WorldCat Identities

Mississippi State University Department of Geosciences

Overview
Works: 20 works in 20 publications in 1 language and 19 library holdings
Genres: Academic theses  Geographic information systems 
Publication Timeline
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Most widely held works by Mississippi State University
School’s out for weather : Early dismissal in public school districts on potential severe weather days by Jessica Van Meter( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Survey responses from 76 public school districts in Mississippi and Alabama, tornado warning data, tornado path data, and county demographic data were used to investigate early dismissals in public schools. There was little agreement among survey responses and this inconsistency supports the idea that each situation is unique and one plan may not be successful for all districts. The highest number of reported dismissals would have resulted in a loss of less than 2% of the total annual class time. A higher number of recent killer tornadoes, a lower level of poverty, and a team rather than individual decision were the three most important variables in determining which districts would dismiss more often. The seven districts that reported not dismissing were all well below the national poverty average. Other important factors included smaller county area, higher number of killer tornadoes since 1950, and serving a county rather than city population
Investigation of parent source material in Smith County, Mississippi by Kayla Jean Calhoun( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Calcium bentonite deposits of the Glendon and Bucatunna formations of the Oligocene Vicksburg Group located in Smith County, Mississippi were examined to determine the depositional environment, diagenetic history and origin of the bentonite. Traditionally, calcium bentonite was considered to be the product of the weathering of volcanic ash deposits. The hypothesis tested is that the bentonite deposits are not a result of weathered volcanic ash, but are a result of weathered marl. Core samples were drilled from the Chisholm bentonite mine in Smith County and were studied using X-ray diffraction, scanning electron microscopy, and petrographic microscopy. Abundant bacteria along with nanometer-scale organic textures were found throughout and are consistently associated with bentonite, illite, and smectite. No evidence of volcanic ash was found. It appears that the calcium bentonite clays in the Glendon and Bucatunna formations of Smith County, Mississippi formed from weathering, including bacterial activity, of glauconite-bearing marl
Geographic analysis of tornadogenesis from landfalling and nearby tropical cyclones in the state of Florida by Charles Eugene Roop( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Tropical cyclone (TC)-spawned tornadoes in Florida were analyzed to determine patterns of occurrence based on storm and geographic features. Tornadoes were determined to be associated with a landfalling or nearby TC if a tornado occurred within 800 km of the TC's center of circulation. TC-tornadoes were analyzed for patterns based on distance and angle from TC's center, topographic influences, population biases, and influence based on time of landfall. Most TC-Tornadoes tend to occur more often before landfall than after. It was discovered that tornadoes have occurred in different areas with respect to the bearing from the center depending on the landfall location and time of landfall. It was also discovered that land use type, and elevation had little to do with TC-Tornado occurrence. The results do suggest some population bias. The findings will be a guide for operational meteorologists to aid in forecasting likely tornadogenesis from TCs
Factors influencing gypsum crystal morphology within a flue gas desulfurization vessel by Kinsey M Byrd( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Flue gas desulfurization (FGD) is utilized by the coal-powered generating industry to safely eliminate sulfur dioxide. A FGD vessel (scrubber) synthetically creates gypsum crystals by combining limestone (CaCO₃), SO₂ flue gas, water and oxygen resulting in crystalline gypsum (CaSO₄ ∙ 2H₂O), which can be sold for an economic return. Flat disk-like crystals, opposed to rod-like crystals, are hard to dewater, lowering economic return. The objectives were to investigate the cause of varying morphologies, understand the environment of precipitation, as well as identify correlations between operating conditions and resulting unfavorable gypsum crystal growth. Results show evidence supporting airborne impurities due to the onsite coal pile, the abundance and size of CaCO₃ and high Ca:SO₄ ratios within the scrubber as possible factors controlling gypsum crystal morphology. In conclusion, regularly purging the system and incorporating a filter on the air intake valve will provide an economic byproduct avoiding costly landfill deposits
Slope stability analysis of spoil dragline bench in lignite coal mine, Choctaw County, Mississippi by Maria Laila Jover( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

