Geography Commons^™

A Global Analysis Of Sentinel-2a, Sentinel-2b And Landsat-8 Data Revisit Intervals And Implications For Terrestrial Monitoring, Jian Li, David P. Roy

GSCE Faculty Publications

Combination of different satellite data will provide increased opportunities for more frequent cloud-free surface observations due to variable cloud cover at the different satellite overpass times and dates. Satellite data from the polar-orbiting Landsat-8 (launched 2013), Sentinel-2A (launched 2015) and Sentinel-2B (launched 2017) sensors offer 10 m to 30 m multi-spectral global coverage. Together, they advance the virtual constellation paradigm for mid-resolution land imaging. In this study, a global analysis of Landsat-8, Sentinel-2A and Sentinel-2B metadata obtained from the committee on Earth Observation Satellite (CEOS) Visualization Environment (COVE) tool for 2016 is presented. A global equal area projection grid defined …

Remote Sensing Of The Environmental Impacts Of Utility-Scale Solar Energy Plants, Mohammad Masih Edalat

UNLV Theses, Dissertations, Professional Papers, and Capstones

Solar energy has many environmental benefits compared with fossil fuels but solar farming can have environmental impacts especially during construction and development. Thus, in order to enhance environmental sustainability, it is imperative to understand the environmental impacts of utility-scale solar energy (USSE) plants. During recent decades, remote sensing techniques and geographic information systems have become standard techniques in environmental applications. In this study, the environmental impacts of USSE plants are investigated by analyzing changes to land surface characteristics using remote sensing. The surface characteristics studied include land cover, land surface temperature, and hydrological response whereas changes are mapped by comparing …

Evaluating Relevance And Reliability Of Twitter Data For Risk Communication, Xiaohui Liu

Dissertations

While Twitter has been touted to provide up-to-date information about hazard events, the relevance and reliability of tweets is yet to be tested. This research examined the relevance and reliability of risk information extracted from Twitter during the 2013 Colorado floods using five different approaches. The first approach examined the relationship between tweet volume and precipitation amount. The second approach explored the relationship between geo-tagged tweets and degree of damage. In the third approach, the spatiotemporal distribution of tweets was compared with flood extent. In the fourth approach, risk information from tweets were compared with survey responses obtained in a …

Experiences And Perceptions Of Human Vulnerability To Climate Change In Calakmul, Mexico, Lisa Green

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

This report explores how residents of Calakmul, Mexico perceive and experience their own vulnerability to climate change, and how these perceptions and experiences are differentiated among communities, households, and individuals. Fifty-five semi-structured interviews in 2013 and 45 follow-up interviews in 2016 provide data on familiarity with climate change and perceived effects of climate-related stressors on livelihood activities, health, and experiences of hunger. We found that coping responses to the effects of climate change often require cash inputs, and communities are differentiated in their experiences of vulnerability, based in part on their access to wage labor and importantly governmental support.

Synthesizing Population For Travel Activity Analysis, Hong Zhuo

Theses and Dissertations

Population synthesis is a fundamental procedure for individual-based modeling in transportation research. The population synthesis generates anonymized individuals with selected social-demographic variables that have similar statistical distributions as that of the samples from the real population. Previous studies on population synthesis focused on generating general-purpose population by fitting the joint distributions of multiple variables to their sampled distributions. In addition to fitting the joint distributions, this study focuses on generating population for travel activity analysis by considering individuals’ travel activity patterns and associated social, economic, and demographic characteristics.

A person’s daily movement is a time-sequence of activities connected by travel …

A Cross-Sectional Exploration Of Household Financial Reactions And Homebuyer Awareness Of Registered Sex Offenders In A Rural, Suburban, And Urban County., John Charles Navarro

Electronic Theses and Dissertations

As stigmatized persons, registered sex offenders betoken instability in communities. Depressed home sale values are associated with the presence of registered sex offenders even though the public is largely unaware of the presence of registered sex offenders. Using a spatial multilevel approach, the current study examines the role registered sex offenders influence sale values of homes sold in 2015 for three U.S. counties (rural, suburban, and urban) located in Illinois and Kentucky within the social disorganization framework. Homebuyers were surveyed to examine whether awareness of local registered sex offenders and the homebuyer’s community type operate as moderators between home selling …

