Bank Pull or Bar Push? An Investigation of the Missouri River's Meander Habits

Type: Graduate
Author(s): Noah Underwood Geological Sciences
Advisor(s): John Holbrook Geological Sciences
Location: Second Floor, Table 2, Position 1, 1:45-3:45

Meander bend theory has been around since Albert Einstein popularized it in the 1920s. Since then, many geologists and physicists have grappled to understand the mechanics and concepts that cause rivers to meander in the ways that they do. Through the years, scientists have learned that bedload, slope, and flow velocity are all major drivers of cutbank erosion and bar building. However, one answer that has eluded scientists to this point is whether bar building (bar push) or bank scour (bank pull) causes meander bend migration. This study aims to analyze meander bend patterns in an 88 Km unchannelized stretch of the Missouri River between Yankton, SD and Sioux City, IA. Landsat images of this stretch over the last 30 years have been processed in remote sensing software to track bank, bar, and channel changes over this span of time. Extensive remote sensing processing (ESRI ArcMap and ArcGIS Pro) and statistical analyses will be performed on the river with respect to bank vs. bar movement, mid-channel bar migration, bar growth, and bar life cycles.

Applying Chemical Analysis Methods to Address Food Desert Problems in Fort Worth

Type: Undergraduate
Author(s): Audrey Wilson Geological Sciences
Advisor(s): Omar Harvey Geological Sciences
Location: Third Floor, Table 9, Position 2, 11:30-1:30

A Potomalogical Study into the Pleistocene Fluvial Terraces of the Red River of the South, Southern Oklahoma and Northern Texas

Type: Graduate
Author(s): Tyler Zeiger Geological Sciences
Advisor(s): John Holbrook Geological Sciences
Location: Third Floor, Table 1, Position 1, 1:45-3:45

The Red River of the South is a highly understudied fluvial system with limited mapping. Early work, however, did map four fluvial terraces along the flanks of the modern river valley. These terraces record a period of time in which the ancestral Pleistocene Red River was a continent-scale river, sourcing from the Rockies and the volcanic uplands of New Mexico and depositing into the Gulf of Mexico. The ages of these terraces, though, are poorly understood. With these four known terraces, spanning the “terrace zone” (a ~5 km radius from the modern valley), and with surface areas of the terraces ranging between ~3 km2 and ~8.8 km2—there exists the potential to document the deposits of these four distinct periods of lateral migration—as well as to characterize various paleochannels and other fluvial features preserved within these terraces through hand auger sampling.

I aim to track the evolution of the Red River both physiologically and geochronologically, utilizing allostratigraphic methods to reconstruct some of the River’s past through the floodplain’s lithology and optically stimulated luminescence (OSL) dating of preserved terraces. I aim to construct detailed cross-sections of the valley fill by sampling the deposits of each of the various ancient terraces, as well as the modern floodplain, running roughly perpendicular to the axis of the current stretch of the Red River. Ideally, I would encounter paleochannels while drilling so as to potentially assess the features of the paleochannel belt. To maximize the likelihood of encountering paleochannels and related assemblages, I have begun to process and analyze Lidar and satellite data in an effort to identify remnants of these paleo-structures. I will collect sealed samples containing silica grains to send for OSL dating. In doing so, I can ascertain definitive dates on when the deposits associated with specific terraces were laid down.

Mapping Fertilizer Runoff in the Mississippi River Delta

Type: Undergraduate
Author(s): Amy Lam Environmental Sciences Graham Rice Environmental Sciences
Advisor(s): Esayas Gebremicharl Geological Sciences
Location: Zoom Room 5, 03:11 PM

The Mississippi River Delta is the 7th largest river delta on Earth that consists of the Mississippi River and the Gulf of Mexico. Additionally, it contains 40% of the wetlands in the contiguous United States and over two million hectares (4,942,108 acres), an area equivalent to the size of two football fields, of agricultural lands. Due to fertilizer runoff from agricultural lands, the river delta has been experienced excess levels of nitrogen and phosphorus. The excess levels of these nutrients have contributed to water pollution in the delta and the hypoxia zone in the Gulf of Mexico. This research will focus on mapping the levels of nitrogen and phosphorous across the river delta to determine where the highest levels are

