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Identifying Groundwater Discharge Dynamics into Stream Habitat Assessments

Author(s): Danielle Hare

University of Connecticut

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Summary:
Groundwater contributions are overlooked in many habitat assessments, even though their ecological and water quality importance to streams has been broadly recognized. This lab encourages students to engage with a stream reach, consider how…

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Groundwater contributions are overlooked in many habitat assessments, even though their ecological and water quality importance to streams has been broadly recognized. This lab encourages students to engage with a stream reach, consider how groundwater contributes to the study reach, and use methods to identify groundwater connectivity. We build on the concepts of EPA habitat assessment (Chapter 5) and ask students how human activities across the landscape may influence these stream ecosystems to explore policy improvements and additional considerations.

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Version 1.0 - published on 06 Jan 2023 doi:10.25334/C3HR-C456 - cite this

Description

Groundwater’s ecological relevance in streams and rivers is often thought of in three central ways: hydrologically (Brunke and Gonser, 1997), thermally (e.g. Sullivan et al., 2021) or chemically (e.g. Brookfield et al., 2021). Due to climatic and landscape changes, these relationships can be impaired and even become negative. As we explore the site, the students will be asked to consider this context and elaborate on potential scenarios that may influence how patchy groundwater discharge habitats, as well as stream ecosystems, may be disrupted through changes to the groundwater-surface water connection.

Overall, the goal of these lessons is to promote the inclusion of groundwater-dependent stream habitats into the river practitioner's toolbox, prompt discussion into positive, negative, and dynamic effects of groundwater contribution to the stream, and encourage discussion as to how better to include groundwater into the stream habitat assessment process.

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