Hyporheic exchange flows induced by constructed riffles and steps in lowland streams in southern Ontario, Canada

2006 ◽  
Vol 20 (20) ◽  
pp. 4287-4305 ◽  
Author(s):  
Tamao Kasahara ◽  
Alan R. Hill
Keyword(s):  
Hyporheic Exchange ◽  
Southern Ontario ◽  
Lowland Streams ◽  
Exchange Flows

Effects of riffle–step restoration on hyporheic zone chemistry in N-rich lowland streams

2006 ◽  
Vol 63 (1) ◽  
pp. 120-133 ◽  
Author(s):  
Tamao Kasahara ◽  
Alan R Hill
Keyword(s):  
Urban Areas ◽  
Hyporheic Zone ◽  
Stream Water ◽  
Ion Concentration ◽  
Hyporheic Exchange ◽  
Ecosystem Functions ◽  
Exchange Flow ◽  
Nutrient Inputs ◽  
Lowland Streams ◽  
Hyporheic Zones

Stream restoration projects that aim to rehabilitate ecosystem health have not considered surface–subsurface linkages, although stream water and groundwater interaction has an important role in sustaining stream ecosystem functions. The present study examined the effect of constructed riffles and a step on hyporheic exchange flow and chemistry in restored reaches of several N-rich agricultural and urban streams in southern Ontario. Hydrometric data collected from a network of piezometers and conservative tracer releases indicated that the constructed riffles and steps were effective in inducing hyporheic exchange. However, despite the use of cobbles and boulders in the riffle construction, high stream dissolved oxygen (DO) concentrations were depleted rapidly with depth into the hyporheic zones. Differences between observed and predicted nitrate concentrations based on conservative ion concentration patterns indicated that these hyporheic zones were also nitrate sinks. Zones of low hydraulic conductivity and the occurrence of interstitial fines in the restored cobble-boulder layers suggest that siltation and clogging of the streambed may reduce the downwelling of oxygen- and nitrate-rich stream water. Increases in streambed DO levels and enhancement of habitat for hyporheic fauna that result from riffle–step construction projects may only be temporary in streams that receive increased sediment and nutrient inputs from urban areas and croplands.

scholarly journals Toward a conceptual framework of hyporheic exchange across spatial scales

2018 ◽  
Author(s):  
Chiara Magliozzi ◽  
Robert Grabowski ◽  
Aaron I. Packman ◽  
Stefan Krause
Keyword(s):  
Conceptual Framework ◽  
Hyporheic Zone ◽  
Spatial Scales ◽  
Temporal Variations ◽  
Hyporheic Exchange ◽  
Catchment Management ◽  
Spatial And Temporal Scales ◽  
Exchange Flows ◽  
Modelling Studies ◽  
And Control

Abstract. Rivers are not isolated systems but interact continuously with groundwater from their confined headwaters to their wide lowland floodplains. In the last few decades, research on the hyporheic zone (HZ) has increased appreciation of the hydrological importance and ecological significance of connected river and groundwater systems. While recent studies have investigated hydrological, biogeochemical and ecohydrological processes in the HZ at bedform and reach scales, a comprehensive understanding of process-based interactions between factors operating at different spatial and temporal scales driving hyporheic exchange flows (HEF) at large and reach scale is still missing. Therefore, this review summarizes the factors and processes at catchment, valley and reach scales that interact and control spatial and temporal variations in hyporheic exchange flows. By using a multi-scale perspective, this review connects field observations and modelling studies to identify process driving patterns and dynamics of HEF. Finally, the influence of process interactions over multiple spatial scales is illustrated in a case study, supported by new GIS analyses, which highlights the importance of valley scale factors to the expression of HEF at the reach scale. This conceptual framework will aid the development of approaches to interpret hyporheic exchange across scales, infer scaling relationships, and inform catchment management decisions.

New Insights on Scale-dependent Surface-Groundwater Exchange from a Floating Self-potential Dipole

2018 ◽  
Vol 23 (2) ◽  
pp. 261-287
Author(s):  
Scott J. Ikard ◽  
Andrew P. Teeple ◽  
Jason D. Payne ◽  
Gregory P. Stanton ◽  
J. Ryan Banta
Keyword(s):  
Surface Water ◽  
Flow Patterns ◽  
Hyporheic Exchange ◽  
Two Dimensional ◽  
Exchange Flows ◽  
Guadalupe River ◽  
Groundwater Exchange ◽  
Self Potential ◽  
Ambient Groundwater ◽  
Water Borne

In south-central Texas the lower Guadalupe River has incised into the outcrop of the Carrizo-Wilcox aquifer. The river and the aquifer are hydraulically connected across the outcrop, although the connectivity is obscured at the surface by alluvium and surface-water and groundwater exchange dynamics are currently poorly understood. To investigate surface-water and groundwater exchange dynamics between the lower Guadalupe River and the Carrizo-Wilcox aquifer, a geophysical study was completed along a 14.86 km reach of the river by using water-borne gradient self-potential (SP) profiling and two-dimensional direct-current electric resistivity tomography. This paper explores the applicability of these water-borne geoelectric methods in delineating gaining and losing channel reaches, and demonstrates that geoelectric signals in the form of total electric field strength can be logged with an electric dipole and decomposed into component SP signals depicting regional and local groundwater flow patterns attributable to regional and localized hydraulic gradients. Localized SP anomalies of several tens of millivolts, indicative of hyporheic exchange flows, are observed and superimposed upon a 124 mV regional SP anomaly indicative of ambient groundwater exchange flows between the river and the aquifer. The observed SP signals are interpreted through two-dimensional finite-element modeling of streaming potentials attributable to ambient groundwater exchange and hyporheic exchange flow patterns. Variables of the channel environment such as temperature and concentration gradients, depth, and velocity are considered and subsequently eliminated as alternative sources of the SP signals that are presented.

scholarly journals Supplementary material to "Scaling down hyporheic exchange flows: from catchments to reaches"

2017 ◽  
Author(s):  
Chiara Magliozzi ◽  
Robert Grabowski ◽  
Aaron I. Packman ◽  
Stefan Krause
Keyword(s):  
Hyporheic Exchange ◽  
Exchange Flows ◽  
Supplementary Material ◽  
Scaling Down

scholarly journals ANALYSIS OF THE INFLUENCE OF FERRICRETE ON HYPORHEIC EXCHANGE FLOWS

2020 ◽  
Author(s):  
Ariel Rickel ◽  
◽  
Beth Hoagland ◽  
Alexis K. Navarre-Sitchler ◽  
Kamini Singha
Keyword(s):  
Hyporheic Exchange ◽  
Exchange Flows
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