Assessing Lake Sediment for Use as an Amendment

Type: Undergraduate
Author(s): Meagan Alexander Environmental Sciences Benite Ishimwe Environmental Sciences Olivia Jones Environmental Sciences Manyiel Mel Geological Sciences Montreal Taylor Geological Sciences
Advisor(s): Omar Harvey Geological Sciences
Location: Zoom Room 6, 01:10 PM

Agricultural soils require the presence of three basic plant nutrients: Nitrogen, phosphorus, and Potassium (NPK). Each nutrient has its role in plant growth and their deficiencies have adverse effects. Therefore, detailed analysis was required to analyze whether soils from a lake were sufficient in terms of these nutrients and could be suggested for use as an agricultural soil amendment on a particular plot of land. Experimental study by way of specific chemical analysis methods (LOI, spectroscopy, etc.) looked at water content, pH, EC, SOC (Soil Organic Carbon), phosphorus and nitrogen content in the lake sediments; these values were used to determine what contents/nutrients in the lake sediments would need to be optimized for crops of interest. Results from the concluding experimental procedures would allow the property owner to effectively make use of their resources.

Comparing Different Storm Surge Events and Their Effects on Coastal Vegetation, Southern Louisiana

Type: Graduate
Author(s): Blake Bezucha Geological Sciences
Advisor(s): John Holbrook Geological Sciences Esayas Gebremichael Geological Sciences
Location: Zoom Room 5, 12:54 PM

The Louisiana coast is prone to power tropical storm systems, known as hurricanes, which commonly cause significant damage to the environment and financial infrastructure in coastal states, such as Louisiana. Using landsat data acquired from the USGS, determining land cover degradation from seasonal low-pressure storms that span different decades can be made possible. This GIS-based study also takes into account elevation models (DEMs) to provide an accurate portrayal of how coastal vegetation influences the impact of these storms, as well as how storm intensity influences the morphology of coastlines.

Volcanic Hazard Assessment of Kilauea's Lava Lake, Halema'uma'u

Type: Graduate
Author(s): Lauren Burden Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 2, 12:30 PM

Hawaii’s most active volcano, Kilauea, poses many threats to the surrounding infrastructure of the Big Island. Surface deformation from eruptions and underground magma tunnels have produced a growing lava lake within the Eastern Rift Zone, located on the Southeast tip of the island, since 2018. Using remote sensing techniques and GIS, I will use recent data collected from Kilauea’s eruptions and Halema’uma’u lava lake to create a volcanic hazards map of the region. A volcanic hazards map gives us insight to where the safest place are to inhabit on the surface of the island.

Identifying outcrops of the Eagleford Shale and Woodbine Sandstone in the Dallas-Fort Worth metroplex using GIS

Type: Graduate
Author(s): Josh Davidson Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 4, 02:23 PM

There are many major geologic units that outcrop in various regions of the Dallas-Fort Worth metroplex. A major unit that will be discussed in the current study is the Eagleford Shale. Previous studies have generated geologic maps that illustrate where this unit crops-out within the study region. The goal of this study is to create a modern geologic hazard zonation map of the Dallas-Fort Worth metroplex focusing on areas where the Eagleford crops-out. On this map, I will include the spatial distribution of discovered Eagleford outcrop locations and will integrate photographs that illustrate the stratigraphy of this formations using GIS.
Subsequently, I will use the map to calculate the area of all Eagleford surficial deposits within the study region. This shale is a mudrock that is primarily made up of soft-sediments and clays and can pose a geological hazard where it reaches the surface due to shrinking and swelling. This can cause major foundation issues to infrastructure that is built on this unit. Therefore, this map can be used for the purpose of taking precautionary measures when planning the construction of new buildings and road networks within the Dallas-Fort Worth metroplex.

