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Articles 4471 - 4500 of 51888
Full-Text Articles in Environmental Sciences
Extreme Precipitation Climatology Of The Contiguous U.S., Amy M. Johnson
Extreme Precipitation Climatology Of The Contiguous U.S., Amy M. Johnson
Student Research Symposium
Extreme precipitation can cause flooding, landslides, loss of life and assets. Across the Contiguous United States (CONUS), concurrent to global warming, many communities have experienced increases in the amount of rain falling during the most extreme precipitation events and climate models project further increases for most of the CONUS. There is a need to comprehensively study the extreme precipitation climatology across the CONUS to understand what is within the observed range of extreme precipitation and the weather that drives it. Modern Era Retrospective analysis for Research and Applications 2 (MERRA-2) atmospheric reanalysis data for the period of 1980-2023 is used …
Beavers Beyond Boundaries: Perceptions Of Beaver-Related Restoration, Matthew V. Guziejka
Beavers Beyond Boundaries: Perceptions Of Beaver-Related Restoration, Matthew V. Guziejka
Student Research Symposium
The study "Beavers Beyond Boundaries: Perceptions of Beaver-Related Restoration" conducted by Matt Guziejka and Heejun Chang from the WISE Lab, Department of Geography at Portland State University, delves into the social, cultural, and environmental dimensions of Beaver-Related Restoration (BRR) within the urban setting of the Tualatin River watershed. Utilizing a voluntary survey with 187 participants across three urban watershed sites, the research aimed to analyze community perceptions concerning beavers and their impact on the environment, particularly in relation to their proximity to watercourses. Findings indicate that proximity significantly affects attitudes towards beavers, with those living closer to watercourses demonstrating more …
Wildland Urban Interface Growth And Development Potentials In Deschutes County, Samantha Hall
Wildland Urban Interface Growth And Development Potentials In Deschutes County, Samantha Hall
Student Research Symposium
Policy can and has been used as a tool to reduce the risk communities experience from natural hazards by limiting development in areas most vulnerable. How and where development occurs directly influences the amount of risk a community experiences from natural hazards like hurricanes, earthquakes, flash floods, and wildfire among others. Development patterns that contribute to increased wildfire risk mostly occur within the wildland urban interface, a land use type where development is at the fringes or intercept of wildland areas and is more flammable due to surrounding vegetation, slope, local climate, and other factors. For this research, Deschutes County …
Method Validation Of Metals In Environmental Soil Samples, Sofia Deangelis, Nana Nguyen
Method Validation Of Metals In Environmental Soil Samples, Sofia Deangelis, Nana Nguyen
Student Research Symposium
Vehicles are a major source of metal accumulation in terrestrial environments. Green infrastructure, such as bioswales, has been implemented as a way to mitigate this damage. However, there is a limited understanding of the processes that occur in these bioswales as few go back after implementation to identify areas in the bioswale with accumulation of pollutants. Inductively coupled mass spectrometry (ICP-MS) has the potential to be used in this type of study due to the machine’s high sensitivity and selectivity. However complications can arise while using the ICP-MS to characterize complex environmental samples. This study seeks to optimize microwave assisted …
Recovery Of Black Carbon Concentrations In Burned Forests, Monica V. Zapata Villegas, Kelly E. Gleason
Recovery Of Black Carbon Concentrations In Burned Forests, Monica V. Zapata Villegas, Kelly E. Gleason
Student Research Symposium
Forest fires shed light absorbing particles (LAP), such as black carbon and burned woody debris, into snowpacks, darkening snow surface albedo, and advancing snowmelt timing and snow disappearance patterns for decades following fire. Although the role of LAPs in seasonal snow has been extensively studied in recent years, the spatiotemporal variability of LAPs and contributions to snowmelt relative to years since fire and burn severity is still unknown. In the Triple Divide region of western Wyoming, the headwaters of the Colorado, Columbia, and Missouri rivers, we quantified the spatiotemporal variability of forest fire effects on snow albedo, using geochemical analysis …