The Geography Of Glaciers And Perennial Snowfields In The American West, Andrew G. Fountain, Bryce Glenn, Hassan J. Basagic

Geology Faculty Publications and Presentations

A comprehensive mid-20th century inventory of glaciers and perennial snowfields (G&PS) was compiled for the American West, west of the 100° meridian. The inventory was derived from U.S. Geological Survey 1:24,000 topographic maps based on aerial photographs acquired during 35 years, 1955–1990, of which the first 20 years or more was a cool period with little glacier change. The mapped features were filtered for those greater than 0.01 km². Results show that 5036 G&PS (672 km², 14 km³) populate eight states, of which about 1276 (554 km^2, 12 km³) are glaciers. …

Uas As An Inventory Tool: A Photogrammetric Approach To Volume Estimation, Richard Kramer Rhodes

Graduate Theses and Dissertations

Unmanned aircraft systems (UAS), also referred to as unmanned aerial vehicles (UAV) or remotely piloted vehicles (RPV), are associated with unmanned aircraft either controlled by a pilot on the ground or pre-programmed with specific flight paths. Small UASs have seen a massive increase in public interest in recent years as hobbyist platforms; they are, however, a potentially powerful tool in remote sensing and geospatial applications. Due to the increased availability of low-cost UAS, this technology could soon revolutionize many industries, including those that require volumetric estimation. Traditionally volumetric inventories have been performed with tape measurements, and in some instances where …

Swedish Social Welfare And Its Application To American Welfare Systems, Ben Wilson Galloway

Graduate Theses and Dissertations

Swedish Social Welfare and its Application to American Welfare Systems concerns itself with the issue of determining the origins of the modern Swedish social welfare system. Additionally, the causes behind the formation of the system are evaluated for their relevancy concerning the formation of the American welfare system. Multiple areas of study are considered, including racial impacts, economic factors, sociological impactors, and demographic variables.

Modeling Ozark Caves With Structure-From-Motion Photogrammetry: An Assessment Of Stand-Alone Photogrammetry For 3-Dimensional Cave Survey, Joseph H. Jordan

Graduate Theses and Dissertations

Nearly all aspects of karst science and management begin with a map. Yet despite this fact, cave survey is largely conducted in the same archaic way that is has been for years - with a compass, tape measure, and a sketchpad. Traditional cave survey can establish accurate survey lines quickly. However, passage walls, ledges, profiles, and cross-sections are time intensive and ultimately rely on the sketcher’s experience at interpretively hand drawing these features between survey stations.

This project endeavors to experiment with photogrammetry as a method of improving on traditional cave survey, while also avoiding some of the major pitfalls …

Pemodelan Kejadian Banjir Daerah Aliran Sungai Ciliwung Hulu Dengan Menggunakan Data Radar, Sepanie Putiamini, Eko Kusratmoko, Fadli Syamsudin

Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments)

. This study reports the applicability of hydrological modeling, HEC-HMS, integrated with Geographic Information Systems (GIS) to examine the rainfall - runoff relationship with a case study of Upper Ciliwung watershed. Spatial rainfall data derived from radar data used in the process of simulating rainfall - runoff and the results are compared with simulation results using the observed rainfall data. Analysis of the rainfall-runoff simulation was conducted based on spatial approach by comparing the differences and similarities between sub catchments. The simulations carried out for the flood events in 2002, 2007 and 2013. The results of the simulation of rainfall …

Peranan Penginderaan Jauh Dalam Menyokong Kajian Pemetaan Batas Wilayah Darat (Studi Kasus: Desa Baturetno, Kecamatan Banguntapan, Kabupaten Bantul, Diy), A G. Ahmad

Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments)

Border mapping is an activity which could be done continuously as the region develops. Many kinds of methods in border mapping have been done, and each has strength and weakness. Technology of remote sensing which continues to develop can be used to optimize border mapping to be more efficient. Remote sensing is one of the way to know the condition of earth surface, which in border mapping uses high resolution image, Quickbird image. The spatial accuracy of Quickbird image which reaches 2.4 meters per pixel can be used to monitor land use, to be created into a map which gives …

The Urban Morphology Of Northwest Arkansas: A Geospatial Analysis, Jason Mccollum

Graduate Theses and Dissertations

Research on the impacts of transport infrastructure is limited, and most of it is either focused on

rural areas or on developed areas before modern geospatial technologies were available. This study aimed

to fill this gap in transport research by providing a holistic look at the regional changes that occurred due to

new transport infrastructure construction in Northwest Arkansas between 1980 and 2011.