Identifying the Source of the Lower Cenomanian Maness Shale

Type: Graduate
Author(s): Josh Davidson Geological Sciences
Advisor(s): Richard Denne Geological Sciences
Location: Zoom Room 5, 02:15 PM

The Lower Cenomanian Maness Shale is an argillaceous mudrock that occurs between the Buda Limestone and Woodbine Sandstone in the East Texas Field, and was originally placed within the Washita Group based on its biostratigraphy. It regionally extends throughout the East Texas Basin in tandem with the overlying Woodbine Group and displays considerable thickness and facies variations. The Maness interval is significant because previous studies indicate that it may be a hydrocarbon source rock.
Although this mudrock has been studied for several decades, the sediment source of the Maness remains in question. Prior studies have indicated that the sediment comprising the Maness could have come from multiple sources, one of them being the southern side of the Sabine Uplift. In the current study, I will correlate well logs through the south side of the Sabine Uplift from Polk and Tyler counties through Rusk county. I will then generate an isopach map of the study area and will compare thickness trends to those shown on the composite isopach map constructed by English (2020). Lastly, I will examine a core from Tyler or Polk counties that could potentially reveal clastic sandstones occurring within the Maness. The findings will be used to test my hypothesis that the Maness Shale is sourced from the southern portion of the Sabine Uplift.

Deforestation and Fragmentation in the Atlantic Forest

Type: Undergraduate
Author(s): Connor Duncan Geological Sciences Annie Deck Environmental Sciences
Advisor(s): Esayas Gebremichael Environmental Sciences
Location: Zoom Room 2, 01:42 PM

The Atlantic Forest, which extends over 17 Brazilian States, is one of the richest biomes in the world. Historically it has been a hot spot for biodiversity including endangered and endemic species. Despite this, only 15% of the forest’s original range remains. This loss is disproportionally distributed as 4 of the 17 states accounts for 90% of the loss. The source of this deforestation can be attributed primarily to logging developments and eucalyptus plantations. Through using public geodatabases, satellite imagery, and ArcGIS Pro we will show this forest loss and fragmentation in a visually accessible way.

DETERMINING LEEB HARDNESS AND ITS CONTROLLING FACTORS TO ASSESS THE STRENGTH OF SEDIMENTARY ROCKS

Type: Graduate
Author(s): Clayton Freimuth Geological Sciences
Advisor(s): Helge Alsleben Geological Sciences
Location: Zoom Room 3, 01:26 PM

Hardness, defined as resistance to surface deformation, is an intrinsic property of all materials including sedimentary rocks. The variables responsible for a sedimentary rock’s hardness are not completely understood. By understanding which variables control hardness, we may gain a better understanding of related rock strength. Rock strength, defined as a rock’s resistance to plastic deformation under loading, is an important parameter for many industries such as mining, civil engineering, and hydrocarbon exploration.
Numerous tests such as triaxial tests or uniaxial tests are used to quantify rock strength, but are often expensive, time consuming, or require substantial investment in laboratory setup. To circumvent these issues, other devices have been employed to determine rock strength. For example, the Proceq Equotip Bambino micro-rebound hammer (Bambino) has been used for decades to test the hardness of materials such as concrete, steel, and ceramics. These hardness values have been used to determine material strength. Selected studies on rocks empirically correlate between Bambino-derived hardness value (called Leeb hardness) and uniaxial compressive strength (UCS). However, significant scatter in the data suggest that certain intrinsic (e.g., density, bulk mineralogy, etc.) or extrinsic factors (e.g., sample volume, surface the sample rests on) need to be considered for a better correlation.
In this study, I examined the relations between Leeb hardness and UCS values, while examining lithologic variations and other properties such as bulk mineralogy, water loss, volume, density, and effective porosity. I found that bulk mineralogy, density, effective porosity, and water content correlated with a sample’s mechanical hardness. Also, a sample’s UCS is related to its density, effective porosity, and mechanical hardness. Ultimately, these data validated previous studies and shed new insight on the controlling properties of a rock’s hardness and strength.

Population Density Near Kittanning Coal Deposits

Type: Graduate
Author(s): Ethan Gower Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 2, 02:47 PM

The Kittanning coal seams run underneath West Virginia, southeast Ohio, and southwestern Pennsylvania. It is part of a sequence that underlies the Freeport and Pittsburgh coals. All three seams are of Pennsylvanian Age. Of the seams in the Northern Appalachian Basin, the Kittanning has the among the largest extents. For that reason, it will most likely be the greatest influencer on population patterns. Since the early 1800s, the people of the region mined and used coal to produce their energy. As such, it is the goal of this research is to determine the spatial relationship between the economic coal sources and population centers.

