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Articles 1 - 30 of 4753
Full-Text Articles in Physical Sciences and Mathematics
Pfas Mass Balance, Donovan Vitale
Pfas Mass Balance, Donovan Vitale
Honors Theses
First-generation, PFOS-dominant Aqueous Film Forming Foam (AFFF) concentrate of approximately 200 gallons was released to the sewer system from the Kalamazoo/Battle Creek International Airport on March 30, 2021. The AFFF release migrated to the Kalamazoo Water Reclamation Plant (KWRP), raising plant effluent above the Department of Environment, Great Lakes, and Energy (EGLE) PFOS water quality standard for a total of 46 days post-spill, although the influent concentrations exhibited sharp declines after only 7 days. By sampling influent, effluent, and biosolids daily, the only known long duration, high-frequency PFAS data set of an accidental AFFF release was generated. This study has …
Mgrre_Thinsections_Reno 1-27_2, Mgrre
Mgrre_Thinsections_Reno 1-27_4, Mgrre
Mgrre_Thinsections_Reno 1-27_5, Mgrre
Mgrre_Thinsections_Reno 1-27_6, Mgrre
Mgrre_Thinsections_Reno 1-27_3, Mgrre
Mgrre_Thinsections_Reno 1-27_1, Mgrre
Mgrre_Thinsections_Reno 1-27_7, Mgrre
Exploring The Effects Of Tree Roots On Infiltration Process, Nazife Onaral
Exploring The Effects Of Tree Roots On Infiltration Process, Nazife Onaral
Masters Theses
Effects of the root structures on soil infiltration dynamics are not clearly defined. Imaging the complex tree root structures and movement of water through the root ball is a challenging task to achieve without damaging the trees and roots by conventional methods. Commonly used methods are invasive, labor-intensive, and not easily accessible. Ground Penetrating Radar (GPR) has commonly been used to characterize soil profiles and it can be a reliable tool to map complex root structures with a novel high-resolution circular data collection technique. Electrical resistivity tomography (ERT) is another reliable geophysical method to image infiltration processes by the change …
“This Isn't Working For Me. Can We Do It A Different Way?" The Lived Experiences Of Geoscience Students With Learning Disabilities, Nina Morris
Masters Theses
The purpose of this exploratory qualitative study is to better understand the lived experiences of geoscience students with learning disabilities in their geoscience classes. Students with learning disabilities bring a unique perspective while also facing unique challenges in post-secondary education. In the literature, there is limited information on what support and teaching strategies are beneficial to this population. Undergraduate and graduate geoscience students who identify as having a learning disability from colleges and universities in the United States were recruited. Six students consented to participate in the study, and each completed a semi-structured interview. Semi-structured interviews were designed to prompt …
Remote Sensing Application For Landslide Detection: Monitoring Along Eastern Lake Michigan (Miami Park, Mi), Guzalay Sataer
Remote Sensing Application For Landslide Detection: Monitoring Along Eastern Lake Michigan (Miami Park, Mi), Guzalay Sataer
Dissertations
I assessed the nature and spatial and temporal patterns of deformation over the Miami Park bluffs on the eastern margin of Lake Michigan and investigated the factors controlling its observed deformation. Our approach involved the following steps: (1) extracting bluff deformation rates (velocities along the line of sight of the satellite) using a stack of Sentinel-1A radar imagery in ascending acquisition geometry acquired between 2017 and 2021 and applying the Intermittent Small Baseline Subset (ISBAS) InSAR time series analysis method; (2) generating high-resolution (5 cm) elevation models and orthophotos from temporal unmanned aerial vehicle (UAV) surveys acquired in 2017, 2019, …
A Framework For Assessing The 4th Rank Dispersivity Tensor Under Anisotropic Axial Symmetries, Xiang Fan
A Framework For Assessing The 4th Rank Dispersivity Tensor Under Anisotropic Axial Symmetries, Xiang Fan
Dissertations
Multi-dimensional expansion of the advection-dispersion equation necessitated the representation of dispersivity as a 4th rank tensor. This tensorial form of dispersivity has 81 terms in three-dimensions with a maximum of 36 independent terms that may be used to describe Fickian spreading of a dissolved contaminant plume according to intrinsic properties of a porous medium. The complexity of the 4th rank tensor has led to the common practice of simplifying the tensor to only 2 or 3 independent terms by assuming isotropic conditions, although isotropic porous media are uncommon in nature as many natural geologic systems exhibit pronounced anisotropy. A broad …
Mgrre_Thinsections_05_A_95, Mgrre
Mgrre_Thinsections_Mgrre-126_1, Mgrre
Mgrre_Thinsections_Mgrre-126_2, Mgrre
Mgrre_Thinsections_Mgrre-126_3, Mgrre
Mgrre_Thinsections_Mgrre-126_5, Mgrre
Mgrre_Thinsections_Mgrre-126_6, Mgrre
Mgrre_Thinsections_Mgrre-126_7, Mgrre
Mgrre_Thinsections_Mgrre-126_9, Mgrre
Mgrre_Thinsections_Mgrre-126_10, Mgrre
Mgrre_Thinsections_Mgrre-126_14, Mgrre
Mgrre_Thinsections_Mgrre-126_13, Mgrre
Mgrre_Thinsections_Mgrre-126_17, Mgrre
Mgrre_Thinsections_Mgrre-126_18, Mgrre
Mgrre_Thinsections_Mgrre-126_19, Mgrre
Mgrre_Thinsections_Mgrre-126_21, Mgrre
Mgrre_Thinsections_Mgrre-126_22, Mgrre