Spoil pile stability in an open pit coal mine is a common problem and the Red Hills Lignite Mine in Choctaw County is no exception. The mine has had spoil stability problems of their spoil dragline bench since the beginning of their activity in 2002. They have managed to stabilize the conditions by installing prefabricated vertical drains (PVD) to consolidate the layers below the spoil dragline bench, which tended to fail due to an increase in pore water pressure. In this study, the capability of analyzing and predicting future pore water pressure conditions is examined. With the use of the stability model Slope/w and local stress calculations, the predictability of the necessity of PVDs and their spatial distribution are analyzed. The outcomes prove to be circumstantial to local pore water pressure and geology changes, therefore, the spacing between drains could be adapted to the local conditions potentially saving costs
Evaluation of the watchdog weather station to reduce drift from MDOT spray trucks by John D Byrd( Book )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Wind speed data collected with the Spectrum Watchdog Sprayer Station were compared to data recorded with a Young 05103-5 anemometer at the Rodney R. Foil Plant Science Research Center on the Mississippi Sate University campus June and July, 2014 and 2015. The manufacturer’s specifications advertise the Sprayer Station wind speed accuracy for wind speeds less than 12 mph is ±1.1 mph and wind speeds greater thatn 12 mph is ±2.3 mph. While the wind speed data recorded by the Watchdog Sprayer Station followed the same trend as the data recorded with the Young anemometer, variations in wind speed both above and below that recorded by the Young anemometer indicate the Watchdog precision is not sufficiently reliable of the actual wind speed. Wind speed data recorded by the Young anemometer and Watchdog Sprayer Stations were poorly correlated at 0.61 and 0.49 for collection periods in 2014 and 2015, respectively. These data indicate the Watchdog Spryer Station does not measure wind speed with sufficient reliability to provide a MDOT spray truck driver, a true indication when wind speeds are above or below safe parameters for spray applications to avoid drift
Degree of pyritization and methylmercury analysis, Weeks Bay Alabama by Henry A Stauffenberg( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

Methylmercury (MeHg) production is magnified in the natural environment by geochemical influxes and an active sulfate reducing bacteria community. It has been found that the presence of sulfides, excess nutrients, and the type of depositional environment (normal marine or euxinic) greatly influences MeHg production and degree of pyritization (DOP). The aim of this research is to investigate a possible connection between MeHg accumulation and the DOP in Weeks Bay sediment. Collected sediment samples have confirmed a significant presence of total reduced sulfides, inorganic mercury, reactive iron, and total organic carbon. Pyritization results indicate a normal marine environment and, of the three measured elements (S, Fe, and C,) carbon and sulfur are the dominant limiting factors to the DOP in Weeks Bay. Current geochemical and pH/redox conditions favor MeHg and pyrite production. The quantified pyrite greatly exceeds that of MeHg indicating DOP inhibits MeHg precipitation
Hydrogeological assessment for a suitable location of a reservoir lake in George County, Mississippi / by Corey Tanner Ladner by Corey T Ladner( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

The construction of a reservoir lake was proposed in 2010 for George County, Mississippi, USA. The proposed reservoir would be designed to serve primarily for industrial water storage. As the preliminary portion of the reservoir project, a baseline watershed assessment was performed for the purpose of identifying a reservoir site with potential to fill a lake volume capable of providing a sufficient water supply to prevent the Pascagoula River near Graham Ferry, Mississippi from dropping below a measured 7Q10 base flow when 100 million gallons of water per day are withdrawn from the river for industrial use. The initial focus of the assessment was on three watersheds Big Creek, Big and Little Cedar Creek, and Escatawpa River. Evaluations of surface water quantity and quality measurements along with reservoir daily water storage models suggested two reservoirs were suitable for continuation of the reservoir project
Analysis of geospatial route reconnaissance methods of modern day battlefields by Bradley Steven Ulmer( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Route reconnaissance has been valuable for military commanders for centuries. Engineering forces are specifically tasked to gather route reconnaissance intelligence to present to the maneuver commander. US Army Engineers presently use a variety of highly technological methods to collect, process, and present this detailed route reconnaissance intelligence. This thesis examines and analyzes the capabilities of four reconnaissance groups. Using a matrix, each of the four units is ranked based on surveys of reconnaissance officers and on the personal experience of the author of this thesis. Results show that Unit 2 (FEST-M) is the most qualified unit to collect detailed geospatial route reconnaissance of the battlefield. The ARRK/TETK software system has helped this unit rise to the top over the other reconnaissance unit types analyzed. The need for geospatial route reconnaissance will continue to be a part of the modern day battlefield and will change constantly as technology is updated
An assessment of human vulnerability to prolonged cold in the Zeravshan Valley of Tajikistan by R. Bryson Touchstone( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