Does emotional intelligence matter when using expressive writing interventions in a large enrollment STEM course?

Type: Undergraduate
Author(s): Emery Green Geological Sciences
Advisor(s): Michael Pelch Geological Sciences
Location: Zoom Room 3, 02:39 PM

Anxiety related to academics, especially with regards to testing, is a rapidly growing mental health issue impacting all undergraduates at TCU. High levels of test anxiety have been shown to inhibit memory recall, reduce exam scores, and promote poor study habits. Expressive writing is a form of test anxiety intervention consisting of a type of free response developed to allow students to release their minds of anxious thoughts and emotions related to exams. Expressive writing has been shown to reduce test anxiety and improve exam performance. However, the effectiveness of expressive writing may be mitigated by a students’ level of emotional intelligence. Emotional intelligence is defined as the capacity to be aware of, control, and express one’s emotions. In order to better understand the connection between emotional intelligence and expressive writing, I conducted an exploratory mixed-methods study using quantitative survey data to inform our selection of interview participants and the initial development of my interview protocol. Initially, to gain insight into students’ responses to the expressive writing prompt, I collected and coded expressive writing samples from GEOL 10113 students during the Fall of 2020. Prior to the beginning of the semester, I asked the students to complete a Trait Emotional Intelligence Questionnaire-Short Form (TEIQue-SF) to assign a numerical value to their approximate emotional intelligence levels. Next, I stratified students by quartiles into high (Q3), medium (Q2), and low (Q1) emotionally intelligent groups. Then, GEOL 10113 students were asked to participate in focus group interviews, and volunteers were subsequently grouped by their TEIQue-SF score into three focus groups relating to the high, medium, and low emotional intelligence bins. Finally, using the focus group interview data and the selected student’s responses from the initial expressive writing exercise, I found that all of the student responses showed consistent differences between the three focus groups. Highly emotionally intelligent students had more positive experiences with the expressive writing exercise while lower emotionally intelligent students tended to have neutral or negative experiences with the activity. Overall, these data suggest that the level of emotional intelligence relates to how willing students were to convey their thoughts and emotions during the activity, which helped the higher emotionally intelligent students to have positive experiences with the writing exercise. The implications of my study are that while the efficacy of the expressive writing exercise is assumed, emotional intelligence is a confounding variable. Students must engage with it in some sort of authentic manner if they are to benefit from the exercise.

Estimating Solar Power Potential in Fort Worth, Texas

Type: Undergraduate
Author(s): William Hart Geological Sciences Jesse Mugisha Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 2, 02:55 PM

Solar energy is a significant contributor to the renewable energy mix. Many urban developments are making investments to install solar systems across feasible areas. The allocation of solar systems relies on the land’s geography and the amount of solar radiation received. The purpose of this study is to apply to determine the best sites for solar installations in urban areas. Using the TCU area of Fort Worth, Texas as a case study, this study will use ESRI’s ArcMap and ArcGIS Pro to estimate the solar power potential of different residential rooftops. The results will be useful in showing what households are most suitable for solar installation based on their expected energy yield.

Mapping Landslide Susceptibility and Ground Displacement Assessment of Travis County, Texas, USA

Type: Graduate
Author(s): Rosbeidy Hernandez Geological Sciences Esayas Gebremichael Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 6, 02:47 PM

Landslides may be caused naturally or triggered by human activities and have enormous societal and economic impacts. Detecting and mapping landslides through the generation of landslide susceptibility maps (LSM) and understanding the factors that trigger these processes will be helpful in land use planning and risk assessments. Moreover, it will also assist landslide mitigation efforts by controlling anthropogenic-led processes that induce landslides. This study deals with the analysis to identify slow-moving landslides in Travis County, Texas. It combines geographic information systems(GIS) and remote sensing datasets and techniques to generate an LSM of the study area and identify ground displacements. Remote sensing data provide key information about the topography and land uses, combined with controlling factors for a landslide occurrence such as slope, geology/soil and geological structures, and vegetation/land uses to perform an empirical approximation to map and assess landslide susceptibility. Once the susceptible areas are identified, analysis for ground displacement is applied using a Synthetic Aperture Radar Interferometric (InSAR) technique referred to as the Small Baseline Subset (SBAS) and field-based multitemporal Real-Time Kinematic (RTK) GPS measurements.

