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  • Earon, RobertKTH,Vatten- och miljöteknik (author)

Insight into the influence of local streambed heterogeneity on hyporheic-zone flow characteristics

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-10-02
  • Springer Science and Business Media Deutschland GmbH,2020
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-287163
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287163URI
  • https://doi.org/10.1007/s10040-020-02244-5DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20240110
  • Interaction between surface water and groundwater plays a fundamental role in influencing aquatic chemistry, where hyporheic exchange processes, distribution of flow paths and residence times within the hyporheic zone will influence the transport of mass and energy in the surface-water/groundwater system. Geomorphological conditions greatly influence hyporheic exchange, and heterogeneities such as rocks and clay lenses will be a key factor for delineating the hyporheic zone. Electrical resistivity tomography (ERT) and ground-penetrating radar (GPR) were used to investigate the streambed along a 6.3-m-long reach in order to characterise geological layering and distinct features which may influence parameters such as hydraulic conductivity. Time-lapse ERT measurements taken during a tracer injection demonstrated that geological features at the meter-scale played a determining role for the hyporheic flow field. The penetration depth of the tracer into the streambed sediment displayed a variable spatial pattern in areas where the presence of highly resistive anomalies was detected. In areas with more homogeneous sediments, the penetration depth was much more uniformly distributed than observed in more heterogeneous sections, demonstrating that ERT can play a vital role in identifying critical hydraulic features that may influence hyporheic exchange processes. Reciprocal ERT measurements linked variability and thus uncertainty in the modelled resistivity to the spatial locations, which also demonstrated larger variability in the tracer penetration depth, likely due to local heterogeneity in the hydraulic conductivity field.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Riml, Joakim,1979-KTH,Resurser, energi och infrastruktur(Swepub:kth)u1265deb (author)
  • Wu, Liwen (author)
  • Olofsson, BoKTH,Vatten- och miljöteknik(Swepub:kth)u1ehx108 (author)
  • KTHVatten- och miljöteknik (creator_code:org_t)

Related titles

  • In:Hydrogeology Journal: Springer Science and Business Media Deutschland GmbH28:8, s. 2697-27121431-21741435-0157

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Earon, Robert
Riml, Joakim, 19 ...
Wu, Liwen
Olofsson, Bo
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NATURAL SCIENCES
NATURAL SCIENCES
and Earth and Relate ...
and Oceanography Hyd ...
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Hydrogeology Jou ...
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Royal Institute of Technology

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