Transport and mass exchange processes in sand and gravel aquifers

field and modelling studies : proceedings of the International Conference and Workshop held in Ottawa, Canada, October 1-4, 1990
  • 4.47 MB
  • English
Atomic Energy of Canada , Chalk River, Ont
Hydrogeology -- Mathematical models -- Congresses., Aquifers -- Mathematical models -- Congre
StatementG. Moltyaner, editor ; conference co-sponsors, AECL Research, Chalk River Laboratories ... [et al.].
ContributionsMoltyaner, Greg., Chalk River Nuclear Laboratories., Atomic Energy of Canada Limited., AECL Research.
The Physical Object
Pagination2 v. :
ID Numbers
Open LibraryOL19438734M
ISBN 100662182375

Transport and Mass Exchange Processes in Sand and Gravel Aquifers: Field and Modelling Studies G. Moltyaner, Editor Proceedings of the International Conference and Workshop held in Ottawa, Canada October 1 - 4, CONFERENCE PROGRAM COMMITTEE Dr. Greg Moltyaner, Chairperson Chalk River Laboratories Dr.

Gedeon Dagan Tel-Aviv University Dr. The results of this study suggest that the isolation distances vary widely ranging from m– km in sand aquifers, m– km in gravel aquifers and – km in coarse gravel.

11/95 Sand And Gravel Processing Sand And Gravel Processing Process Description Deposits of sand and gravel, the unconsolidated granular materials resulting from the natural disintegration of rock or stone, are generally found in near-surface alluvial deposits and in subterranean and subaqueous beds.

The sand and gravel aquifer underlies more than 6, square miles of land surface in southwestern Alabama and the western Florida panhandle. It is the major source of groundwater in Escambia and Santa Rosa counties and is a secondary source in Okaloosa and Walton counties.

As its name implies, it consists largely of interbedded layers of. Effect of adsorbed metal ions on the transport of Zn- and Ni-EDTA complexes in a sand and gravel aquifer.

Geochimica et Cosmochimica Acta66 (17), DOI: /S(02) Jasper by: Conference and Workshop on Transport and Mass Exchange Processes in Sand and Gravel Aquifers, Oct. 1–4,Ottawa, Canada, AECL, Vol. 1, – Google Scholar Tompson, A.F.B. () Numerical simulation of chemical migration in physically and.

Here we investigated attenuation and transport of orthophosphate-P in gravel aquifer and vadose zone media in the presence and absence of model colloids (Escherichia coli, kaolinite, goethite). Experiments were conducted using repacked aquifer media in a large column (2 m long, m in diameter) and intact cores ( m long, m in.

A series of experimental tracer tests were performed to explore the implications of the change in the pressure status of a heterogeneous bimodal aquifer for scale-dependent dispersion and mass-transfer processes.

The sandbox was filled with sands and gravel channels and patches to form an alluvial-like bimodal aquifer. gravel and sand aquifers. In some geological media groundwater flow occurs through fractures (e.g. granite) or conduits (e.g.

karstic limestone) or through a combination of assumes that the transport of mass does not affect the pattern of flow. The If advection was the only process affecting the transport of a solute in an idealized.

Moltyaner, G., ed.:Transport and Mass Exchange Processes in Sand and Gravel Aquifers: Field and Modelling Studies.

Details Transport and mass exchange processes in sand and gravel aquifers FB2

Atomic Energy of Canada Limited, Ottawa, AECL 2 vol., pp. [Includes 46 papers presented at an international conference and workshop]. The gasoline oxygenate methyl tert -butyl ether (MTBE) has become a widespread contaminant in groundwater throughout the United States. Bioaugmentation of aquifers with MTBE-degrading cultures may be necessary to enhance degradation of the oxygenate in some locations.

However, poor cell transport has sometimes limited bioaugmentation efforts in the past. The objective of this study was.

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Aquifer Basics Links. Home. Unconsolidated and semiconsolidated sand and gravel aquifers. The principal water-yielding aquifers of North America can be grouped into five types: unconsolidated and semiconsolidated sand and gravel aquifers, sandstone aquifers, carbonate-rock aquifers, aquifers in interbedded sandstone and carbonate rocks, and aquifers in igneous and metamorphic rocks.

Accidental release of Marcellus Shale waters (MSW) can release high concentrations of chemicals that can deteriorate groundwater quality. It is important to understand the reactive transport and fate of chemicals from MSW. Natural aquifers typically have complex mineralogical compositions and are heterogeneous with large spatial variation in terms of physical and geochemical properties.

Tracer tests were performed in distinct biogeochemical zones of a sand and gravel aquifer in Cape Cod, MA, to study the redox chemistry (I) and transport (Cs, I) of cesium and iodine in a field setting.

Injection of iodide (I-) into an oxic zone of the aquifer resulted in oxidation of I- to molecular iodine (I2) and iodate (IO3-) over transport distances of several meters. We compared our results of b = and w = for Cd non-equilibrium transport in pumice sand aquifer transport in alluvial gravel aquifer and mass exchange at surfaces.

A natural gradient experiment on solute transport in a sand aquifer: 2. Spatial moments and the advection and dispersion of nonreactive tracers and slowing the rate of advance of the center of mass of the plume as a whole.