Spatial variation of sediment sources and its implications: U-Pb detrital Zircon analyses of the Mississippian Stanley Group in the Ouachita Mountains

Type: Graduate
Author(s): Andrew Hudgens Geological Sciences
Advisor(s): Xiangyang Xie Geological Sciences
Location: Zoom Room 1, 03:35 PM

The Ouachita Trough is a basin that formed along a passive margin on the southern border of Laurentia caused by the Precambrian–Cambrian rifting of Rodinia and the opening of the Iapetus Ocean. The collision of Laurentia and Gondwana and the closing of the Iapetus Ocean thrust sediments from the Ouachita Trough onto the southern portion of the North American craton to form the Ouachita Mountains. The Ouachita Trough transitioned from a sediment-starved basin into an area of rapid sediment accumulation during the Mississippian. The Stanley Group, of interest in this study, was deposited prior to the collision of the encroaching Gondwana continent to the south. Although there have been many previous studies aiming to determine the provenance history of the Stanley Group, the results are inconclusive. In this study, nine samples from turbidite deposits of the Stanley Group were processed using both U-Pb age dating and core rim analysis. Laurentia and Gondwana have similar aged terranes that are difficult to differentiate. Using core rim analysis allowed us to date both the age of the core and rim of individual zircon grains. We were then able to correlate zircon grains of similar ages to their sources. By analyzing a large area of the Ouachita Mountains, this study shows that the Stanley Group consists of sediments sourced from both Laurentia and Gondwana terranes to the south.

Heavy Metal Contamination Trends in an Urbanizing/Industrializing Low Income Country

Type: Undergraduate
Author(s): Benite Ishimwe Environmental Sciences Esayas Gebremichael Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 1, 03:43 PM

Rapid industrialization and global population growth have increased the number of people living in urban areas worldwide. Developing countries, have seen tremendous increases in their industries over the past decades, which generated both positives and negative effects on their people, environment, and economy. One of the negative impacts of industrialization is industrial pollution and the increase in the number of pollutants released into the environment_ in this case, heavy metals. Heavy metal contamination is an alarming problem that many Developing countries are becoming aware of and trying to address. Heavy metal direct or indirect consumption may result in several health effects in the body, including damage and alteration of normal functioning of organs such as the brain, kidney, lungs, liver, and blood, which later result into acute or chronic diseases. This case study will look at heavy metal contamination cases in Rwanda in different drinking water sources. The focus of this case study will be on some common heavy metals released from industrial waste: Lead, Manganese, Iron, Cadmium, Zinc, and Chromium.

The Effect of Online Coursework on Student Learning and Achievement Gaps

Type: Undergraduate
Author(s): Adrianna Jagodzinski Geological Sciences
Advisor(s): Michael Pelch Geological Sciences
Location: Zoom Room 2, 02:23 PM

Teachers have experimented with the idea of virtual learning and its’ effects on student achievement. Due to the coronavirus pandemic, many schools and universities transitioned from traditional classroom-focused learning to asynchronous online learning. Asynchronous online learning is a type of instruction where online learning is not happening at the same time or place. Consequently, TCU made the abrupt transition in the Spring of 2021 to fully online asynchronous courses. To understand the magnitude of how remote learning can effect students’ academic success, my research project looks at what factors, including remote learning, can predict final grade utilizing GEOL 10113 student performance data and survey data from the spring semester of 2020 surveys. To investigate the impact of online learning, I tested several linear models to determine what confounders have a significant role in predicting students’ success in online and in remote learning. These models investigated which factors, ranging from demographic information to GPA, are significant predictors of both final grade and remote grade. I started the linear model selection process by testing a complex linear model, which had all the possible factors including interactions that can impact final grade or remote grade from the surveys. Once I knew which factors were significant from the complex model, I eliminated non-significant variables and created new models, comparing each model by their AIC values until I found the best-fit linear model for final grade and remote grade. AIC is a measurement of how well a linear model fits and the lower the AIC value the better fit the linear model has. After testing each linear model: GPA, students’ lecture section, remote grade, and exam average were significant to final grade. These models suggest that while remote grade is a significant predictor of final grade, no variable measured in this study is significant enough to impact remote grade. Differing from previous research, my results showed that there were no gaps in achievement amongst gender and underrepresented minority students. Although statistically no variable significantly impacted remote grade, there are trends amongst demographic variables and remote grade, suggesting some potential relationships that could be explored in future studies.

