FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2327859897> ?p ?o ?g. }

• W2327859897 abstract "As part of the University of Waterloo continuing experiments at Canadian Forces Base Borden (CFB), a controlled spill of perchloroethylene, a dense nonaqueous phase liquid (DNAPL), was monitored by a variety of geophysical methods. Surface ground penetrating radar (GPR) at 300,500, and 900 MHz and hole-to-hole GPR at 160 MHz were periodically measured at the site for 340 hours. This report presents the results of the first 66 hours of 500 MHz surface data and an example of the 900 MHz data at 14 hours. The surface data were acquired on a one meter grid in both directions across a nine meter by nine meter experimental cell. The borehole radar data were acquired between 8 wells circling the spill point on a 3 meter radius, using all 28 combinations of non-repeating holeto-hole pairs, each at 14 different depths in the cell at 25 cm intervals. The resulting multidimensional (x, y, z, time, frequency, look angle) dataset clearly outlines the movement of the DNAPL horizontally and vertically, and the interactions of the DNAPL with the heterogeneous sand matrix. Subtle changes in grain size distribution and the resultant capillary forces in the sand caused the DNAPL to spend more time and distance in horizontal travel than vertical travel. INTRODUCTION In July and August 1991, the U. S. Geological Survey (U.S.G.S.) participated in an experiment conducted by the University of Waterloo at Canadian Forces Base Borden, in which approximately 770 liters of perchloroethylene were injected over a period of 70 hours into an undisturbed, natural sand aquifer, and then monitored for several weeks. Perchloroethylene (PCE, also called tetrachloroethene, a common dry cleaning solvent) is the third most commonly occurring organic pollutant (Plumb and Pitchford, 1985). The PCE spill was contained in a 9 meter by 9 meter experimental cell constructed of steel sheet piling. The main objective was to determine if various geophysical methods could track movement of the DNAPL in the subsurface (Redman, 1992). Finding and monitoring the movement of DNAPLs are difficult because of their physical properties (Schwille, 1988). DNAPLs have low solubility in water and are denser than water, so they will pool at the base of an aquifer, slowly releasing a toxic dissolved phase into the groundwater (Plumb and Pitchford, 1985). As DNAPLs are generally less viscous than water, movement is generally unrelated to ground water flow and more tightly coupled to geological heterogeneity (Schwille, 1988, Huling and Weaver, 1991; USEPA, 1992). The difficulty in mapping these contaminants is two-fold, lying in the low level of geophysical contrast that these contaminants provide against background soil and rock, and in the low level of contaminant concentration considered to be of regulatory concern (typically parts per billion; USEPA, 1992). Methods used by the University of Waterloo to monitor the spill included surface and borehole resistivity, neutron logging (Schneider and Greenhouse, 1992), surface GPR at" @default.
• W2327859897 created "2016-06-24" @default.
• W2327859897 creator A5043176665 @default.
• W2327859897 creator A5067062196 @default.
• W2327859897 creator A5075510576 @default.
• W2327859897 date "1992-01-01" @default.
• W2327859897 modified "2023-09-22" @default.
• W2327859897 title "Surface And Borehole Radar Monitoring Of A Dnapl Spill In 3D Versus Frequency, Look Angle And Time" @default.
• W2327859897 cites W1515561798 @default.
• W2327859897 cites W1522748071 @default.
• W2327859897 cites W1589423594 @default.
• W2327859897 cites W2312484294 @default.
• W2327859897 cites W2325293762 @default.
• W2327859897 cites W2334883861 @default.
• W2327859897 doi "https://doi.org/10.3997/2214-4609-pdb.210.1992_027" @default.
• W2327859897 hasPublicationYear "1992" @default.
• W2327859897 type Work @default.
• W2327859897 sameAs 2327859897 @default.
• W2327859897 citedByCount "9" @default.
• W2327859897 countsByYear W23278598972015 @default.
