EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/23/2019 | 3:00 PM - 3:15 PM | EFFECTS OF INTERACTIONS BETWEEN LAND USE AND STREAM GEOMORPHIC FEATURES ON NUTRIENT LOADINGS | 151 DEF
EFFECTS OF INTERACTIONS BETWEEN LAND USE AND STREAM GEOMORPHIC FEATURES ON NUTRIENT LOADINGS
Changes in land-use have resulted in substantial loss of stream water quality. The objective of this study was to explore associations between nutrient loading, land use, and stream fluvial geomorphology across several land-use types in Ohio. We surveyed 26 stream reaches across three study catchments (agricultural, mixed-use, and forested) in southern Ohio. Sampling occurred seasonally in 2016-2017 for nutrient concentrations, in-stream habitat quality, and hydrogeomorphic parameters. Stream reach morphology, nutrient concentrations, and nutrient loadings all varied by catchment. Interactions between land use and stream geomorphic features were significantly associated with nutrient loadings. Total phosphorus, total nitrogen, and orthophosphate loadings decreased in the forested catchment, but increased in the mixed-use and agricultural catchments, as median grain size and substrate stability increased. Total nitrogen and nitrate loadings decreased in the forested catchment, but increased in the mixed-use and agricultural catchments, as stream bed relative roughness and riffle habitat increased. Our results suggest that some fluvial geomorphic features may aid in regulating nutrient dynamics, highlighting the potential role of stream restoration in reducing stream-nutrient loading.
- Geomorphology
- Nitrogen
- Phosphorous
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Presenters/Authors
Kay C. Stefanik
(), The Ohio State University, stefanik.13@osu.edu;
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S. Mažeika Patricio Sulliván
(), The Ohio State University, sullivan.191@osu.edu;
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