A GIS Based Evaluation of the Effectiveness of Trees to Mitigate Urban Heat Island Effects in Fort Worth, Texas

Type: Graduate
Author(s): Charles King Biology
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 4, 12:38 PM

The Urban Heat Island (UHI) effect is characterized by the differential heating of densely populated urban areas in comparison to surrounding areas. Increased temperatures caused by buildings and other man-made infrastructure have a wide range of human and ecological impacts. One emerging methodology to combat UHI effects is the implementation of urban green spaces and trees. Trees can provide two main functions that aid in cooling; shade from the sun provided by the canopy and cooling through the process of evapotranspiration. This project aims to identify which species of tree best suits the ecoregion of Fort Worth, how much feasible green space Fort Worth can provide, and project the cooling the green spaces could provide if they are planted with trees.

Continued Monitoring of Land Subsidence in Mexico City, Mexico using InSAR Methodology

Type: Graduate
Author(s): Charles King Biology
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 1, 03:19 PM

The use of Interferometric Synthetic Aperture Radar (InSAR) to analyze the deformation of the Earth's surface has become an increasingly important tool for monitoring earthquakes, volcanic activity, landslides, and land subsidence. This process works by calculating the phase differences of radar signals reflected from the Earth's surface over a period of time. If the land has uplifted or subsided, the phase of the two radar signals will interfere. The image this phase difference produces is known as an interferogram, which shows the ground-surface displacement of the target area across the two time periods. This technique has been used extensively to survey Mexico City, which has been an area of concern since the beginning of the 20th century due to its dramatic rate of ground subsidence.

Evaluating the Properties of Coffee Derived Carbon-Based Materials for the Removal of Lead from Contaminated Water

Type: Undergraduate
Author(s): Amy Lam Environmental Sciences
Advisor(s): Omar Harvey Geological Sciences
Location: Zoom Room 1, 01:18 PM

The reusing, recycling, and reduction of waste streams is seen as a viable sustainability strategy. One major waste stream is coffee grounds with about 11.5 million kilograms being generated per day in America of which 90% is landfilled. This waste stream can be repurposed into usable carbon-based materials to address issues of climate, pollution, or engineering applications. For my research, I am converting spent (used) coffee grounds into biochars, a type of carbon-based material, with different charring (burning) temperature to measure the removal of lead (Pb2+) from contaminated water. The charring temperature was changed in order to determine the optimal charring temperature for water treatment. This presentation will go into the maximum amount of lead the biochars can remove, how fast the biochars can remove the lead and the properties of biochars that allow for such removal. Further results, methodology, and modeling applications will be discussed in the presentation.

Organic nanomaterials-ferrihydrite interactions

Type: Graduate
Author(s): Aurore Manzi Geological Sciences
Advisor(s): Omar Harvey Geological Sciences
Location: Zoom Room 2, 03:43 PM

Nanomaterials are the new technologies reforming industrial activities. They are used to improve energy efficiency and storage, to cheaply store and process information in every internet server and personal computer, to facilitate bio-imaging and drug delivery, and in environmental remediation. These materials’ nanometric dimension, 1/100000 the width of a human hair, allows them to have novel characteristics such as strength, electrical resistivity, and conductivity, and optical absorption compared to the same materials in bigger sizes. Due to their widespread and incorporation into consumer products, it is important to understand their interactions with other elements in the environment. I used flow experiments, to understand the effects of the core and terminal groups chemistries of 3 sets of nanomaterials on their interaction with ferrihydrite, a very common and reactive mineral in the environment. The nanomaterials used in this study, namely Graphene Quantum Dot (GQD), PAMAM G4-OH, and PAMAM G3.5-COOH, have comparable sizes, 6nm, 4.5 nm, and 3.5 nm, respectively. When the experiments were conducted under acidic and circumneutral pH, the quantities of GQD and PAMAM G4-OH sorbed were equivalent and less than the quantity of PAMAM G3.5-COOH sorbed. In my presentation, I will go over the quantities and kinetics results from the interactions of the 3 sets of nanomaterials onto ferrihydrite over environmentally significant pH values (range 3-10).

