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146 results on '"Kelleher, Christa"'

11. Closing the gap between science and management of cold‐water refuges in rivers and streams

Author

Mejia, Francine H., primary, Ouellet, Valerie, additional, Briggs, Martin A., additional, Carlson, Stephanie M., additional, Casas‐Mulet, Roser, additional, Chapman, Mollie, additional, Collins, Mathias J., additional, Dugdale, Stephen J., additional, Ebersole, Joseph L., additional, Frechette, Danielle M., additional, Fullerton, Aimee H., additional, Gillis, Carole‐Anne, additional, Johnson, Zachary C., additional, Kelleher, Christa, additional, Kurylyk, Barret L., additional, Lave, Rebecca, additional, Letcher, Benjamin H., additional, Myrvold, Knut M., additional, Nadeau, Tracie‐Lynn, additional, Neville, Helen, additional, Piégay, Herve, additional, Smith, Kathryn A., additional, Tonolla, Diego, additional, and Torgersen, Christian E., additional

Published
2023
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20. Impacts of a beaver dam analogue complex on streambed vertical hydraulic gradients in a 1.2‐km stream reach in Wyoming, USA.

Author

Cero, Amyel Dale L., Kelleher, Christa A., and Shaw, Stephen B.

Subjects
BEAVERS, MEANDERING rivers, DAMS, WATER table, SPATIAL variation, NET losses
Abstract

Beaver dam analogues (BDAs) have seen growing use as restoration structures across the western United States. This study investigates the patterns in streambed upwelling and downwelling along a 1.2‐km stream reach in Red Canyon Creek (RCC), Wyoming before and after the installation of 31 new BDAs and the upgrade of four existing BDAs in July 2021. Over 100 mini‐piezometers were used to measure upwelling and downwelling in low‐flow, summer periods as quantified by vertical hydraulic gradient (VHG). Both before and after BDA installation, the stream reach was dominated by downwelling patterns, suggesting that RCC was a net losing stream during this summer period, with and without BDAs. While there were spatial variations in VHG before BDA installation, this variation was not dependent on stream depth, water surface concavity, sediment characteristics, and position relative to meanders, suggesting that unobservable subsurface properties may be a control on VHG or that there are attributes that were not captured due to the 10‐m spacing of mini‐piezometers. After BDA installation, VHGs were primarily related to the magnitude of the elevation gradient across the BDA. VHGs were highest near the BDAs and diminished once moving more than a few metres from the BDAs. When VHGs were averaged over the full reach length, BDAs appeared to slightly enhance net stream loss, albeit we could not control for possible seasonal differences in water table gradient during the observtion period. [ABSTRACT FROM AUTHOR]

Published
2023
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25. Best Management Practices for Teaching Hydrologic Coding in Physical, Hybrid, and Virtual Classrooms

Author

Kelleher, Christa A., Gannon, John P., Jones, C. Nathan, and Aksoy, Şule

Subjects
Coding education, ComputingMilieux_COMPUTERSANDEDUCATION, STEM education, Hydrogeology, Hydrology, Computational thinking
Abstract

As the field of hydrologic sciences continues to advance, there is an increasing need to develop a workforce with tools to curate, manage, and analyze large datasets. As such, undergraduate and graduate curricula are beginning to regularly incorporate scientific programing in the classroom. However, there are several key challenges to successfully incorporating scientific programming into a hydrology course or curriculum, such as meeting disciplinary outcomes alongside teaching students to code, equity issues with access to computing power, and effective classroom management. While these challenges were exacerbated by the global pandemic, shifting to online and hybrid learning formats provided an opportunity to explore and re-evaluate the way we facilitated our hydrology courses and integrated coding exercises and learning. In this article, we reflect on these experiences in three very different hydrology courses (e.g., courses housed in geoscience/engineering, environmental science, and biology programs) with an eye toward identifying successes and opportunities for improvement. We explore this by presenting ten best management practices (BMPs), representing a series of recommendations we have for teaching a virtual, hybrid, or in-person hydrology course that incorporates coding. While all recommendations provided can be applied to many programming languages, the focus of the paper (given the expertise of the authors) is on R. Our BMPs focus on technological facilitation, managing the virtual classroom, and instructional resources, with lessons learned that are applicable to in-person instruction. We also summarize the ways that the authors of this article integrate coding into our coursework to serve as a framework for prepping new courses or those revising existing hydrologic coursework. Above all, we hope these series of recommendations will evolve as hydrology courses continue to emphasize computational skills alongside disciplinary learning. Funding was provided by Lafayette College and a Syracuse University CUSE Grant to CK. Published version

Published
2022

38. The physical challenges of early breastfeeding

Author

Kelleher, Christa M.

Subjects
Breast feeding -- Health aspects, Breast feeding -- Surveys, Mothers -- Physiological aspects, Mothers -- Surveys, Health, Social sciences
Abstract

Breastfeeding rates have recently increased in the United States and Canada and a majority of women now initiate breastfeeding. Feminist scholarship on breastfeeding has addressed a variety of issues related to women's breastfeeding experiences but has tended to ignore or downplay the potentially physically challenging aspects of early breastfeeding. This study, based on semi-structured, in-depth interviews with 52 women from Canada and the United States conducted at approximately one month postpartum, examines women's experiences of pain and discomfort associated with breastfeeding. The findings demonstrate that many women experienced pain and discomfort and that they were generally surprised by the extent, intensity and duration of discomfort and pain, which ranged from mild to severe. Several women indicated that the physical impact of breastfeeding affected their relationship with their baby; others indicated that they became hesitant to continue the practice due to feelings of physical vulnerability, pain and/or discomfort. Lastly, women's experiences of the physical implications of breastfeeding were influenced in part by assistance provided by health care practitioners, in both positive and negative ways. The practice of breastfeeding has the potential to challenge women's physicality. Feminist scholars addressing the topic of breastfeeding, women's postpartum health, and embodiment must more directly and comprehensively account for the potentially negative physical implications and demands associated with early breastfeeding. Keywords: Breasffeeding; Mothers experience; Postpartum health; Canada; Feminism; Embodiment

Published
2006

43. Where Is the Bottom of a Watershed?

Author

Condon, Laura E., primary, Markovich, Katherine H., additional, Kelleher, Christa A., additional, McDonnell, Jeffrey J., additional, Ferguson, Grant, additional, and McIntosh, Jennifer C., additional

Published
2020
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46. Exploring Tracer Information and Model Framework Trade‐Offs to Improve Estimation of Stream Transient Storage Processes

Author

Kelleher, Christa, primary, Ward, Adam, additional, Knapp, J. L. A., additional, Blaen, P. J., additional, Kurz, M. J., additional, Drummond, J. D., additional, Zarnetske, J. P., additional, Hannah, D. M., additional, Mendoza‐Lera, C., additional, Schmadel, N. M., additional, Datry, T., additional, Lewandowski, J., additional, Milner, A. M., additional, and Krause, S., additional

Published
2019
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