A5079562446- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Climate change and permafrost
- Atmospheric and Environmental Gas Dynamics
- Soil erosion and sediment transport
- Methane Hydrates and Related Phenomena
- Fish Ecology and Management Studies
- Arctic and Antarctic ice dynamics
- Remote Sensing and LiDAR Applications
- Water Quality Monitoring Technologies
- Peatlands and Wetlands Ecology
- Cryospheric studies and observations
- Coastal and Marine Dynamics
- Underwater Acoustics Research
- Underwater Vehicles and Communication Systems
- Remote-Sensing Image Classification
- Diverse Educational Innovations Studies
- Remote Sensing in Agriculture
- Air Traffic Management and Optimization
- Fire effects on ecosystems
- UAV Applications and Optimization
- Oil Spill Detection and Mitigation
- Geography Education and Pedagogy
- Automated Road and Building Extraction
University of North Carolina at Chapel Hill
2019-2024
University of Massachusetts Amherst
2024
The Ohio State University
2019
Abstract Riverbank migration has historically been seen as a risk to infrastructure that can be combated through channelization, bank stabilization, and sediment trapping. The physical processes involved with riverbank erosion deposition are well defined, yet the solutions equations describe these computationally data intensive over large domains. While current understanding of large‐scale river channel mobility largely comes from reach‐ watershed‐scale observations, we need global...
Abstract To help store water, facilitate navigation, generate energy, mitigate floods, and support industrial agricultural production, people have built continue to build obstructions natural flow in rivers. However, due the long complex history of constructing removing such obstructions, we lack a globally consistent record their locations types. Here, used method visually locate classify on 2.1 million km large rivers (width ≥30 m) globally. We based our mapping Google Earth Engine’s high...
Abstract Areas of lakes that support emergent aquatic vegetation emit disproportionately more methane than open water but are under‐represented in upscaled estimates lake greenhouse gas emissions. These shallow areas typically less ∼1.5 m deep and can be detected with synthetic aperture radar (SAR). To assess the importance (LEV) zones to landscape‐scale emissions, we combine airborne SAR mapping field measurements vegetated open‐water flux. First, use Uninhabited Aerial Vehicle data from...
The airborne AirSWOT instrument suite, consisting of an interferometric Ka-band synthetic aperture radar and color-infrared (CIR) camera, was deployed to northern North America in July August 2017 as part the NASA Arctic-Boreal Vulnerability Experiment (ABoVE). We present validated, open (i.e., vegetation-free) surface water masks produced from high-resolution (1 m), co-registered CIR imagery using a semi-automated, object-based classification. resulting are available open-access datasets...
Abstract Over the past decade, remote sensing data have improved in resolution and become more widely available, bringing new opportunities for its use environmental science conservation. One potential application is to identify map instream infrastructure across world, with important implications fisheries, hydrology, flooding, more. To date, databases of focus on larger dams reservoirs that are comparatively easy detect remotely sensed imagery. Despite their impact freshwater ecosystems,...
Abstract Satellite imagery provides a global perspective for studying river hydrology and water quality, but clouds remain fundamental limitation of optical sensors. Explicit studies this problem were limited to specific locations or regions. In study, we characterize the severity by analyzing 22 years daily satellite cloud cover data modeled discharge sample 21,642 reaches diverse sizes climates. Our results show that bias in observed is highly organized space, particularly affecting...
Existing publicly available digital elevation models (DEMs) provide global-scale data but are often not precise enough for studying processes that depend on small-scale topographic features in rivers. For example, slope breaks and knickpoints rivers can be important understanding tectonic processes, riffle-pool structures drivers of riverine ecology. More (e.g. lidar) some areas, their spatial extent limits large-scale research. The upcoming Surface Water Ocean Topography (SWOT) satellite...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Surface. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Global Observations Riverbank Erosion Accretion from Landsat ImageryAuthorsTheodoreLanghorstiDTamlin MPavelskyiDSee all authors Theodore LanghorstiDCorresponding...