The Influence Of Soil Composition On Stormwater Retention And Runoff In Green Roofs At Portland State, Manuel Edrozo, Lily Green, Mitchell Mcdonald, Nicholas Olmos
The Influence Of Soil Composition On Stormwater Retention And Runoff In Green Roofs At Portland State, Manuel Edrozo, Lily Green, Mitchell Mcdonald, Nicholas Olmos
Student Research Symposium
The purpose of this study is to determine what soil composition is best for green roofs at Portland State; we aim to compare the current soil to the original substrate, to measure which composition retains the most water, and which filters out the most pollutants in stormwater runoff. Five different soil compositions were tested — original, current, layered mixed, solid mixed, and potting soils — and 1,000mL of high and low intensity rainfall (in/hr) was simulated for each of the mixtures. Water was allowed to filter through the soils for a predetermined time (10min for a high application rate and …
Multiscale Variability Of Heavy Metals In A Western U.S. Snowpack, Kelsey Hefner
Multiscale Variability Of Heavy Metals In A Western U.S. Snowpack, Kelsey Hefner
Student Research Symposium
Natural and anthropogenically sourced particulates are deposited from the atmosphere to landscapes via dry and wet deposition, making frozen winter snowpack a natural archive of atmospheric elemental composition. Wildfires in the Western United States are increasing in extent, duration, and severity, especially in alpine regions. Severe fires remove forest canopy and can impact how atmospheric elements are dispersed and stored across snow-dominated watersheds. We evaluated Al, V, Cr, Mn, Ni, Cu, As, Zn, Se, Mo, Cd, and Pb concentrations in 394 winter snow core samples. We collected samples in 2019 and 2020 from a chronosequence of eight forests that burned …
Community Responses To Us Regional Clean Hydrogen Hubs, Bethani Turley
Community Responses To Us Regional Clean Hydrogen Hubs, Bethani Turley
Student Research Symposium
In 2023, the Bipartisan Infrastructure Law designated 7 billion dollars to fund regional hydrogen hubs across the US with the goal of kickstarting a utility scale hydrogen economy for the US electric grid. A promising technology in the renewable energy transition, hydrogen can be made from a multitude of energy sources, often designated by colors: green hydrogen is made from solar and wind, pink hydrogen from nuclear, and blue hydrogen from natural gas. This presentation examines this new hydrogen economy through the case study of the Appalachian Regional Clean Hydrogen Hub (ARCH2). ARCH2 is a blue hydrogen hub proposal by …
Revitalizing Turtle Creek Park, Michael Hardyway, Ethan Harm, Abbey Jacoby, Casey Stephenson
Revitalizing Turtle Creek Park, Michael Hardyway, Ethan Harm, Abbey Jacoby, Casey Stephenson
Final Reports in ENST 411: Environmental Community Projects
We current ENST 411 students, Abbey Jacoby, Michael Hardyway, Ethan Harm, and Casey Stephenson have chosen to work with Jim Knight, East Buffalo Township, the Merrill Linn Land and Waterways Conservancy, and many others in an attempt to revitalize Turtle Creek Park for a plethora of reasons. Three of us are majoring in biology, and two are majoring in environmental science, which makes much of the information and techniques relevant in Turtle Creek applicable to our courses of study. This project included heavy hands on work which allowed us students to leave a memorable and impactful influence on the Lewisburg …
Fireflies At Rpa Natural Area Final Report, Olivia H. Bush, Sydney M. Shea, Sofia J. Gordon, Nick S. Wiebke
Fireflies At Rpa Natural Area Final Report, Olivia H. Bush, Sydney M. Shea, Sofia J. Gordon, Nick S. Wiebke
Final Reports in ENST 411: Environmental Community Projects
