Swenson College of Science and Engineering
Persistent link for this communityhttps://hdl.handle.net/11299/226844
Swenson College of Science and Engineering
Historical note: The Swenson College of Science and Engineering was previously called the College of Science and Engineering (1984-2007). Before that it was part of the College of Letters and Science (1974-1984).
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Item Annual Northeast Regional Science Fair Newsletter (1978-01)(1978-01) University of Minnesota, Duluth. College of Letters and ScienceItem Annual Northeast Regional Science Fair Newsletter (1978-02)(1978-02) University of Minnesota, Duluth. College of Letters and ScienceItem Annual Northeast Regional Science Fair Newsletter (1978-09)(1978-09) University of Minnesota, Duluth. College of Letters and ScienceItem Annual Northeast Regional Science Fair Newsletter (1979-01)(1979-01) University of Minnesota, Duluth. College of Letters and ScienceItem Annual Northeast Regional Science Fair Newsletter (1979-02)(1979-02) University of Minnesota, Duluth. College of Letters and ScienceItem Brownfields Site Analysis(2022) Dunham, SydneyItem College of Science and Engineering, University of Minnesota-Duluth: Presentation to the Education Planning and Policy Committee, Board of Regents, April 5, 1990(1990-04-05) University of Minnesota, Duluth. College of Science and EngineeringItem Duluth Energy systems Lake Source Heat Pump Cost Proposal(2022-09) Loer, BereketThe feasibility of bringing a lake-source heat pump to the city of Duluth; taking into account varying natural gas and electricity rates.Item Groundwater Flow Modeling and the Delineation of Wellhead Protection Areas, Cass County, Minnesota(2002-09) Bertsch, Benjamin RobertMinnesota Rules define wellhead protection as "a method of preventing well contamination by effectively managing potential contaminant sources in all or a portion of a well's recharge area". They further state that this recharge area, or wellhead protection area is the "surface and subsurface area surrounding a well or well field that supplies a public water system, through which contaminants are likely to move toward and reach the well or well field". 1986 Amendments to the Safe Drinking Water Act mandated States to prepare a Wellhead Protection Program and submit it to the Environmental Protection Agency by 1989. Whereas the EPA allows flexibility in each State's specific Wellhead Protection Plan Program, the programs must address certain criteria. Through legislation, the Minnesota Department of Health has established guidance for communities to follow in developing their Wellhead Protection Programs. This guidance provides for ample involvement at the community level, but relies on scientific investigation for the delineation of the wellhead protection area. Using four communities in Cass County, Minnesota, this study demonstrates the value of published data and local expertise in creating groundwater flow models for use in delineating wellhead protection areas. The guidelines established by the Minnesota Department of Health for delineation of wellhead protection areas requires that five criteria must be addressed. These criteria are: Time of travel: The time of travel must be at least ten years. Flow boundaries: The location and influence of flow boundaries must be identified using existing information. Daily volume of water pumped: The daily volume of water pumped must be calculated for each well in the public water supply system. Groundwater flow field: The groundwater flow field must be identified for the aquifer used by the public water supply. Aquifer transmissivity: The aquifer transmissivity must be calculated. Using MODFLOW, a modular three-dimensional finite-difference groundwater flow model, steady state flow models of the four areas were created and calibrated. MODPATH, a particle tracking post-processing package for MODFLOW, was used to determine the well capture zone. Landform assemblages provided a framework for data entry into the model. Minnesota Department of Health Water Well Records supplied stratigraphic information. USGS 1:24,000 quadrangle topographic maps provided calibration data. Assistance from State and County employees and local well drillers addressed specific local geologic and hydrogeologic variables. The resultant flow models and particle traces established wellhead protection areas for the communities studied. These wellhead protection area delineation's address State guidelines and were accomplished in an economic, efficient manner.Item Holocene Climate and Environmental Change from White Owl Lake Sediments, White River Plateau, Colorado(2009-06) Kramer, Marian EstherThis Masters project investigates the Holocene lacustrine sedimentary record of White Owl Lake (3,270 m), a small alpine lake located on the White River Plateau in west-central Colorado. Past changes in the watershed and within the lake are reflected in the sedimentary geochemical record; timing is constrained by radiocarbon ages. The combined data have been used to develop an age model and compare paleoclimatic and paleoenvironmental interpretations with findings from other nearby studies. Processes reflected in the geochemical record include development of terrestrial vegetation, lake basin evolution, changes in primary productivity, preservation of carbonates, changes in hydrology, and shifts in silicate provenance. Seismic-reflection profiles were used to select a site for sediment coring and to create a bathymetric map of White Owl Lake. Lithological changes in the White Owl Lake sedimentary record provide a unique opportunity to develop and calibrate a method to estimate the abundances of the major components of a typical lake sediment (carbonates, organic matter, and the residual mineral fraction) using scanning x-ray fluorescence (XRF) analysis and geochemical data from the core. The purpose of developing this method is to allow estimation of major components to guide decisions for other detailed analytical work. This research project is a part of a larger USGS project aimed at reconstructing changes in the Holocene hydrology and climate (hydroclimate) of the Upper Colorado River Basin, including the White River Plateau, using lake sediments. Interpretations from this project will add to the ongoing USGS study, and our understanding of millennial-scale Holocene climate variability on the plateau.Item The Interface (1984-10)(University of Minnesota, Duluth, 1984-10) University of Minnesota, Duluth. College of Science and EngineeringItem The Interface (1985 Fall)(University of Minnesota, Duluth, 1985) University of Minnesota, Duluth. College of Science and EngineeringItem The Interface (1985 Spring)(University of Minnesota, Duluth, 1985) University of Minnesota, Duluth. College of Science and EngineeringItem The Interface (1985 Winter)(University of Minnesota, Duluth, 1985) University of Minnesota, Duluth. College of Science and EngineeringItem Interface (1986 Fall)(University of Minnesota, Duluth, 1986) University of Minnesota, Duluth. College of Science and EngineeringItem The Interface (1986 Spring)(University of Minnesota, Duluth, 1986) University of Minnesota, Duluth. College of Science and EngineeringItem The Interface (1986 Winter)(University of Minnesota, Duluth, 1986) University of Minnesota, Duluth. College of Science and EngineeringItem Interface (1987 Fall)(University of Minnesota, Duluth, 1987) University of Minnesota, Duluth. College of Science and EngineeringItem Interface (1987 Spring)(University of Minnesota, Duluth, 1987) University of Minnesota, Duluth. College of Science and EngineeringItem Interface (1987 Winter)(University of Minnesota, Duluth, 1987) University of Minnesota, Duluth. College of Science and Engineering
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