Benoit Noetinger, Modeling of transport processes through large-scale discrete fracture networks using conforming. is a vital parameter for LTNE models, as it describes the heat transfer rate between the fluid and solid phases.

As seen above, h sf depends on Nu, the particle size d p, and the thermal conductivity of the fluid λ f (Wakao et al., ).While λ f and d p are usually known in ideal packed beds, Nu must be estimated using an appropriate correlation which commonly depends on the particle.

Site description. The study was carried out in a shallow, unconfined aquifer at the U. Geological Survey research site on Cape Cod, MA[] (Fig. 1).The permeable, glacial outwash sediments consist of coarse-sand and gravel, with lesser fine-sand and silt. [] Mineralogical analyses have focused on the less-thanmillimeter size-fractions.

Baseline conditions for the sand and gravel aquifers (groundwater) in McHenry County, Illinois, were assessed using data from a countywide network of 44 monitoring wells collecting continuous water-level data from – Inwater-quality data were collected from 41 of the monitoring wells, along with five additional monitoring wells available from the U.S.

Geological Survey National. Numerical experiments. in Atomic Energy of Canada Limited, AECL (Report). edn, vol. 2, Publ by AECL, pp.Proceedings of the International Conference and Workshop on Transport and Mass Exchange Processes in Sand and Gravel Aquifers Part 2 (of 2), Ottawa, Ont, Can, 10/1/ Cowdery () reported that the outwash material consisted of 21% gravel, 45% coarse sand, 27% medium sand, and 7% fine sand and silt.

Aquifer thickness is generally about 18 m but, may be over 30 m in places (Reeder, ). It was deposited by meandering debris-laden streams flowing from the disintegrating margin of the Des Moines glacial.

Hydrogeochemical exchange processes in the aquifer can cause a long-term release of iron and manganese even if the organics concentration in the river water is low. Contrary to common expectations, high iron concentrations are often dominated by the portion of landside groundwater, whereas iron concentrations in bank filtrate often undergo a.

Groundwater is stored in the tiny open spaces between rock and sand, soil, and gravel. How well loosely arranged rock (such as sand and gravel) holds water depends on the size of the rock particles.

Layers of loosely arranged particles of uniform size (such as sand) tend to hold more water than layers of rock with materials of different sizes. Tracer Test in a Sand and Gravel Aquifer, Cape Cod, Massachusetts United States Environmental Protection Agency Office of Research and Development Washington DC EPA//R/b March Part 2 Transport of Chromium (VI) and Lead- Copper- and Zinc-EDTA Tracers.

Most glacial-deposit aquifers are in bedrock valleys (A) and might be hydraulically separated from deeper aquifers by clay and silt confining units. Sand and gravel in glacial outwash plains (B) receive recharge directly from precipitation, and the thick sequences of sand and gravel yield large volumes of water to wells.

Figure The Cape Cod Toxic-Substances Hydrology research site in Falmouth, Mass., is the focus for multidisciplinary field studies of the physical, chemical, and microbiological processes affecting transport in a sewage-contaminated sand and gravel aquifer.

Sand and Gravel Aquifer at Marathon, Cortland County, New York By Todd S. Miller Abstract The Village of Marathon, in Cortland County, N.Y., has three municipal wells that tap a relatively thin (25 to 40 feet thick) and narrow (less than mile wide) unconfined sand and gravel aquifer in the Tioughnioga River valley.

EPA//R/a March Multispecies Reactive Tracer Test in a Sand and Gravel Aquifer, Cape Cod, Massachusetts Part 1 Experimental Design and Transport of Bromide and Nickel-EDTA Tracers J.

Davis1, K. Hess2, J. Coston1, D. Kent1, J. Joye1, P. Brienen1 and K. Campo2 1 U.S. Geological Survey Menlo Park, CA 2 U.S. Geological Survey Northborough, MA.

Campo, K.W., and Hess, K.M.,Evolution of a ground-water sewage plume after removal of the year-long source, Cape Cod, Massachusetts--Fate of volatile. mixture of sand and gravel.

Description Transport and mass exchange processes in sand and gravel aquifers EPUB

a) Alternating arrangement of three bed states. b) Fluctuation in gravel transport rate. c) Fluctuation in sand transport rate. From Iseya and Ikeda (). If the flow is of sufficient strength bedforms such as dunes can form in gravel-bed streams (e.g.

Dinehart, ). Dunes are the most common bedform in sand-bed. Albany, the Quaternary confined sand and gravel aquifers are usually deeper than feet. Although there is a great need to map the buried sand and gravel deposits for water supplies, it was not possible to do so within the scope of this project.

It was, however, possible to prepare an aquifer probability map. Problem setup. As shown in Fig. 1b, MSWs are introduced into homogeneous and isotropic natural water systems including ground water in sandstone (S) aquifers and sand and gravel (SG) aquifers and surface water.

This represents a base case scenario with major focus on the coupling of transport and geochemical reactions without considering spatial heterogeneities.however, may result in nondispersive mixing processes.

For example, solute can be transported between mobile and less mobile domains by rate-limited mass transfer (RLMT) (e.g., Pedit and Miller ; Haggerty and Gorelick ), which could impact efficiency. The rate of mass transfer between domains is determined by flow.