• W2327859897 crossrefType "proceedings-article" @default.
• W2327859897 hasAuthorship W2327859897A5043176665 @default.
• W2327859897 hasAuthorship W2327859897A5067062196 @default.
• W2327859897 hasAuthorship W2327859897A5075510576 @default.
• W2327859897 hasConcept C121332964 @default.
• W2327859897 hasConcept C127313418 @default.
• W2327859897 hasConcept C127413603 @default.
• W2327859897 hasConcept C1276947 @default.
• W2327859897 hasConcept C13280743 @default.
• W2327859897 hasConcept C150560799 @default.
• W2327859897 hasConcept C151011524 @default.
• W2327859897 hasConcept C178635117 @default.
• W2327859897 hasConcept C187320778 @default.
• W2327859897 hasConcept C38652104 @default.
• W2327859897 hasConcept C41008148 @default.
• W2327859897 hasConcept C554190296 @default.
• W2327859897 hasConcept C62649853 @default.
• W2327859897 hasConcept C71813955 @default.
• W2327859897 hasConcept C76155785 @default.
• W2327859897 hasConcept C76886044 @default.
• W2327859897 hasConceptScore W2327859897C121332964 @default.
• W2327859897 hasConceptScore W2327859897C127313418 @default.
• W2327859897 hasConceptScore W2327859897C127413603 @default.
• W2327859897 hasConceptScore W2327859897C1276947 @default.
• W2327859897 hasConceptScore W2327859897C13280743 @default.
• W2327859897 hasConceptScore W2327859897C150560799 @default.
• W2327859897 hasConceptScore W2327859897C151011524 @default.
• W2327859897 hasConceptScore W2327859897C178635117 @default.
• W2327859897 hasConceptScore W2327859897C187320778 @default.
• W2327859897 hasConceptScore W2327859897C38652104 @default.
• W2327859897 hasConceptScore W2327859897C41008148 @default.
• W2327859897 hasConceptScore W2327859897C554190296 @default.
• W2327859897 hasConceptScore W2327859897C62649853 @default.
• W2327859897 hasConceptScore W2327859897C71813955 @default.
• W2327859897 hasConceptScore W2327859897C76155785 @default.
• W2327859897 hasConceptScore W2327859897C76886044 @default.
• W2327859897 hasLocation W23278598971 @default.
• W2327859897 hasOpenAccess W2327859897 @default.
• W2327859897 hasPrimaryLocation W23278598971 @default.
• W2327859897 hasRelatedWork W156272033 @default.
• W2327859897 hasRelatedWork W1992315842 @default.
• W2327859897 hasRelatedWork W2001830891 @default.
• W2327859897 hasRelatedWork W2021367482 @default.
• W2327859897 hasRelatedWork W2057944689 @default.
• W2327859897 hasRelatedWork W2116170721 @default.
• W2327859897 hasRelatedWork W2128627622 @default.
• W2327859897 hasRelatedWork W2138251623 @default.
• W2327859897 hasRelatedWork W2160027153 @default.
• W2327859897 hasRelatedWork W2187325439 @default.
• W2327859897 hasRelatedWork W2312507701 @default.
• W2327859897 hasRelatedWork W2314009581 @default.
• W2327859897 hasRelatedWork W2316724213 @default.
• W2327859897 hasRelatedWork W2316933115 @default.
• W2327859897 hasRelatedWork W2319506626 @default.
• W2327859897 hasRelatedWork W2323744656 @default.
• W2327859897 hasRelatedWork W2325041313 @default.
• W2327859897 hasRelatedWork W2333895957 @default.
• W2327859897 hasRelatedWork W2335451881 @default.
• W2327859897 hasRelatedWork W49127583 @default.
• W2327859897 isParatext "false" @default.
• W2327859897 isRetracted "false" @default.
• W2327859897 magId "2327859897" @default.
• W2327859897 workType "article" @default.