Seasonal Differences in the Attenuation of Polar Trace Organics in the Hyporheic Zone of an Urban Stream

2022 ◽  
Author(s):  
Birgit M. Mueller ◽  
Hanna Schulz ◽  
Anja Höhne ◽  
Anke Putschew ◽  
Joerg Lewandowski
Keyword(s):  
Hyporheic Zone ◽  
Urban Stream ◽  
Seasonal Differences ◽  
Trace Organics

scholarly journals Invertebrate and Microbial Response to Hyporheic Restoration of an Urban Stream

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 481
Author(s):  
Sarah A. Morley ◽  
Linda D. Rhodes ◽  
Anne E. Baxter ◽  
Giles W. Goetz ◽  
Abigail H. Wells ◽  
...  
Keyword(s):  
Hyporheic Zone ◽  
Habitat Diversity ◽  
Urban Stream ◽  
Floodplain Restoration ◽  
Design Elements ◽  
Biological Communities ◽  
Taxa Richness ◽  
Restoration Technique ◽  
Microbial Response ◽  
Face Complex

All cities face complex challenges managing urban stormwater while also protecting urban water bodies. Green stormwater infrastructure and process-based restoration offer alternative strategies that prioritize watershed connectivity. We report on a new urban floodplain restoration technique being tested in the City of Seattle, USA: an engineered hyporheic zone. The hyporheic zone has long been an overlooked component in floodplain restoration. Yet this subsurface area offers enormous potential for stormwater amelioration and is a critical component of healthy streams. From 2014 to 2017, we measured hyporheic temperature, nutrients, and microbial and invertebrate communities at three paired stream reaches with and without hyporheic restoration. At two of the three pairs, water temperature was significantly lower at the restored reach, while dissolved organic carbon and microbial metabolism were higher. Hyporheic invertebrate density and taxa richness were significantly higher across all three restored reaches. These are some of the first quantified responses of hyporheic biological communities to restoration. Our results complement earlier reports of enhanced hydrologic and chemical functioning of the engineered hyporheic zone. Together, this research demonstrates that incorporation of hyporheic design elements in floodplain restoration can enhance temperature moderation, habitat diversity, contaminant filtration, and the biological health of urban streams.

scholarly journals Lateral and longitudinal chloride dynamics in an urbanizing watershed in Southern Ontario: a spatial cross-correlation modelling approach

2021 ◽  
Author(s):  
Bhaswati Mazumder
Keyword(s):  
Time Series ◽  
Cross Correlation ◽  
Hyporheic Zone ◽  
Time Series Data ◽  
Urban Stream ◽  
Series Data ◽  
Catchment Scale ◽  
Southern Ontario ◽  
Urbanizing Watershed ◽  
Correlation Modelling

The application of spatial cross-correlation modelling was tested on continuous time series of electrical conductivity to estimate lateral and longitudinal chloride dynamics in an urbanizing watershed in Southern Ontario. Overall, the model appeared more robust for the winter salting season than for the summer growing season. The winter results showed shorter travel times with higher velocity longitudinally (upstream to downstream) in an urban stream reach with more impervious surfaces than in a rural reach with more permeable surfaces. The lateral exchange rates (stream-hyporheic zone) were observed to be affected by both local and catchment-scale land use and soil profiles. Cross-correlation results and time series data also indicated that road-salt applications in the urban catchment may be leading to underground storage of chloride, contributing to the streams in summer and producing year-round peaks of chloride in the urban stream reach.

scholarly journals Limitations on the role of the hyporheic zone in chromium natural attenuation in a contaminated urban stream

2017 ◽  
Vol 83 ◽  
pp. 108-120 ◽  
Author(s):  
Barbara Palumbo-Roe ◽  
Vanessa J. Banks ◽  
Helen C. Bonsor ◽  
Elliott M. Hamilton ◽  
Michael J. Watts
Keyword(s):  
Natural Attenuation ◽  
Hyporheic Zone ◽  
Urban Stream

scholarly journals Using Concentration–Discharge Relationships to Identify Influences on Surface and Subsurface Water Chemistry along a Watershed Urbanization Gradient

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 662
Author(s):  
Jessica A. Balerna ◽  
Jacob C. Melone ◽  
Karen L. Knee
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Hyporheic Zone ◽  
Specific Conductance ◽  
The Other ◽  
Subsurface Water ◽  
Urban Stream ◽  
Dissolved Metals ◽  
Urbanization Gradient ◽  
Urbanized Streams

