Presenting in Physical Science
- Graduate seminar on scientific writing and presentation skills, with focus on clarity, structure and common pitfalls in our communications. We will also discuss approaches to reviewing papers, writing reviews, and responding to reviewers.
Dr. Holly Barnard introduces transpiration measurement techniques to graduate students at the HJ Andrews Experimental Forest.
- GEOG 5100: The Earth's Critical Zone
- A graduate level reading, writing, and discussion course focused on catchment scale critical zone processes with specific attention given to carbon-water interactions.
- GEOG 4371/5371: Forest Geography
- Examines of principles of forest ecology with focus on individual tree responses to environmental factors and species interactions within communities
- GEOG 3511: Introduction to Hydrology
- Introduction to both the principles of hydrology as well as the techniques that can be used to solve hydrologic problems. The goal is to give students a balanced view of hydrology- one that includes a description of the physical processes as well as a coherent presentation of the theories and techniques that are used in practice.
- GEOG 1001: Environmental Systems I: Climate and Vegetation
- Introduction to the atmospheric environment of the Earth: elements and controls of climate and their implications for weather, vegetation and biodiversity
Current students & postdocs
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Outreach
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