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Investigating An Apparent Structural High In Seismic Data In North Terre Haute, Indiana, Through First-Arrival Traveltime Tomography And Gravity Analysis, Daniel Grant Koehl

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This study focuses on northern Terre Haute, Indiana, where seven 2D seismic reflection time sections were collected by CountryMark and donated to Wright State University. Geologically, the area is on the eastern margin of the Illinois Basin. Two of these seismic lines display significant relief along a continuous, high-amplitude horizon approximately 180 milliseconds in two-way traveltime depth. This horizon was previously interpreted by CountryMark to be a Silurian reef core of the type common in this region of the Illinois Basin; however, other seismic lines within the data set display no relief. Furthermore, borehole logs within the area show no …

Application Of Geographical Information Systems To Determine Human Population Impact On Water Resources Of Yellow Springs, Ohio, And The Use Of Lidar Intensities In Land Use Classification, Gregory Geise

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The purposes of the following studies were to investigate natural and human influences on several spatial and temporal aspects of a local and regional environment. The decreasing discharge rate of the ground water supplied Yellow Spring may be caused by the increase in population of the nearby Village of Yellow Springs, Ohio. Periodic measurements of Yellow Spring's discharge rate compared to changes in the town's population showed an inverse relationship, where spring discharge declined as population grew. A sharp decrease in discharge occurred during a period when the spring's facade was modified and an airport was built partially overlying the …

Effects Of Agricultural Land Use On Stream Fish Communities In Ohio, Usa, Blythe Hazellief

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Ohio is a state dominated by agricultural land use. Such land use may directly alter stream waters and instream habitat, which may, in turn, affect fish communities. To examine the effects of agricultural land use on Ohio stream fish communities, I analyzed data compiled by the Ohio EPA, spanning 15 years and including 2,474 statewide sites. For 253 of these sites, I derived land use profiles from the 2011 USGS National Land Cover Database. While habitat quality was not correlated with agriculture, nutrient concentrations, alkalinity and total dissolved solids were positively correlated with agricultural land use within the catchment. Fish …

Soil Moisture, Fire, And Tree Community Structure, William Patrick White

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My study was conducted to understand tree community structure and how soil moisture and fire frequency influence them. Eighteen plots were placed in the Edge of Appalachia Nature Preserve of unglaciated southern Ohio: nine within a prescribed burn site and nine control sites outside the burn. Sites were stratified in triplicate across GIS-derived integrated soil moisture index (IMI) classes. Burning was done in 1996. Overstory species dbh and sapling species were sampled 1997, 2001, and 2008. Overstory stems were located in 2009 using range finders. Stem locations were loaded into GIS using novel techniques to quantify individual stem IMI values. …

Using Geographic Information Systems To Select Sites For Wetland Restoration In West Central Ohio's Agricultural Areas, Janice M. Hartkorn

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The Mississippi River Basin, includes a major part of Ohio has encountered increasing phosphorus and nitrogen loads from agricultural fields since the 1800's when intensive agriculture moved into the Midwest. Agriculture has drained ninety percent of Ohio's native wetlands. A portion of those drained wetlands can be restored to functional wetlands to intercept excess nutrients from non-productive or low yield agricultural fields to improve overall water quality. Little is known about finding potential restoration sites, partly because of the difficulty in locating sites capable of supporting successful restoration.

This study investigated the utility of Geographic Information Systems (GIS) as a …