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Full-Text Articles in Geography
Using Gis-Based Spatial Analysis To Determine Urban Greenspace Accessibility For Different Racial Groups In The Backdrop Of Covid-19: A Case Study Of Four Us Cities, Arun K. Pallathadka, Laxemi Pallathadka, Sneha Rao, Heejun Chang, Dorn Van Dommelen
Using Gis-Based Spatial Analysis To Determine Urban Greenspace Accessibility For Different Racial Groups In The Backdrop Of Covid-19: A Case Study Of Four Us Cities, Arun K. Pallathadka, Laxemi Pallathadka, Sneha Rao, Heejun Chang, Dorn Van Dommelen
Geography Faculty Publications and Presentations
As the United States leads COVID-19 cases on global charts, its spatial distribution pattern offers a unique opportunity for studying the social and ecological factors that contribute to the pandemic’s scale and size. We use a GIS-data-based approach to evaluate four American cities—Anchorage (Alaska), Atlanta (Georgia), Phoenix (Arizona), and Portland (Oregon) characterized by the significant composition of different racial and ethnic group populations. Building upon previous studies that investigated urban spatial inequalities using the environmental justice framework, we examine: (1) the relative racial vulnerability of Census Block Groups (CBG) and ZIP Code Tabulation Areas (ZCTA) to COVID-19 (2) green space …
Spatial Analysis Of Landscape And Sociodemographic Factors Associated With Green Stormwater Infrastructure Distribution In Baltimore, Maryland And Portland, Oregon, Ashley Baker, Emma Brenneman, Heejun Chang, Lauren Mcphillips, Marissa Matsler
Spatial Analysis Of Landscape And Sociodemographic Factors Associated With Green Stormwater Infrastructure Distribution In Baltimore, Maryland And Portland, Oregon, Ashley Baker, Emma Brenneman, Heejun Chang, Lauren Mcphillips, Marissa Matsler
Geography Faculty Publications and Presentations
This study explores the spatial distribution of green stormwater infrastructure (GSI) relative to sociodemographic and landscape characteristics in Portland, OR, and Baltimore, MD, USA at census block group (CBG) and census tract scales. GSI density is clustered in Portland, while it is randomly distributed over space in Baltimore. Variables that exhibit relationships with GSI density are varied over space, as well as between cities. In Baltimore, GSI density is significantly associated with presence of green space (+), impervious surface coverage (+), and population density (−) at the CBG scale; though these relationships vary over space. At the census tract scale …
Evaluating User Interaction With A Web-Based Group Decision Support System: A Comparison Between Two Clustering Methods, Martin Swobodzinski, Piotr Jankowski
Evaluating User Interaction With A Web-Based Group Decision Support System: A Comparison Between Two Clustering Methods, Martin Swobodzinski, Piotr Jankowski
Geography Faculty Publications and Presentations
Task-Technology Fit theory and the Technology Acceptance Model identify system utilization as an important indicator for the performance of complex software systems. Yet, empirical evaluations of user interaction with group decision support systems are scarce and often methodologically underdeveloped. For this study we employed an exploratory evaluation of user interaction in the context of web-based group decision support systems. Specifically, we used information-rich server logs captured through a web-based platform for participatory transportation planning to identify groups of users with similar use patterns. The groups were derived through multiple sequence alignment and hierarchical cluster analysis based on varying user activity …
Hydrologic Impacts Of Climate Change In The Upper Clackamas River Basin, Oregon, Usa, David Graves, Heejun Chang
Hydrologic Impacts Of Climate Change In The Upper Clackamas River Basin, Oregon, Usa, David Graves, Heejun Chang
Geography Faculty Publications and Presentations
The Pacific Northwest of the USA is dependent on seasonal snowmelt for water resources that support its economy and aquatic ecosystems. Increased temperatures resulting from higher concentrations of atmospheric greenhouse gases may cause disruptions to these resources because of reductions in the annual snowpack and the earlier occurrence of seasonal snowmelt. We applied a Geographic Information System (GIS)-based distributed hydrologic model at a monthly scale to assess the effects of future climate change on runoff from the Upper Clackamas River Basin (UCB; located near Portland, Oregon, USA). Once validated using historic flow data, the model was run for 2 future …