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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
The Usage Of Band Ratios To Predict Lake Water Quality Parameters Using Sentinel-2 L1c Imagery, Austin Spoor, Ho-Seop Cha
The Usage Of Band Ratios To Predict Lake Water Quality Parameters Using Sentinel-2 L1c Imagery, Austin Spoor, Ho-Seop Cha
International Journal of Geospatial and Environmental Research
Band ratios using remote imagery can be useful for monitoring large bodies of water when high quality imagery is available. Sentinel-2 satellite imagery provides frequent, high-resolution coverage of the globe. This study set out to test the usefulness of existing band ratios for estimating chlorophyll a (CHL-a), dissolved organic carbon (DOC), and turbidity with Sentinel-2 imagery. USGS in-situ data was matched to Sentinel-2 imagery of Beaver Lake, Arkansas taken August 2015 to July 2019 and the dark spectrum fitting (DSF) atmospheric correction method in ACOLITE was applied to generate surface reflectance values. CHL-a was estimated using two …
Scale Mis-Matches When Assessing Chloride Concentration And Corrosiveness Using Statewide Data For Trend Analysis, Rebecca L. Kauten
Scale Mis-Matches When Assessing Chloride Concentration And Corrosiveness Using Statewide Data For Trend Analysis, Rebecca L. Kauten
International Journal of Geospatial and Environmental Research
This study compares chloride concentrations and a series of corrosiveness indexes to determine whether trends in statewide databases appropriately detect local conditions. Chloride concentrations in local, urban streams generally persist at higher levels than what is typical of natural waters. Data collected for statewide water quality assessments are often at a broader geographical scale. Results and subsequent policies may indicate little to no environmental concern, meanwhile degradation at the local scale remains relatively undetected. Pulses of local snowmelt runoff may violate water quality criteria, but long-term trends measured at the statewide scale are in decline. Results highlight the need for …
Estimating Errors: The Politics Of Environmental Impact Assessment Along The Savannah River, Ryan Craig Covington
Estimating Errors: The Politics Of Environmental Impact Assessment Along The Savannah River, Ryan Craig Covington
Theses and Dissertations
In this dissertation research, I investigate three interrelated conflicts which emerged as part of an environmental impact assessment along the Savannah River in the late 1990s: a controversial plan to improve water quality through supplemental oxygen injection; a lengthy struggle over federal funding policies that constrained efforts to address scientific uncertainty; and an entrenched refusal to investigate human health risks from air toxics at the Port of Savannah. In each of these conflicts, I trace the dismantling of controversy, investigating how, and with what effect, the slow and tedious work of building consensus has reshaped the governance of the lower …
Assessing The Impacts Of Climate Change, Urbanization, And Filter Strips On Water Quality Using Swat, Mike Psaris, Heejun Chang
Assessing The Impacts Of Climate Change, Urbanization, And Filter Strips On Water Quality Using Swat, Mike Psaris, Heejun Chang
International Journal of Geospatial and Environmental Research
Precipitation changes and urban growth are two factors altering the state of water quality. Changes in precipitation will alter the amount and timing of flows, and the corresponding sediment and nutrient dynamics. Meanwhile, densification associated with urban growth will create more impervious surfaces which will alter sediment and nutrient loadings. Land and water managers rely on models to develop possible future scenarios and devise management responses to these projected changes. We use the Soil and Water Assessment Tool (SWAT) to assess potential changes in stream flow, sediment, and nutrient loads in two urbanizing watersheds in Northwest Oregon, USA. We evaluate …
Early Summer Dissolved Oxygen Characteristics In Restored Streams In Seoul, Casey Thoenen, Woonsup Choi, Jinmu Choi
Early Summer Dissolved Oxygen Characteristics In Restored Streams In Seoul, Casey Thoenen, Woonsup Choi, Jinmu Choi
Geography Faculty Articles
Abstract : This paper presents an evaluation of stream restoration projects in Seoul with a focus on dissolved oxygen. Five test sites across four streams were measured for dissolved oxygen (DO) in late May to early June in 2012 and compared against a set of minimum and maximum thresholds. Only one test site, Hwarang-cheon, showed measurements below 6 mg/l DO. Towards the upper limit, the Hwarangcheon site was the only tested stream which was not at risk of DO supersaturation. The Danghyeon-cheon site had the highest probability of supersaturation, with DO saturation exceeding 130% expected 86.5% of the time. When …