The National Land Cover Database was used to create a time-series of land cover across the

region between 1992 and 2011. These data were then used to predict future growth in the region.

Additionally, growth patterns of …

Textural Analysis Of Historical Aerial Photography To Determine Change In Coastal Marsh Extent: Site Of The Present-Day Grand Bay National Estuarine Research Reserve (Gbnerr), Mississippi, 1955-2014, Heather Michelle Nicholson

Master's Theses

Coastal marshlands are among the world’s most highly productive ecosystems but they have diminished greatly in the past several decades owing to sea-level rise and direct anthropogenic influences. An effective means of quantifying loss or gain in marsh area is through the use of aerial image data, which offers synoptic views of the landscape at decadal-scale sampling frequencies. However, a potential problem with older panchromatic, or black-and-white, imagery is the absence of multispectral information that might be used otherwise in remote identification of vegetation types. Nevertheless, the analysis of horizontal variability in image brightness values, or image texture, can be …

The Bicycle, The Unsuitable Substitute:A Feasibility Study Based In Fayetteville, Ar Using A Bicycle As A Year-Round Replacement For An Automobile, Jamey Voorhees

Graduate Theses and Dissertations

Can a bicycle can be used in place of an automobile for everyday transportation and commuting needs? Fayetteville, Arkansas is a bicycle friendly and they plan continue to expand the current trail system improve other components in the future. Alternative transportation forms like the bicycle are important but only if bikes are integrated into traffic which needs to be done in some way that all involved understand their place in the system. By actively participating in this system I have attempted to show that a bicycle is just not feasible as a form of daily transportation in a city like …

Emergent Ecologies By Eben Kirksey, Cheryl Lousley

The Goose

Review of Emergent Ecologies by Eben Kirksey.

Believing Is Not The Same As Being Saved By Lisa Martin, Gillian Harding-Russell

The Goose

Review of Lisa Martin's Believing is not the same as Being Saved.

Landscape-Scale Geophysics At Tel Shimron, Jezreel Valley, Israel, Rachel Grap

Electronic Theses and Dissertations

Ground-penetrating radar (GPR) and magnetometry were used at Tel Shimron, an archaeological site in Israel’s Jezreel Valley. GPR primarily measures electric properties while magnetometry measures magnetic properties, making them complementary methods for subsurface prospection. Magnetometry can be collected and processed quickly, making it an ideal landscape-scale reconnaissance tool. It takes more time to collect, process, and interpret GPR data, but the result is a higher resolution dataset. In addition, GPR often works better than magnetometry in desert environments such as the Jezreel Valley. Conventional wisdom suggests that GPR should not be used as a landscape-scale reconnaissance tool unless there is …

Wilayah Rawan Longsor Di Kota Jayapura, Rudolf D. Abrauw

Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments)

Jayapura City is area that located in the north of the island of Papua and dealing directly with the Pacific Plate, so the potential for geological disasters, one of which is a landslide. However, landslides occur not only influenced by the movement of the Pacific Plate (because of occurrences fault / faults), but also a slope that varies from lowlands (0-8%) to the hills (> 45%), lithological and climatic conditions. This study aims to map areas vulnerable to landslides based Geographic Information System (GIS) using two models, namely, [1] the model prediction of landslides Directorate of Volcanology and Geological Hazard …

Variabilitas Curah Hujan Di Kabupaten Kebumen, Satria Indratmoko, Djoko Harmantyo, Eko Kusratmoko

Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments)

Rainfall is highly variable climate elements, either in space or time scale. Variation of this rainfall will have an impact on the determination of the start of the planting of rice plants in particular. Through a statistical calculation and mapping of spatial data, this research will reveal a pattern of early growing season in response to rainfall variability in Kebumen Regency over a period of thirty years, i.e. 1981-2010. Spatial analysis with a reinforced approach statistics reveal that the coastal region in Kebumen Regency have a high rainfall variability with an average of rainfall is low. The higher the variability …