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A framework to facilitate development and testing of image-based river velocimetry algorithms
Image-based methods have compelling, demonstrated potential for characterizing flow fields in rivers, but algorithms like particle image velocimetry (PIV) must be further tested and improved to enable more effective use of these techniques. This paper presents a framework designed for this exact purpose: Simulating Hydraulics and Images for Velocimetry Evaluation and Refinement (SHIVER). The appro
Authors
Carl J. Legleiter, Paul J. Kinzel
Macroscale controls determine the recovery of river ecosystem productivity following flood disturbances
River ecosystems rely on varied flows, including regular floods, to provide food and habitat for aquatic organisms. However, flows of freshwater are becoming increasingly managed for irrigation, industry, and other human activities, and the frequency of floods is changing. Our study used time-series data of photosynthesis from 143 rivers across the United States and developed a modeling framework
Authors
Heili Lowman, Robert K. Shriver, Robert O. Hall Jr., Judson Harvey, Philip Savoy, Charles Yackulic, Joanna R. Blaszczak
Remote sensing-based 3D assessment of landslides: A review of the data, methods, and applications
Remote sensing (RS) techniques are essential for studying hazardous landslide events because they capture information and monitor sites at scale. They enable analyzing causes and impacts of ongoing events for disaster management. There has been a plethora of work in the literature mostly discussing (1) applications to detect, monitor, and predict landslides using various instruments and image anal
Authors
Hessah Albanwan, Rongjun Qin, Jung-Kuan (Ernie) Liu
Examining the effect of physicochemical and meteorological variables on water quality indicators of harmful algal blooms in a shallow hypereutrophic lake using machine learning techniques
Two independent machine learning techniques, boosted regression trees and artificial neural networks, were used to examine the physicochemical and meteorological variables that affect the seasonal growth and decline of harmful algal blooms (HABs) in a shallow, hypereutrophic lake in southern Oregon. High temporal resolution data collected at four monitoring locations were aggregated into daily tim
Authors
Susan Wherry, Liam N. Schenk
Identifying indicators of polar bear population status
Monitoring trends in large mammal populations is a fundamental component of wildlife management and conservation. However, direct estimates of population size and vital rates of large mammals can be logistically challenging and expensive. Indicators that reflect trends in abundance, therefore, can be valuable tools for supporting population monitoring. Polar bears have a relatively simple life his
Authors
Karyn D. Rode, Ryan R. Wilson, Justin A. Crawford, Lori T. Quakenbush
Multigenerational, indirect exposure to pyrethroids demonstrates potential compensatory response and reduced toxicity at higher salinity in estuarine fish
Estuarine environments are critical to fish species and serve as nurseries for developing embryos and larvae. They also undergo daily fluctuations in salinity and act as filters for pollutants. Additionally, global climate change (GCC) is altering salinity regimes within estuarine systems through changes in precipitation and sea level rise. GCC is also likely to lead to an increased use of insecti
Authors
Sara Hutton, Samreen Siddiqui, Emily Pedersen, Christopher Markgraf, Amelie Segarra, Michelle Hladik, Richard E Connon, Susanne M. Brander
Multiple lines of evidence point to pesticides as stressors affecting invertebrate communities in small streams in five United States regions
Multistressor studies were performed in five regions of the United States to assess the role of pesticides as stressors affecting invertebrate communities in wadable streams. Pesticides and other chemical and physical stressors were measured in 75 to 99 streams per region for 4 weeks, after which invertebrate communities were surveyed (435 total sites). Pesticides were sampled weekly in filtered w
Authors
Lisa H. Nowell, Patrick W. Moran, Ian R. Waite, Travis S. Schmidt, Paul M. Bradley, Barbara J. Mahler, Peter Van Metre
Underwater flashlights: What light can tell us about water quality
Water is essential for life. The particles and dissolved chemicals found in rivers, lakes, and oceans are constantly changing with weather, seasons, and human activities. The substances found in water can be helpful or harmful to humans and other organisms. New technologies allow scientists to use waterproof computers (called sensors) to record the quality of water as it changes throughout the day
Authors
Kevin Alexander Ryan, Douglas A. Burns
A multiscale perspective for improving conservation of Conchos pupfish
Desert spring systems of the American southwest hold high local fish endemism and are ranked among the most threatened ecosystems in the world. The prioritization of conservation resources to protect species living within these arid landscapes requires knowledge of species abundance and distribution. The plight of Conchos pupfish (Cyprinodon eximius) is representative of freshwater fishes the worl
Authors
Lindsey C. Elkins, Matthew Ross Acre, Megan G. Bean, Sarah M. Robertson, Ryan Smith, Joshuah S. Perkin
Evaluating density-weighted connectivity of black bears (Ursus americanus) in Glacier National Park with spatial capture–recapture models
BackgroundImproved understanding of wildlife population connectivity among protected area networks can support effective planning for the persistence of wildlife populations in the face of land use and climate change. Common approaches to estimating connectivity often rely on small samples of individuals without considering the spatial structure of populations, leading to limited understanding of
Authors
Sarah L Carroll, Greta M Schmidt, John S. Waller, Tabitha Graves
Sicklefin Chub (Macrhybopsis meeki) and Sturgeon Chub (M. gelida) temporal and spatial patterns from extant population monitoring and habitat data spanning 23 Years
Sicklefin (Macrhybopsis meeki) and sturgeon chub (M. gelida) historically occurred throughout the Missouri River (MR), in some tributaries, and Mississippi River downstream of the MR. They have been species of U.S. state-level conservation concern and U.S. Endangered Species Act listing candidates since the 1990s. We applied analytical approaches from occupancy modeling to correlation to monitorin
Authors
Mark L. Wildhaber, Benjamin M West, Kendell Ray Bennett, Jack Howard May, Janice L. Albers, Nicholas S. Green
Resurvey of cross sections on the Yampa and Little Snake Rivers in Lily and Deerlodge Parks, Colorado
Resurveys of seven geomorphologic cross sections located in the Lily Park and Deerlodge Park, Colorado, reaches of the Yampa and Little Snake Rivers were conducted in October 2017. These cross sections extend from Lily Park, at the confluence of the two rivers, to Deerlodge Park within Dinosaur National Monument. Four cross sections were first surveyed in 1983 and then resurveyed in 1997. The rema
Authors
Ronald E. Griffiths, David J. Topping, Christina Leonard, Joel A. Unema