Abstract Optical backscatter sensors (OBSs) are commonly used to measure the turbidity, or light obscuration, of water in fresh and marine environments various industrial applications. These turbidity data calibrated yield total suspended solids (TSS) sediment concentration (SSC) measurements for quality, transport, diverse other research environmental management Commercial generally cost > $1000–3000. Here we leveraged simple, low‐cost microprocessors, electronics, housing components...
To advance monitoring of surface water resources, new remote sensing technologies including the forthcoming Surface Water and Ocean Topography (SWOT) satellite (expected launch 2022) its experimental airborne prototype AirSWOT are being developed to repeatedly map elevation (WSE) slope (WSS) world’s rivers, lakes, reservoirs. However, vertical accuracies these novel largely unverified; thus, standard repeatable field procedures validate remotely sensed WSE WSS needed. that end, we designed,...
Abstract Avulsions change river courses and transport water sediment to new channels impacting infrastructure, floodplain evolution, ecosystems. Abrupt avulsion events (occurring over days weeks) are potentially catastrophic society thus receive more attention than slow avulsions, which develop decades centuries can be challenging identify. Here, we examine gradual channel changes of the Peace‐Athabasca River Delta (PAD), Canada using in situ measurements 37 years Landsat satellite imagery....
Abstract In situ river discharge estimation is a critical component of studying rivers. A dominant method for establishing monitoring in temporary gauge, which uses rating curve to relate stage discharge. However, this approach constrained by cost and the time develop stage‐discharge curve, as curves rely on numerous flow measurements at high low stages. Here, we offer novel alternative traditional gauges: estimating Discharge via Arrays Pressure Transducers (DAPT). DAPT Bayesian algorithm...
In late 2023 the Surface Water and Ocean Topography (SWOT) satellite mission will release unprecedented high-resolution measurements of water surface elevation (WSE) slope (WSS) globally. SWOT's exciting Ka-band near-nadir wide-swath interferometric radar (InSAR) technology could transform studies hydrology, but remains highly experimental. We examine Airborne SWOT (AirSWOT) data acquired twice over Canada's Peace-Athabasca Delta (PAD), a large, low-gradient, ecologically important riverine...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Biogeosciences. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v3]The Importance Lake Emergent Aquatic Vegetation Estimating Arctic-Boreal Methane EmissionsAuthorsEthanKyzivatiDLaurenceSmithiDFenixGarcia...
Abstract Open-source designs for turbidity and depth sensors are becoming increasingly capable available, but the knowledge required to construct them limits their use compared expensive, commercial sensors. Here, we present an open-source optical backscatter water pressure sensor that can be ordered almost fully assembled, requires no coding deploy, costs approximately $50 USD. We share three examples of these sensors’ ability facilitate new research. First, observed complex changes in...
Earth and Space Science Open Archive This work has been accepted for publication in Water Resources Research. Version of RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Mapping flow-obstructing structures on global riversAuthorsXiaoYangiDTamlin MPavelskyiDMatthew Richard VossRossiDStephanie RJanuchowski-HartleyiDWayanaDolaniDElizabeth...
Fluvial sediment transport is an important component of the global budget, yet in-situ monitoring limited. Researchers and practitioners employ various methods to fill in these gaps, each with their own advantages drawbacks. In this study, we compare four different models for estimating total annual suspended solids daily flux Sagavanirktok River Alaska. These include: 1) turbidity calibration; 2) WBMsed estimates 3) optical remote sensing random forest model; 4) Long-short term memory...
Through the Sediment, Ice, & Learning on Tanana (SILT) project, a team of university scientists engaged two middle school student groups in testing innovative environmental research technologies to measure sediment flowing underneath river ice. The culturally responsive, place-based pilot program tests these as strategy increase students' science interest and self-efficacy. Over series three workshops, 39 students built deployed low-cost turbidity sensors ice designed model payload...