Our group worked alongside community partners Shaunna Barnhart and Jim Dunn during the Spring 2024 semester to assist with their annual event Fireflies at RPA Natural Area. RPA Natural Area is a local park in South Williamsport, Pennsylvania that was recently acquired by Southside Recreational Authority. Since taking over the park, the organization has begun hosting an event each July to educate the general public about firefly biology and conservation by showing a film and guiding attendees through a firefly tour through the park. Our goals for this project included creating physical educational materials to be used at the park …
A Just, Sustainable Transition At Fordham University, Ethan Shepard
A Just, Sustainable Transition At Fordham University, Ethan Shepard
Student Theses 2015-Present
This paper takes a deeper look at Fordham University’s environmental impact and concludes with a strategy outline that works towards a just, sustainable future on the university campus and surrounding areas. New York City is an area already facing the adverse effects of climate change, and there are several threats that have the potential to cause grave consequences moving forward. Prior to constructing a climate action plan, it is integral to understand the past and present status of The Bronx under a socio-environmental lens. Chapter One focuses on the current status of Fordham’s Rose Hill Campus from a sustainability perspective …
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou), Draft 2024 Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) – Montana Technological University (Prospector Residence Hall) (Dated March 21, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou), Draft Final 2021-2022 Residential Metals Abatement Program – Aware Early Head Start Soil Remedial Action Construction Completion Report (Dated April 26, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) – United Congregational Church (Crayon Academy Preschool) (Dated April 2, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit, Residential Metals Abatement Program Construction Completion Report (Non-Residential Parcels-Indoor Dust) - Butte Career Center/Webster Garfield (Dated March 29, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou), Draft Final 2021 Residential Metals Abatement Program – Head Start (Former Lincoln School) Soil Remedial Action Construction Completion Report (Dated April 26, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Residential Metals Abatement Program (Rmap) – Interior School Dust - Investigation Summary Report – East Middle School (Dated January 16, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Bibliometric Review Of The Landscape And Thematic Structure Of Research On Sustainable Mining In Asean, 1942–2022, Nathatai Janjirawatna, Sirisuhk Rakthin, Philip Hallinger
Bibliometric Review Of The Landscape And Thematic Structure Of Research On Sustainable Mining In Asean, 1942–2022, Nathatai Janjirawatna, Sirisuhk Rakthin, Philip Hallinger
Journal of Sustainable Mining
This bibliometric review addressed the lack of consolidated information on the current state of sustainable mining in the ASEAN region. The review analyzed bibliographic data associated with 539 Scopus-indexed documents on sustainable mining in ASEAN nations published through the end of 2022. Descriptive statistics identified a great disparity in the scope of research on sustainable mining practices across the ASEAN countries. Surprisingly, a significant portion of the extant research on sustainable mining in the region has been authored by scholars from outside of ASEAN. Keyword analyses highlighted several emerging research topics including life cycle assessment, conservation of natural resources, climate …
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 78 – Original Mine Yard., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 49 – Old Glory., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 52 – Moscow Dump., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 45 – Garfield, Mike Mcanulty
Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 45 – Garfield, Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 125 – Child Harold-2 Dump., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 34e – Eveline Dump East., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 74 – West Gagnon Dump., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Re: Butte Priority Soils Operable Unit (Bpsou) Draft Final Insufficiently Reclaimed Sites Field Sampling Plan (Fsp) Bres No. 121 – Travona Dump., Mike Mcanulty
