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Related Experiment Videos

Quantifying urban river-aquifer fluid exchange processes: a multi-scale problem.

Paul A Ellis1, Rae Mackay, Michael O Rivett

  • 1School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, UK.

Journal of Contaminant Hydrology
|December 22, 2006
PubMed
Summary
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Urban groundwater-river interactions were studied using field monitoring and modeling of the Tame River. Riverbed and bank sediment morphology significantly influence the mixing zone, impacting hyporheic zone processes.

Area of Science:

  • Hydrogeology
  • Environmental Science
  • Urban Hydrology

Background:

  • Investigating groundwater-river interactions is crucial for understanding urban water systems.
  • The hyporheic zone, where river and groundwater mix, plays a key role in water quality and contaminant transport.
  • Urban rivers often exhibit complex interactions due to altered hydrology and geology.

Purpose of the Study:

  • To quantify spatial and temporal flow distributions at the aquifer-river interface in an urban setting.
  • To understand the controls on mixing processes within the hyporheic zone of the Tame River.
  • To assess the influence of riverbed and bank morphology on groundwater-river exchange.

Main Methods:

  • Long-term field monitoring of the Tame River and underlying Triassic Sandstone aquifer.

Related Experiment Videos

  • Detailed numerical modeling at various spatial (meter to kilometer) and temporal (hourly to multi-annual) scales.
  • Analysis of fluid exchange, mixing zone thickness, and groundwater flow patterns.

    • Main Results:

    • Multi-scale factors govern fluid exchange, influencing the mixing zone thickness and groundwater flow through the riverbed.
    • Riverbed and bank sediment morphology are key factors in developing the aquifer-river mixing zone.
    • River pressure transients affect flow velocity within the riverbed material.

    Conclusions:

    • The physical characteristics of urban riverbeds and banks significantly shape the hyporheic mixing zone.
    • Areas of intense mixing are not necessarily linked to high groundwater discharge, necessitating further research.
    • Understanding these dynamics is vital for assessing the remedial capacity of the hyporheic zone in urban environments.