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Hydrologic and Biogeochemical Storm Response in Choptank Basin Headwaters

dc.contributor.advisorFisher, Thomas Ren_US
dc.contributor.authorKoskelo, Anttien_US
dc.description.abstractThis study quantified the effect of hydric soils on the hydrology and biogeochemistry of sub-watersheds across the Delmarva Peninsula. For hydrology, long-term data were compiled for 13 United States Geological Survey sites and evaluated for hydric soil effects. Results show that hydric soils reduce baseflow by increasing ponding and subsurface water storage, resulting in greater evapotranspiration. In contrast, hydric soils were unrelated to stormflow, which was instead driven by topography. During hourly sampling of 18 storms in the Choptank Basin, most forms of nitrogen and phosphorus increased in concentration due to erosion and re-suspension of sediments. Nitrate, however, decreased during storms due to dilution of nitrate-rich groundwater by runoff. Baseflow nitrate concentrations decreased with forested hydric soils, likely due to greater denitrification in forested hydric areas. Annually, much of the total nitrogen and phosphorus export occurred during storms, emphasizing the need to sample a wide range of flows to improve estimates of nutrient losses.en_US
dc.format.extent6976882 bytes
dc.titleHydrologic and Biogeochemical Storm Response in Choptank Basin Headwatersen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pquncontrolledhydric soilsen_US
dc.subject.pquncontrolledwatershed ecologyen_US

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