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Major Axes Of Variation In Tree Demography Across Global Forests, Melina De Souza Leite, Sean M. Mcmahon, Paulo Inácio Prado, Stuart J. Davies, Alexandre Adalardo De Oliveira, Hannes P. De Deurwaerder, Salomón Aguilar, Kristina J. Anderson-Teixeira, Nurfarah Aqilah, Norman A. Bourg, Warren Y. Brockelman, Nicolas Castaño, Chia-Hao Chang-Yang, Yu-Yun Chen, George Chuyong, Keith Clay, Álvaro Duque, Sisira Ediriweera, Corneille E. N. Ewango, Gregory Gilbert, I. A. U. N. Gunatilleke, C. V. S. Gunatilleke, Robert Howe, Walter Huaraca Huasco, Akira Itoh, Daniel J. Johnson, David Kenfack, Kamil Král, Yao Tze Leong, James A. Lutz, Jean-Remy Makana, Yadvinder Malhi, William J. Mcshea, Mohizah Mohamad, Musalmah Nasardin, Anuttara Nathalang, Geoffrey Parker, Renan Parmigiani, Rolando Pérez, Richard P. Phillips, Pavel Šamonil, I-Fang Sun, Sylvester Tan, Duncan Thomas, Jill Thompson, María Uriarte, Amy Wolf, Jess Zimmerman, Daniel Zuleta, Marco D. Visser, Lisa Hülsmann
Major Axes Of Variation In Tree Demography Across Global Forests, Melina De Souza Leite, Sean M. Mcmahon, Paulo Inácio Prado, Stuart J. Davies, Alexandre Adalardo De Oliveira, Hannes P. De Deurwaerder, Salomón Aguilar, Kristina J. Anderson-Teixeira, Nurfarah Aqilah, Norman A. Bourg, Warren Y. Brockelman, Nicolas Castaño, Chia-Hao Chang-Yang, Yu-Yun Chen, George Chuyong, Keith Clay, Álvaro Duque, Sisira Ediriweera, Corneille E. N. Ewango, Gregory Gilbert, I. A. U. N. Gunatilleke, C. V. S. Gunatilleke, Robert Howe, Walter Huaraca Huasco, Akira Itoh, Daniel J. Johnson, David Kenfack, Kamil Král, Yao Tze Leong, James A. Lutz, Jean-Remy Makana, Yadvinder Malhi, William J. Mcshea, Mohizah Mohamad, Musalmah Nasardin, Anuttara Nathalang, Geoffrey Parker, Renan Parmigiani, Rolando Pérez, Richard P. Phillips, Pavel Šamonil, I-Fang Sun, Sylvester Tan, Duncan Thomas, Jill Thompson, María Uriarte, Amy Wolf, Jess Zimmerman, Daniel Zuleta, Marco D. Visser, Lisa Hülsmann
Wildland Resources Faculty Publications
The future trajectory of global forests is closely intertwined with tree demography, and a major fundamental goal in ecology is to understand the key mechanisms governing spatio-temporal patterns in tree population dynamics. While previous research has made substantial progress in identifying the mechanisms individually, their relative importance among forests remains unclear mainly due to practical limitations. One approach to overcome these limitations is to group mechanisms according to their shared effects on the variability of tree vital rates and quantify patterns therein. We developed a conceptual and statistical framework (variance partitioning of Bayesian multilevel models) that attributes the variability in …
Effects Of Urbanization On Eutrophication Parameters In Three Tidal Creeks, Ella Swantek
Effects Of Urbanization On Eutrophication Parameters In Three Tidal Creeks, Ella Swantek
Honors Theses
Marshes and swashes are vital environments as a controlling barrier between land affected by various pollutants and the ocean. Eutrophication and the effects of this process can be detrimental for the areas experiencing it. I am interested in ways areas that have little contact with human interactions compare to areas that are heavily urbanized, and whether either of these locations is at a higher risk for eutrophication. Using spectrophotometry and fluorometry, I analyzed samples collected from the relatively undeveloped and restricted-access locations of Waities Island Beach and Dunn Sound monthly for dissolved nutrients, and chlorophyll. At the time of sampling, …
Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) 2024 Draft Final Insufficiently Reclaimed Areas Quality Assurance Project Plan (Qapp) (Dated March 8, 2024), Molly Roby
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites Field Sampling Plan (Fsp) Package #11: Ur-49 And Ur-50, Atlantic Richfield Company
Butte Priority Soils Operable Unit (Bpsou) Draft Final Unreclaimed Sites Field Sampling Plan (Fsp) Package #11: Ur-49 And Ur-50, Atlantic Richfield Company
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.