2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/06/2017 | 3:00 PM - 3:15 PM | Monitoring Chlorophyll-a in Lakes Across the United States Using Satellite Remote | 301A
Monitoring Chlorophyll-a in Lakes Across the United States Using Satellite Remote
Synoptic assessment of water quality grows more important as eutrophication of aquatic systems increases. Chlorophyll-a serves as a proxy for phytoplankton biomass, an indicator of anthropogenic nutrient stress, and a measure of nuisance algal blooms. However, resource limitations often compromise the completeness and consistency of conventional in situ chlorophyll-a sampling. Given the continuous and ongoing record of satellite imagery across several decades, remote sensing can expand frequency while ensuring consistency throughout time and space. The purpose of this study is to apply the derivation of chlorophyll-a from the Operational Land Imaging (OLI) sensor on the Landsat 8 satellite across U.S. lakes. We identified spatiotemporal matches occurring within a 3-day window between satellite overpass and in situ chlorophyll-a samples from the Water Quality Portal (WQP). WQP serves data collected by over 400 state, federal, local, and tribal groups across the U.S. There were 81,496 in situ samples between 2013 and January 2017, with 7,910 OLI matchups. Comparison of in situ and satellite measurements are presented and evaluated. The intended outcome of this work is to improve eutrophication assessments across the U.S.
- S20 Understanding physical controls on cyanobacteria dominance: toward prediction and prevention
- S07 Conducting freshwater science with open-source, inexpensive technologies
- S27 Advancing Consistency in Ecological Assessments
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Presenters/Authors
Wilson Salls
(), ORISE Fellow, U.S. EPA, salls.wilson@epa.gov;
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Blake Schaeffer
(), U.S. EPA, schaeffer.blake@epa.gov;
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Darryl Keith
(), U.S. EPA, keith.darryl@epa.gov;
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