The Central Asian country of Tajikistan is the poorest of the former Soviet republics; it is also prone to a plethora of natural hazards including mass wasting, flood, and extreme temperature. This thesis seeks to characterize how vulnerable rural Tajik mountain communities are to prolonged cold. The primary focus was in Navobod, in the Zeravshan Valley of Tajikistan, where semi-structured interviews were conducted with 31 households, the village leader and doctor, and school staff. The results from the interviews were compared with GIS analysis of the region. Interviews indicated that the area is highly vulnerable to the impacts of prolonged cold. These rural residents continue to practice unsustainable land use, primarily for agricultural and biofuel resources. With unreliable sources of income, a fragile national economy, and decreased access to markets, these residents are ill-equipped to mitigate the impacts of prolonged cold weather. GIS results largely supported interview results
Investigation of the variability of extreme tornado climatology by Tory Farney( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Previous tornado climatology research has relied primarily upon means of tornadoes or tornado days. Understanding the variability of tornado days however, will result in a more comprehensive understanding of the climatological distribution of tornadoes. In a changing environment, the extremities of a distribution should change faster than the mean of that distribution. Two methods of analyzing tornado days for predefined areas across the continental United States using the Storm Prediction Center's publication Storm Data from 1950 to 2011 are conducted in this study. Statistical analysis of averages, return periods, and percentiles reveals the variability in the record while consecutive tornado days present an alternative way to assess the seasonal repeatability and to assess risk for historic, multi-day tornado outbreaks. The results of this research will help to better define the traditional “tornado alley” as well as highlight other high- risk locations, especially those with higher interannual variability
Identification of acid volatile sulfides as a predictor of sediment oxygen demand and comparison of the degree of pyritization between Weeks Bay, AL and Old Tampa Bay, FL by Erin Leigh Anderson( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

Weeks Bay, AL is a governmentally protected reserve near Mobile Bay, AL, while Old Tampa Bay, FL is an urbanized estuary, located along the western coast of Florida. Estuary health is important to local economies and the health of local marine life, with an emphasis on low levels of eutrophication. Sediment oxygen demand (SOD) is usually measured to qualify the environmental health of estuaries, but SOD is timeconsuming and expensive. Average acid volatile monosulfides (AVS) concentrations were found to accurately predict SOD variances. The Degree of Pyritization (DOP) is a measure of long-term sediment oxidation conditions, which indicates normal estuary state. Despite the urban land use practices of these two bays, the DOP of each bay is similar
The effects of land use and contaminant transport at a proposed reservoir site in Smith County, Mississippi by William Earl Cherry( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

This study investigates nutrient and contaminant transport within the Oakohay Creek watershed in order to (1) demonstrate the effects of land use on water quality, (2) model and predict the trophic state of the proposed reservoir given current nutrient loads, and (3) understand potential groundwater flow paths within the reservoir footprint. This study demonstrates that the current, large-scale poultry industry, though not statistically significant with a confidence of 95%, does have a negative impact on the surface water quality. The study also shows evidence for a eutrophic reservoir (TSI-P of 59.4 area-weighted mean) with an increased potential for nuisance algal growth in the northeast segment (TSI-P of 66.0). Dye tracing studies suggest the potential for groundwater flow out of the reservoir as a result of potential paleo-channels within the Glendon Limestone. This study concludes that the location on the Oakohay Creek is not suitable for the construction of a reservoir
Investigation of vegetation discontinuities and the enhancement of convection related to the April 27 2011 multiple EF4 and EF5 tornado scars by Barrett Frank Gutter( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

During the April 25 – 28, 2011 severe weather outbreak, 350 tornadoes were confirmed across 21 states, making the event the largest 3-day outbreak in U.S. History. Of the 350 tornadoes, 13 were of EF4 or EF5 strength. Due to complex terrain and vegetation in northeastern Alabama, northwestern Georgia, and eastern Tennessee, only four tornadoes were analyzed in this study. +Abrupt changes in vegetation and the related sensible and latent heat fluxes have been shown to enhance convective activity along and near the resulting land surface discontinuities. This study analyzed heightened convective activity (analyzed by looking at cloud-to-ground lightning data) along each tornado track on days of weak synoptic forcing. Post- tornado months showed no signs of enhanced convective activity along any of the tornado tracks analyzed in this study, which could be attributed to several factors including study period, duration of intensity, tornado track length and width, and land cover
Abstracts of papers to be presented at the Meeting of the Southeastern Section of the Geological Society of America and associated societies : Jackson, Mississippi, March 14-15, 1996 by Geological Society of America( Book )

1 edition published in 1996 in English and held by 1 WorldCat member library worldwide

Assessment of reservoir quality and potential impact of sequestered carbon dioxide in diverse lithological reservoir units, south central, Mississippi, USA by Assonman D Degny( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

