A new method for mapping variability in vertical seepage flux in streambeds

Xun-Hong Chen, Jinxi Song, Cheng Cheng, Deming Wang, Susan O. Lackey

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A two-step approach was used to measure the flux across the water-sediment interface in river channels. A hollow tube was pressed into the streambed and an in situ sediment column of the streambed was created inside the tube. The hydraulic gradient between the two ends of the sediment column was measured. The vertical hydraulic conductivity of the sediment column was determined using a falling-head permeameter test in the river. Given the availability of the hydraulic gradient and vertical hydraulic conductivity of the streambed, Darcy's law was used to calculate the specific discharge. This approach was applied to the Elkhorn River and one tributary in northeastern Nebraska, USA. The results suggest that the magnitude of the vertical flux varied greatly within a short distance. Furthermore, the flux can change direction from downward to upward between two locations only several meters apart. This spatial pattern of variation probably represents the inflow and outflow within the hyporheic zone, not the regional ambient flow systems. In this study, a thermal infrared camera was also used to detect the discharge locations of groundwater in the streambed. After the hydraulic gradient and the vertical hydraulic conductivity were estimated from the groundwater spring, the discharge rate was calculated.

Original languageEnglish (US)
Pages (from-to)519-525
Number of pages7
JournalHydrogeology Journal
Volume17
Issue number3
DOIs
StatePublished - May 21 2009

Fingerprint

seepage
hydraulic conductivity
hydraulics
sediment
hyporheic zone
permeameter
Darcy law
groundwater
sediment-water interface
river channel
river
tributary
inflow
outflow
method
rate
in situ
test

Keywords

  • Equipment/field techniques
  • Groundwater/surface-water relations
  • Hyporheic zone
  • Infrared camera
  • USA

ASJC Scopus subject areas

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

A new method for mapping variability in vertical seepage flux in streambeds. / Chen, Xun-Hong; Song, Jinxi; Cheng, Cheng; Wang, Deming; Lackey, Susan O.

In: Hydrogeology Journal, Vol. 17, No. 3, 21.05.2009, p. 519-525.

Research output: Contribution to journalArticle

Chen, X-H, Song, J, Cheng, C, Wang, D & Lackey, SO 2009, 'A new method for mapping variability in vertical seepage flux in streambeds', Hydrogeology Journal, vol. 17, no. 3, pp. 519-525. https://doi.org/10.1007/s10040-008-0384-0
Chen, Xun-Hong ; Song, Jinxi ; Cheng, Cheng ; Wang, Deming ; Lackey, Susan O. / A new method for mapping variability in vertical seepage flux in streambeds. In: Hydrogeology Journal. 2009 ; Vol. 17, No. 3. pp. 519-525.
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