Urban development within watersheds impacts the hydrology and water quality of streams, but changes to groundwater–surface water interactions in this “urban stream syndrome” are not yet well understood. This study focused on three stream systems in a northern Virginia (USA) protected area with 14.2, 31.7, and 66.1% developed land in their watersheds. Surface water was sampled weekly for nutrients, dissolved metals, sulfate, ancillary water quality parameters, and discharge over two non-consecutive years with the hyporheic zone sampled during the second year. Concentration–discharge relationships revealed largely chemostatic behavior in surface water solutes in the least urbanized stream, while in the two more urbanized streams, these relationships tended to have significant positive and negative slopes, indicating diverse delivery pathways depending on the constituent. In the least urbanized stream, linear regressions between discharge and solute concentrations in hyporheic water had exclusively negative slopes, indicating source-limited delivery, while the other two urbanized streams maintained largely chemostatic behavior. Average specific conductance and nitrate + nitrite concentrations in stream surface water reflected an urbanization gradient, while sulfate, Ca, K and Sr concentrations suggested a threshold effect: the stream with a mostly forested watershed had the lowest concentrations, while the other two were higher and similar. Specific conductance indicated salinization of both surface and groundwater at the two more urban streams, possibly threatening aquatic organisms. Metal concentrations in surface and subsurface water were often positively correlated with specific conductance and negatively correlated with pH, suggesting that they may originate from road salt and/or be mobilized by acid precipitation. These results indicate the importance of monitoring both baseflow and stormflow as pathways for pollution.

Hyporheic zone flow disruption from channel linings: Implications for the hydrology and geochemistry of an urban stream, St. Louis, Missouri, USA

2016 ◽  
Vol 27 (1) ◽  
pp. 98-109 ◽  
Author(s):  
Elizabeth A. Hasenmueller ◽  
Heather K. Robinson
Keyword(s):  
Hyporheic Zone ◽  
Urban Stream ◽  
Flow Disruption

scholarly journals Lateral and longitudinal chloride dynamics in an urbanizing watershed in Southern Ontario: a spatial cross-correlation modelling approach

2021 ◽  
Author(s):  
Bhaswati Mazumder
Keyword(s):  
Time Series ◽  
Cross Correlation ◽  
Hyporheic Zone ◽  
Time Series Data ◽  
Urban Stream ◽  
Series Data ◽  
Catchment Scale ◽  
Southern Ontario ◽  
Urbanizing Watershed ◽  
Correlation Modelling

The application of spatial cross-correlation modelling was tested on continuous time series of electrical conductivity to estimate lateral and longitudinal chloride dynamics in an urbanizing watershed in Southern Ontario. Overall, the model appeared more robust for the winter salting season than for the summer growing season. The winter results showed shorter travel times with higher velocity longitudinally (upstream to downstream) in an urban stream reach with more impervious surfaces than in a rural reach with more permeable surfaces. The lateral exchange rates (stream-hyporheic zone) were observed to be affected by both local and catchment-scale land use and soil profiles. Cross-correlation results and time series data also indicated that road-salt applications in the urban catchment may be leading to underground storage of chloride, contributing to the streams in summer and producing year-round peaks of chloride in the urban stream reach.

scholarly journals Simultaneous attenuation of trace organics and change in organic matter composition in the hyporheic zone of urban streams

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Birgit M. Mueller ◽  
Hanna Schulz ◽  
Robert E. Danczak ◽  
Anke Putschew ◽  
Joerg Lewandowski
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Molecular Diversity ◽  
Hyporheic Zone ◽  
Transformation Product ◽  
Treated Wastewater ◽  
Hyporheic Exchange ◽  
Urban Stream ◽  
Strong Correlations ◽  
High Attenuation

AbstractTrace organic compounds (TrOCs) enter rivers with discharge of treated wastewater. These effluents can contain high loads of dissolved organic matter (DOM). In a 48 h field study, we investigated changes in molecular composition of seven DOM compound classes (FTICR-MS) and attenuation of 17 polar TrOCs in a small urban stream receiving treated wastewater. Correlations between TrOCs and DOM were used to identify simultaneous changes in surface water and the hyporheic zone. Changes in TrOC concentrations in surface water ranged between a decrease of 29.2% for methylbenzotriazole and an increase of 152.2% for the transformation product gabapentin-lactam. In the hyporheic zone, only decreasing TrOC concentrations were observed, ranging from 4.9% for primidone to 93.8% for venlafaxine . TrOC attenuation coincided with a decline of molecular diversity of easily biodegradable DOM compound classes while molecular diversity of poorly biodegradable DOM compound classes increased. This concurrence indicates similar or linked attenuation pathways for biodegradable DOM and TrOCs. Strong correlations between TrOCs and DOM compound classes as well as high attenuation of TrOCs primarily occurred in the hyporheic zone. This suggests high potential for DOM turnover and TrOC mitigation in rivers if hyporheic exchange is sufficient.

Seasonal differences in airway hyperresponsiveness in asthmatic patients: relationship with allergen exposure and sensitization to house dust mites

1997 ◽  
Vol 27 (6) ◽  
pp. 627-633 ◽  
Author(s):  
S. VAN DER HEIDE ◽  
J. G. R. DE MONCHY ◽  
K. DE VRIES ◽  
A. E. J. DUBOIS ◽  
H. F. KAUFFMAN
Keyword(s):  
House Dust ◽  
Airway Hyperresponsiveness ◽  
Allergen Exposure ◽  
House Dust Mites ◽  
Dust Mites ◽  
Seasonal Differences ◽  
Asthmatic Patients
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