Global ETD Search
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Showing 1 to 15 of 15 for “"Depletion rate"”.
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A study of isotopic composition of xylem water of woody vegetation and groundwater along a precipitation gradient in Namibia
… with vegetation. Such information can be integrated in water management plans to estimate the influence of groundwater abstraction on the vegetation. Trees and shrubs are able to access water from: the upper unsaturated soil profile, the capillary zone of a groundwater store, from nearby …
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Experimental Study on Improving the Waterflooding Potential in Different Heavy Oil-Solvent Systems
… to the pressure change, such as the injection rate, the start time of waterflooding, the voidage replacement ratio (VRR) control, etc., have been studied to take full advantage of the nature energies in heavy oil waterflooding processes. However, few researchers have directly studied the …
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Field Investigation of Stream-Aquifer Interactions: A Case Study in Coastal California
… direct push subsurface sampling, constant rate pumping tests, dye tracer tests, electrical resistivity interrogation of the subsurface, and long-term passive monitoring of aquifer hydraulic heads and stream stage, are reported. Additionally, results of laboratory falling-head permeameter …
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Taylor-Aris dispersion in microfluidic networks
… D* and, if necessary, the mean volumetric solute depletion rate K*. The ease with which these discrete calculations can be performed for complex networks renders feasible parametric studies of potential microfluidic chip designs, particularly those pertinent to biomolecular separation schemes. To …
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Microfluidic investigation of cyclic solvent injection: from reservoir-on-the-chip to large scale
… it was found that solvent type, pressure depletion rate, and reservoir characteristics had a significant influence on the extension of foamy oil flow. Accordingly, solvents containing a higher proportion of CO2 exhibited superior performance, primarily due to their ability to lower …
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Non-invasive monitoring of water and solute fluxes in a cropped soil
… technique to monitor processes in the unsaturated zone. It is suitable to quantify solute concentration or soil moisture content at the decimeter scale in different soils and under varying conditions. In combination with TDR and effluent measurements, different aspects of the solute transport …
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Target Design and Optimizations for Spent Fuel Transmutation
… analyzes the use of 1000 MeV proton beams to generate a substantial number of secondary neutrons through spallation interactions with target materials. The secondary neutrons produced from the spallation process are utilized by the LLFP materials, while surrounding blanket materials are selected …
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Spring Hollow Reservoir: Application of a two-dimensional water quality model
… most were determined. Temperature was then calibrated to a subset of the 19-month simulation period by systematically varying the most sensitive parameters. DO was calibrated to the entire simulation period due to the young age of the reservoir and the inconsistent inflow rates and timing. The …
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Ageing of HDPE Geomembranes Used to Contain Landfill Leachate or Hydrocarbon Spills
… four components. First, a laboratory-accelerated ageing investigation of a GM exposed to air, water and leachate at elevated temperatures. Service life of a GM (Stage I: Antioxidant depletion, Stage II: Induction, and Stage III: Polymer degradation) is examined. The results demonstrate the …
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Long-Term Performance of HDPE Geomembranes as Landfill Liners
… based on both conventional laboratory accelerated immersion tests and simulated landfill liner tests. A 1.5mm HDPE geomembrane was immersed in different synthetic leachates at different temperatures in order to evaluate the effects of leachate chemical constituents on the depletion of …
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Characterization of Gas-Oil Flow in Cyclic Solvent Injection (CSI) for Heavy Oil Recovery
… drive and therefore needs to be investigated separately. The differences mainly arise as in CSI the free gas originates from the solvent chamber whereas in heavy oil solution gas drive it evolves from solution gas. Consequently, the combined flow of free gas and foamy oil in CSI yields the …
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Experimental Study of Heavy Oil Recovery Mechanisms during Cyclic Solvent Injection Processes
… conducted using physical sandpack models saturated with live heavy oil of 9,530 mPa.s viscosity. The experiments were conducted in horizontal and vertical mode injection at high- and low-pressure depletion rates using two solvent mixtures of CH4 and C3H8. The sandpack was Computed Tomography …
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An Assessment of Indoor Air Quality at Two Contrasting Location and Building Ventilation Types in London
… metrics in the roadside building recorded higher depletion rates compared to the urban background site. At urban background site, when indoor OP dataset were categorised and group as building occupancy and seasonal dependent, the indoor PM OP antioxidants metrics was found to have a higher …
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Essays on Behavioral Economics and the Utility of Gambling
… on a Logistic Regression classifier, demonstrate robust predictive power, with the Random Forest model achieving an accuracy score of up to 0.912 and an area under the receiver operating characteristics curve (AUC) score of 0.903, and the Logistic Regression model reaching accuracy scores of …
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Experimental Study on Foamy Oil Flow by Using Different heavy Oil-Solvent Systems
… the production performance effects of pressure depletion rates on foamy oil flow have been studied, it remains difficult to understand the process clearly. Meanwhile, many oil samples used in previous studies were on heavy oil-methane systems or heavy oil-CO2 systems, rarely on heavy oil-propane …