The effect of unsteady streamflow and stream-groundwater interactions on oxygen consumption in a sandy streambed

Scientific Reports, Год журнала: 2019, Номер 9(1)

Опубликована: Дек. 24, 2019

Streamflow dynamics are often ignored when studying biogeochemical processes in the hyporheic zone. We explored interactive effects of unsteady streamflow and groundwater fluxes on delivery consumption oxygen within zone using a recirculating flume packed with natural sandy sediments. The was equipped programmable control drainage system that used to impose losing gaining fluxes. Tracer tests were measure exchange flux planar optode subsurface concentration patterns. It found volume oxic decreased declined, drastically conditions applied. also led slight increase average zone, compared under steady streamflow. However, rates significantly higher all exception highest flux. present study provides first insight into interactions between unsteadiness losing/gaining improve understanding their impact microbial metabolism

Язык: Английский

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Depth-dependent variations of physicochemical properties of sedimentary dissolved organic matter and the influence on the elimination of typical pharmaceuticals

The Science of The Total Environment, Год журнала: 2024, Номер 917, С. 170432 - 170432

Опубликована: Янв. 27, 2024

Язык: Английский

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Fate of trace organic compounds in the hyporheic zone: Influence of microbial metabolism

Water Research, Год журнала: 2022, Номер 224, С. 119056 - 119056

Опубликована: Сен. 9, 2022

Язык: Английский

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Removal of Fecal Indicator Bacteria by River Networks

Water, Год журнала: 2022, Номер 14(4), С. 617 - 617

Опубликована: Фев. 17, 2022

Fecal contamination is a significant source of water quality impairment globally. Aquatic ecosystems can provide an important ecosystem service fecal removal. Understanding the processes that regulate removal among river networks across flow conditions critical. We applied network model, Framework for Modeling in Earth System (FrAMES-Ecoli), to quantify indicator bacteria by during summers series New England watersheds different characteristics. FrAMES-Ecoli simulates sources, transport, and riverine Escherichia coli (E. coli). E. was simulated both column hyporheic zone, function hydraulic conditions, exchange rates with die-off each compartment. found that, at scale summers, be high (19–99%) variability controlled hydrologic watershed size, distribution sources watershed. Hydrology controls much variability, 68–99% inputs removed under base 19–85% storm events. Removal alone could not explain observed pattern coli, suggesting such as must considered. These results suggest should taken into consideration managing critical downstream receiving waters.

Язык: Английский

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Temporal and spatial variable in-stream attenuation of selected pharmaceuticals

The Science of The Total Environment, Год журнала: 2020, Номер 741, С. 139514 - 139514

Опубликована: Май 25, 2020

Язык: Английский

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