Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 202 for “"Field Scale"”.
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Field scale trials of a geosynthetic capillary break
This thesis discusses the field testing of a newly-developed product, a geosynthetic capillary break (GCB). The GCB was developed for use in engineered soil covers when a cover incorporating a capillary break effect would be desirable, but the coarse-grained material (gravel or sand) is unavailable …
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Biotic control of LNAPL longevity - laboratory and field- scale studies
… engineered conditions. Herein, laboratory and field-scale modeling studies were conducted to evaluate LNAPL longevity. Laboratory studies evaluated loss rates as a function of total contaminant concentration under sulfate-reducing (SR) and methanogenic (MG) conditions. Biotic and abiotic loss …
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Geochemical Impacts From Permanganate Oxidation Based on Field Scale Assessments.
<p>In situ chemical oxidation (ISCO) using permanganate is a technology for treatment of organic hazardous wastes. This research is a review of 30 permanganate (MnO<sub>4</sub><sup>-</sup>) ISCO sites to determine whether there are long term impacts on groundwater quality due to the introduction of …
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Deep learning framework bridges lab and field scale microseismic focal mechanism
… can be difficult to constrain and automate in field applications owing to the requirement of a seismometer array with good azimuthal coverage and signal-noise ratio. There exists a wealth of laboratory acoustic emissions (AE) data obtained under controlled laboratory conditions which can aid in …
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Investigation of Copper Pitting Propensity Using Bench and Field Scale Testing
… zinc polyphosphate produced the least amount of scale, whereas the control produced the greatest amount. Further, surface analyses also suggested that zinc and phosphorus may behave synergistically during precipitation reactions which decrease copper release. Subsequent testing at Virginia Tech …
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Modeling Spatial Variability of Field-Scale Solute Transport in the Vadose Zone
… of pollutant distribution in natural field conditions. In this study, a stochastic framework (SF) was developed to represent spatial variability of soil properties in one-dimensional solute transport models, and implemented with two existing root zone leaching models, Opus and GLEAMS. …
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SAR for superficial soil moisture retrieval at the field scale over an agricultural area
… soil moisture from space-borne SAR data at the field scale. Superficial soil moisture is indeed generally estimated from SAR images at lower resolutions, rarely reaching the sub-kilometric scale. This is mainly due to the lack of in situ data, such as measured soil moisture and parameters …
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Physical Investigation of Field Scale Groundwater Recharge Processes in the Virginia Blue Ridge Physiographic Province
… to the subsurface are controlled by a small scale thrust fault associated with regional thrust faulting within the Blue Ridge Province. Recharge rates appear to be correlated to spatial variation in the hydraulic conductivity of the regolith, which has been influenced by weathering rates and …
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Field-Scale Monitoring and Laboratory Simulation of Geosynthetic Liners During Construction and After Placement of Waste
… liner performance – are examined. First, field-scale monitoring of geomembrane wrinkles in a 1.5-mm-thick, black high-density polyethylene geomembrane during placement of cover soil is reported from three field investigations with an emphasis on the effects of cover soil placement …
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Sorption and Biodegradation of Organic Solutes Undergoing Transport in Laboratory-scale and Field-scale Heterogeneous Porous Media.
… in-situ biodegradation during well-controlled field and laboratory experiments. Specifically, this study investigated how residence time and scale influence the extent and rate of in-situ biodegradation of an organic solute undergoing transport. The transport of the biodegradable solute was …
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Multiphase flow in porous media: the impact of capillarity and wettability from field-scale to pore-scale
… is that it encompasses a wide spectrum of length scales-while capillary force is active at the pore-scale (on the order of microns), it can have a significant impact at the field-scale (on the order of kilometers). In this Thesis, we employ novel laboratory experiments and mathematical modeling to …
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Critical analysis of the field scale application of in situ chemical oxidation for the remediation of contaminated groundwater
Includes bibliographical references.
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Using MT3DMS for simulation of field-scale heat transport with groundwater advection for applications to borehole geothermal systems
Made available in DSpace on 2021-03-05T21:38:22Z (GMT). No. of bitstreams: 3 ZONG-THESIS-2020.pdf: 3973446 bytes, checksum: 93c7e44ec5fee74eee8e03ac7dc5614e (MD5) coupled iterative code.rar: 1616113 bytes, checksum: b3a99832c493aae0621043cf8bf2469d (MD5) LICENSE.txt: 4207 bytes, checksum: …
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Determining the Feasibility of Using Remote Sensing to Estimate Irrigation Water Use in South Dakota at the Field Scale
… to monitor Irrigation water use at the field scale in a consistent manner over a large area through the use of satellite imagery. Several existing ET remote sensing models rely on a thermal band arid/or red and near infrared bands of the electromagnetic spectrum. In this study, two …
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Subsurface methane migration from natural gas distribution pipelines as affected by soil heterogeneity: field scale experimental and numerical study
… gas migration caused by leaking pipelines. Eight field-scale experiments were performed in custom designed test beds with different soil textures, pipeline burial depths, and alterable leak rates and soil moistures. Subsurface and surface methane concentrations in addition to soil moisture, …
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On-farm evaluation of nitrogen use efficiency and nutrient balances at the intra-field scale in north-central Illinois
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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The performance of a field scale biofiltration cells in reducing nutrient rich surface runoff from an informal settlement in South Africa
… on water treatment, firstly by utilising field scale biofilter cells to mitigate the impact of elevated nutrient concentrations from an informally settled catchment; and secondly, to recover, and assess the risk of reusing treated water for irrigation of food gardens in a food insecure and …
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Improving food safety when traditional lab experiments with pathogens won’t work: corn wet milling and preharvest soil safety on pilot and field scale
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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