Groundwater tracing in the epikarst

Aley, Thomas

doi:10.1201/9781003078128-26

Cited by 5 publications

(5 citation statements)

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“…These tests typically work well in karst aquifers with conduit flow and fast travel times. The techniques for water-tracing studies are described by Alexander and Quinlan (1996), Aley (2019), Kass (1998), and. Monitoring for the tracers is usually qualitative using passive detectors of activated carbon (dye traps or "bugs") or quantitative by measuring the fluorescence of dye in water samples collected over time.…”

Section: Methods Of Data Collection and Analysismentioning

confidence: 99%

Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia

Kozar,

Doctor,

Jones

et al. 2023

Scientific Investigations Report

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and past and present members of the Monroe County Commission-especially Donald J. Evans the Monroe County Clerk and Clyde Gum, County Commissioner of Monroe County-for their assistance in providing support to bring this study to fruition. Harold "Rocky" Parsons and Howard "Howdy" Henritz are also acknowledged for assisting with field reconnaissance of study sites and sampling of the sites for the dye-tracer tests discussed in this report, while providing communication with local landowners to access property for data collection activities for this investigation. Rocky and Howdy devoted countless hours of their time voluntarily supporting the USGS in this study, and the USGS thanks them for their assistance. Finally, the USGS would like to acknowledge the residents of Monroe County who allowed access to their wells, for water-level measurements, and land, for dye-tracer tests, geologic mapping, and base-flow stream surveys.

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Section: Methods Of Data Collection and Analysismentioning

confidence: 99%

Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia

Kozar,

Doctor,

Jones

et al. 2023

Scientific Investigations Report

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“…Groundwater flow velocity is estimated to be orders of magnitude higher in fractured media compared to granular media based on aquifer settings like sand (0.1 to 1 m/day), sand and gravel (0.1 to 10 m/day), fractured rock (1 to 100 m/day) and Karst (1 to 500 m/day) [62,63]. The estimated groundwater flow velocity results in the current work are in agreement with the high groundwater flow velocity magnitude in fractured aquifers and low-velocity magnitude in intergranular and alluvial sediments.…”

Section: Geospatial Technique In Groundwater Flow Velocity Estimationmentioning

confidence: 99%

Estimating Groundwater Flow Velocity in Shallow Volcanic Aquifers of the Ethiopian Highlands Using a Geospatial Technique

Shube,

Kebede,

Azagegn

et al. 2023

Sustainability

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The shallow volcanic aquifer is the major rural water supply source in the Ethiopian highlands. A significant number of hand pump wells in these aquifers experience a rapid decline in yield and poor performance within a short period of time after construction. Hence, reliable estimation of groundwater flow velocity is important to understand groundwater flow dynamics, aquifer responses to stresses and to optimize the sustainable management of groundwater resources. Here, we propose the geospatial technique using four essential input raster maps (groundwater elevation head, transmissivity, effective porosity and saturated thickness) to investigate groundwater flow velocity magnitude and direction in the shallow volcanic aquifers of the Ethiopian highlands. The results indicated that the high groundwater flow velocity in the Mecha site, ranging up to 47 m/day, was observed in the fractured scoraceous basalts. The Ejere site showed groundwater flow velocity not exceeding 7 m/day in the fractured basaltic aquifer and alluvial deposits. In the Sodo site, the groundwater flow velocity was observed to exceed 22 m/day in the fractured basaltic and rhyolitic aquifers affected by geological structures. The Abeshege site has a higher groundwater flow velocity of up to 195 m/day in the highly weathered and fractured basaltic aquifer. In all study sites, aquifers with less fractured basalt, trachyte, rhyolite, welded pyroclastic, and lacustrine deposits exhibited lower groundwater flow velocity values. The groundwater flow velocity directions in all study sites are similar to the groundwater elevation head, which signifies the local and regional groundwater flow directions. This work can be helpful in shallow groundwater resource development and management for rural water supply.

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“…Of the eight fluorescent dyes, the five most useful are: Eosin (Eos), Uranine (Sodium Fluorescein) (Fl), Pyranine (Py), Rhodamine WT (RWT), and Sulforhodamine B (SRB), because all of these dyes are anionic compounds and thus, less subject to adsorption onto clays and similar materials than cationic dyes (Aley, 2002). Each of these five dyes has distinct characteristics and wavelength (for example, color) and are safe at low concentrations, but some may be better suited to one environment or another.…”

Section: Water Tracing Testsmentioning

confidence: 99%

“…For readers that are interested in learning more about conducting tracing tests in karst, the following references are suggested: Behrens, 1986;Mull and others, 1988a;Aley, 1997Aley, , 2001Aley, and 2002Behrens and others, 2001;Field, 2002 andWorthington and Smart, 2003;and Goldscheider and others, 2008. A partial list of investigative reports that discuss applications of tracer testing include: Mull and others, 1988b;Mull, 1993a and1993b;Bayless and others, 1994;Robinson, 1995;Pavlicek, 1996;Taylor, 1997;Kidd and others, 2001;Spangler and Susong, 2006;Kozar and others, 2007;Long and others, 2012;Spangler, 2012;Gouzie and others, 2014; and Kuniansky and others, 2019.…”

Section: Water Tracing Testsmentioning

confidence: 99%

“…Figure 53 -A graph of an activated carbon sampler elutant containing fluorescence peaks from pyranine, fluorescein, eosine, and rhodamine WT from a groundwater tracing study in British Columbia, Canada, fromAley (2002). A spectrofluorophotometer graph is a plot of wavelength on the x-axis and relative excitation fluorescence on the y-axis for one sample from a given time thus it identifies substances in the elutant.…”

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confidence: 99%

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