This study was designed to understand the possible impact of carbon dioxide on different reservoir rocks in south-central Mississippi. Eight samples, including six from the Heidelberg field (Mississippi), were exposed to carbon dioxide under simulated subsurface conditions of elevated temperature and pressure and then analyzed using thin section petrography, scanning electron microscopy, X-ray diffraction, and focused ion beam-SEM. Three of the eight samples showed dissolution in calcite and corrosion in smectite. SEM and EDS analysis of treated sample 5 (Se-5/shaly-sandtsone) and sample 8 (S-8/dolomitic-limestone) revealed newly precipitated lath- and fibrous-like crystals composed of sulfur (S), oxygen (O), and calcium (Ca), thus interpreted as gypsum. Three-dimensional analysis using FIB of dolomitic limestone samples (Smackover Formation) revealed that gypsum crystals fill fracture porosity. This study significantly contributes to the understanding of carbon dioxide impact on reservoir rock and promotes better management of natural gas resources
A basin-specific characterization of the subsurface geology of potential reservoir locations in George County, Mississippi by Adam D Lenz( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

The preliminary assessment for reservoir sites in George County targeted three basins within the county as the initial focus of the research study: Big Creek, Big Cedar Creek, and Escatawpa River basins. As a portion of the reservoir study, this study was a basin-specific geological assessment of the three basins within George County through literature review, well log correlation, and a county wide spring inventory. The goal of this study was to obtain and interpret subsurface data in order to develop detailed geologic maps and stratigraphic cross sections which aided in the site assessment and characterization of the geologic and hydro-geologic suitability of potential reservoir sites. This study concluded that the hypothesis was proved and all three selected drainage basins were potentially geologically suitable to sustain a large reservoir, therefor other factors should be taken into account to determine specific reservoir location such as stream discharge and water quality
Salt marsh sediment biogeochemical response to the BP Deepwater Horizon blowout (Skiff Island, LA, and Cat Island, Marsh Point and Saltpan Island, MS) by Calista Lee Guthrie( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

The impact of the Deepwater Horizon blowout on coastal wetlands can be understood through investigating carbon loading and microbial activity in salt marsh sediments. Carbon influx causes pore water sulfide to increase in wetland sediment, making it toxic and inhospitable to marsh vegetation. High sulfide levels due to increased microbial activity can lead to plant browning and mortality. Preliminary analyses at Marsh Point, Mississippi indicated that sulfate reducing bacteria are more active in contaminated marsh, producing sulfide concentrations 100x higher than in noncontaminated marsh. Sediment electrode profiles, hydrocarbon contamination, and microbial community profiles were measured at three additional locations to capture the spatial sedimentary geochemical processes impacting salt marsh dieback. Findings indicate that response to contamination is variable due to physical and biogeochemical processes specific to each marsh. Temporal evaluation indicates that there is a lag in maximum response to contamination due to seasonal effects on microbial activity
Urban fringe and transportation corridor convection-diffusion model for anthropogenically-initiated wildfire ignition prediction by Raviraj Sadasivuni( )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

A novel approach for modeling anthropogenically-initiated wildfire ignition was developed that significantly advances the theoretical knowledge of human-wildfire interactions. Gravity interaction models that are commonly used for economic analyses associated with business competition were combined with fluid dynamics models that mimic human movement patterns to predict the probability of anthropogenically-initiated wildfire. Herein, a combined gravity interaction and fluid dynamics models is developed and validated for wildfire potential prediction against historic and current wildfire data. The study identified population centers and transportation corridors, in particular: proximity to railroads and roads; traffic volume; and density of the corridors as the most influential factors for wildfire ignition. The population centers are identified as global influencing factors, and are modeled as the gravity term. The transportation corridors are identified as local influencing factors, and are modeled using fluid flow analogy as diffusion and convection terms. An analytic convection diffusion model (CDM) model is derived and the model coefficients calibrated using historic wildfire data. The model is implemented in GIS, and applied for the prediction of wildfire potential prediction in southeastern Mississippi. The model shows a correlation of R2=0.87 against winter historic data, whereas the Gravity model with a fuel component shows only R2=0.75 correlations. The improved predictions using the proposed CDM model is due to its capability to predict both the global and the local measure of incendiary activity patterns within a single dynamic equation. The CDM model can be used as a standalone model that can predict the wildfire potential in a region. It can also be combined with the fuel layer and meteorological conditions to obtain spatio-temporal variation of wildfire risks, which would provide a decision support system for wildfire mitigation and land use planning and development. The CDM model will help fire managers better plan wildfire mitigation (fuel reduction) strategies and effectively stage equipment and personnel geographically in areas of drought that are coincident with high ignition probability. Land use and transportation managers will gain better understanding of the changes in wildfire risk pattern due to urban fringe development
Field methods in meteorology( )

in English and held by 0 WorldCat member libraries worldwide

 
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