Subsurface Hydrology Pore Scale Variation in Retardation Factor as a Cause of Nonideal Reactive Breakthrough Curves: 1. Conceptual Model and its Evaluation
Journal of Hydrology ELSEVIER  Journal of Hydrology 172 (1995) 171-184 ... study and a relatively steep hydraulic gradient of 0.055. Rain caused dilution and mixing of ... that chloride has a retardation factor of 1.5-1.6 for poorly decomposed peat in a laboratory column. Hoag and Price (1995) found that a retardation factor as
On the Physical Meaning of Retardation Factor and Velocity of a Nonlinearly Sorbing Solute Article (PDF Available) in Journal of Hydrology 302(1-4):127-136 · February 2005 with 337 Reads
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Journal description. The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of groundwater.
This study investigated the variation of retardation factor and velocity of a lithium (a nonlinearly sorbing solute) plume in relation to the variation of lithium concentration in the plume by using field-measured breakthrough curves (BTCs).
Differences in radionuclide transport and retardation in fracture columns were explained on the basis of rock structure. P. HOltt8 et al. / Journal of Contaminant Hydrology 26 (1997) 135-145 145 Acknowledgements This study is part of the publicly financed nuclear waste management research program in Finland.
For water resources information please visit our Oregon Water Science Center Home Page or Oregon Water Science Center Hydrologic Studies Page.. The definitions found in this glossary are from, "The Federal Glossary of Selected Terms: Subsurface-Water Flow and Solute Transport": Department of Interior, U.S. Geological Survey, Office of Water Data Coordination, August 1989.
Definition of retardation factor: The ratio of the average linear velocity of ground water to the velocity of the retarded constituent at C/Co=0.5 .
the common non-reactive ﬂow and transport parameters, the sorption parameters (retardation factor, sorption coefﬁcient, and kinetic rate constant) of each model are estimated using the breakthrough data of reactive tracers, neptunium and uranium, respectively. Based on the inverse modeling results, the
The purpose of this chapter is to review and comment on the state of the U.S. Department of Energy's (DOE's) understanding of hydrology in formations at the WIPP site above the Salado.
Hydrology ELSEVIER Journal of Hydrology 158 (1994) 305-317 [21 ... bromide and uranin, through sand. Similarly to Handy's study, no effect of solute size was observed. However, in both cases the pore-water velocities ... (p/OTKp)) is the retardation factor, Kp is the equilibrium sorption constant (L 3 M- …
The center of mass appears to move more slowly, and solute spreading is enhanced in the variable retardation case. At late times, when the travel distance is much larger than the correlation scale of the retardation factor, the zeroth moment for the variable retardation …
Hydrology, Cryosphere and Earth Surface. Cryosphere; Hydrology; ... isotropic retardation factor. The degree of nonuniformity and anisotropy in the retardation factor is controlled largely by the difference in the mean apertures of each fracture set, the standard deviation in fracture aperture, and the orientation of the fracture sets relative ...
the retardation factor of the reactive tracer at the whole-catchment scale. In this paper, we add chemical retardation to the downslope transport model of Kirchner et al. (2001), examining how the scaling behavior and travel-time distribution of a reactive tracer (Na) differ from those of a passive tracer (Cl). We determine the whole-catchment
Journal of Environmental Hydrology 3 Volume 19 Paper 20 September 2011 Bioremediation Modeling Saady but both returned to work as drains later. The site is located at the southwestern corner of 2700 Km 2 catchment area which feeds Dyala River mainly and Tigris River ultimately.
Retardation factor. In chromatography, the retardation factor (R) is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor R f is defined as the ratio of the distance traveled by the center of …
Closed-form analytical expressions for the velocity and retardation factor of nonlinearly sorbing reactive solutes (Vereecken et al. 2002) also show power law behaviour with time. Retardation factor of such a solute depends on its concentration, which, in turn, depends on travel path and travel time of …
Journal of Environmental Hydrology 2 Volume 7 Paper 10 August 1999 Reducing Groundwater Contamination at a Landfill, Korea Kim, Shim, Shon, Lee, and Koo INTRODUCTION The study of groundwater flow and pollutant transport around waste landfill sites has been actively executed in …
The movement of groundwater underneath us is influenced by several factors. In this video lesson, you will learn what these factors are and how they affect how and where groundwater moves. 2013-11-13
In chromatography , the retardation factor ( R ) is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor R is defined as the ratio of the distance traveled by the center of a spot to the distance traveled by the solvent front.