Remote sensing of geothermal potential: Rwanda

Type: Graduate
Author(s): Aurore Manzi Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 1, 12:30 PM

Land surface temperature is a major factor used in the assessment and understanding of several processes including global climate, hydrological, geo-/biophysical, urban land use/land cover (Avdan and Jovanovska, 2016). Since the Soviet Union launched the world's first artificial satellite, Sputnik 1, in 1957 there have been about 8,900 satellites from more than 40 countries launched in space that have opened possibilities to understand the earth using remote sensing. Specifically, LANDSAT 8’s thermal infrared sensor Band 10 data has been successfully used to map land surface temperature. The specific algorithm used to derive land surface temperature from LANDSAT 8’s thermal infrared sensor Band 10 showed standard deviations of 2.4°C and 2.7°C on the first trial and second trial respectively (Avdan and Jovanovska, 2016). In my project, I used land surface temperature in addition to secondary data (geologic features, volcanoes, faults, change in cities' extents) to locate and deduce the potential geothermal plays in Rwanda. I also compared the potential geothermal plays obtained using remote sensing to those obtained using ground measurements to assess how accurate remote sensing tools are in determining geothermal plays.

Volcanic risk assessment of Mount Rainier using GIS methods

Type: Graduate
Author(s): Guthrie McLain Geological Sciences
Advisor(s): Esayas Gebremichael Geological Sciences
Location: Zoom Room 2, 01:58 PM

Mount Rainier is a stratovolcano within the Cascade Arc situated southeast of the cities of Seattle and Tacoma. This region of Washington has undergone substantial population growth while being situated in the shadow of a large stratovolcano. Historically lahar flows, volcanoclastic debris flows, from the volcano have reached as far as Tacoma and could still pose a risk to Seattle and other smaller communities. Seismicity and annual precipitation are large contributors into predicting an eruption event as well as eruption severity. Using ArcGIS Pro and implementing various types of data including historic lahar deposit extent, population growth, seismic activity, and other contributions that can peer into a future volcanic eruption, it can be possible to assess the volcanic hazard Mount Rainier poses on nearby communities.

Interactions of environmentally significant anti-inflammatory drugs with nanocrystalline iron-oxides

Type: Undergraduate
Author(s): Evelyn Morales Geological Sciences
Advisor(s): Omar Harvey Geological Sciences
Location: Zoom Room 1, 03:27 PM

Anti-inflammatory drugs such as ibuprofen and triclosan are widely used and available in many pharmaceutical and personal care products (PPCP’s). The concentrations of these drugs are increasing in public surface and groundwaters and is often linked to negative impacts on aquatic life. These impacts are due to the fact that PPCP’s bypass water treatment facilities since they are not typically regulated and water treatment methods at the facilities are not designed to remove them. My research focuses on removing PPCP’s using reactive environmental sorbents like nanocrystalline ferrihydrite. Specifically, I examined the interaction of two widely used PPCP’s (Ibuprofen and Triclosan) with nanocrystalline ferrihydrite of varying particle size (<125, 125-250, >250). Results thus far show that when Ibuprofen interacts with nanocrystalline ferrihydrite at pH 4.3-4.8; 28.29% was removed when the particle size was less than 125 microns; 45.89% was removed when the particle size was 125-250 microns; and 49.92% was removed when the particle size was greater than 250. While for Triclosan 40.55%, 54.7%, 23.80% was removed by nanocrystalline ferrihydrite with size <125, 125-250, >250 respectively. My presentation will further cover surface properties of nanocrystalline ferrihydrite controlling the sorption of ibuprofen and triclosan.