Physical Sciences and Mathematics Commons^™

A Study On The Causes Of Variations In Transmissivity And Storativity During Pump Tests At Asylum Lake, Paul Joseph Pare

Masters Theses

Over a two year period, Western Michigan University ran a number of pump tests in the Asylum Lake Area in Kalamazoo, Michigan. The transmissivities and storativities calculated from these tests differed significantly from well to well in any particular test, and from pump test to pump test. Utilizing the computer programs AQTESOLV 3.0 and Aquifer Parameter Estimator, a number of T and S values were calculated. After analysis of the results, the following conclusion was drawn. The main reason for the deviations in the T and S values arose from the mixing of the results of numerous methods (some of …

The Effects Of Air Sparging On Aquifer Hydraulic Conductivity, Hans Neve

Masters Theses

Air sparging is a relatively new technology used to remove organic contaminants from aquifers. This remediation technique involves injecting into contaminated portions of water table aquifers. Theoretically air sparging will reduce aquifer hydraulic conductivity. Injected air fills some of the available sediment pores, thus restricting the flow of water to the remaining water-filled pore spaces.

The purpose of this study was to measure the reduction in hydraulic conductivity due to air sparging. This was assessed using both laboratory and field techniques. The hydraulic conductivities of several different sediments were determined in the laboratory using a large constant head permeameter modified …

The Variability Of Carbon Dioxide In The Vadose Zone, John J. Ring

Masters Theses

The purpose of this thesis was to observe and attempt to explain the variations of carbon dioxide in the vadose zone of a nature area in southwestern Michigan. Well nests, consisting of discrete soil gas sampling points and temperature probes set at depths ranging from 3 to 53 feet, were constructed in a sandy, glacial outwash plain. Soil samples were collected for analysis of organic carbon content during installation. Soil gas samples were collected periodically from June, 1992 to March, 1993 and analyzed for CO₂ and O₂ concentrations. Occasionally, samples were collected and analyzed for isotopic C^{13 …}

Evaluation Of Bail-Down Test Methods For Characterizing Free Product Recoverability From An Aquifer, Laura L. Krol

Masters Theses

Determination of the occurrence and recoverability of free product impacting the subsurface environment has been an on-going challenge in the environmental industry. A simple and relatively inexpensive test to perform in the field is the free product bail-down test. Many authors have proposed various analysis methods using these data for the determination of different free product characteristics.

The purpose of this project was to determine the comparability and possible validity of bail-down test interpretation methods for predicting hydrocarbon hydraulic conductivity/transmissivity and true free product thickness. Bail-down test data collected from two sites were analyzed and interpreted using methods from the …

Stratigraphy, Structure, And Environmental Site Assessment Of A Portion Of The Western Blue Ridge, Monroe County, Tennessee, Donald James Geddes

Masters Theses

The western Blue Ridge in southeastern Tennessee is underlain principally by metasedimentary rocks of the Walden Creek and Great Smoky Groups (Ocoee Supergroup). These rocks have traditionally been interpreted as turbiditic synrift sediments deposited along the Late Proterozoic to Early Cambrian southeastern Laurentian margin, which were subsequently metamorphosed and deformed during an early Paleozoic (Taconic) orogeny, then brittlely deformed and thrust westward during a late Paleozoic (Alleghanian) orogeny. More recent hypotheses suggest that at least part of the Walden Creek Group was deposited above the regional Middle Ordovician unconformity in post-Taconic successor basins, and deformed and metamorphosed only during a …

A Feasibility Study For Using Computerized Water Well Records To Delineate Areas Of Recharge-Discharge Potential, Lauren D. Hughes

Masters Theses

A method for delineating areas of recharge-discharge potential has been developed utilizing computerized water well records. The methodology is based on the vertical head differences found between wells with shallow depths of submergence and those with deeper depths of submergence. The residual values generated represent the magnitude of vertical potential and can be contoured to delineate areas of recharge-discharge potential. Well data were obtained from the Kalamazoo County Groundwater Database. Well selection was based on depth of submergence and total well depth.

The methodology was tested in Texas and Schoolcraft Townships, the Donnell Lake Study Area, and Kalamazoo County. Regularly …

Geophysical Investigation At The Mouth Of The St. Joseph River Valley And Adjacent Lake Michigan Shoreline In St. Joseph And Benton Harbor, Michigan, David L. Seng

Masters Theses

A combination of geophysical methods were employed in an attempt to characterize a small section of the shoreline of the St. Joseph, Michigan, region of the Lake Michigan shoreline. Electrical resistivity and Ground Penetrating Radar profiles conducted along the shoreline and within the nearshore environment reveal a buried valley of the ancestral St. Joseph river. This valley represents incision of the channel during lowered lake levels at the end of the Pleistocene.

Lakeward dipping radar reflectors are identified throughout the study site. Within the buried valley the reflectors are not glacial till as is the case outside the inferred valley …

Hydrogeochemical Delineation Of A Groundwater Flow System, Berrien County, Michigan, Patrick J. Bartnik

Masters Theses

The objective of this study was to examine the possibility of determining groundwater flow directions from natural variations in groundwater chemistry. Groundwater samples were analyzed for major cation and anion concentrations. These data were to have been contoured and then compared with groundwater flow maps generated by conventional methods. The purpose was to determine whether a correlation could be drawn between the two methods. However, the results of the study did not allow for this comparison.

The plotted major cation and anion data did not lend themselves to contouring, which suggests that greater control may be required during the selection …