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Susannah O Erwin

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Data set contains depth and velocity grids centerpoints generated from hydrodynamic model (SRH-2D) simulations run for a range of discharges. Date range corresponds to month(s) that bathymetric survey was performed. Three study reaches were considered in this analysis: the Fairview reach of the Yellowstone River, MT, the Miami and Lisbon-Jameson reaches of the Lower Missouir River. Data and application are described in detail in accompanying journal article (Erwin et al., 2017).
Data were collected in June 2016 as part of a dye-trace experiment in the Missouri River downstream from Fort Peck Dam, Montana, USA. Fluorometers were deployed at 8 measurement stations over a 135-km study reach. Approximately 51 L of Rhodamine WT (RWT) dye was injected on 26 June 2016 at 14:30 MDT. The injection occured along a transect located approximately 3000 meters downstream from the confluence of the Milk and Missouri Rivers. Injection was performed via a gravity-feed system and was complete within seven minutes of initaition. RWT dye was diluted by at least half to facilitate mixing and was injected approximately 0.30 m below the water surface. Fluorometers were placed approximately 4 to 8 m from shore...
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Data set contains depth and velocity grids centerpoints generated from hydrodynamic model (SRH-2D) simulations run for a range of discharges. Date range corresponds to month(s) that bathymetric survey was performed. Three study reaches were considered in this analysis: the Fairview reach of the Yellowstone River, MT, the Miami and Lisbon-Jameson reaches of the Lower Missouir River. Data and application are described in detail in accompanying journal article (Erwin et al., 2017).
Pebble counts were performed to assess the bed surface grain size distribution at different habitats within a reach of the Big River near Washington State Park, Missouri. These data were collected in support of research assessing the hydraulic conditions of freshwater mussel habitat in the Big River. One component of this investigation was to examine the theoretical stability and instability of sediment particle sizes that are present within mussel habitats as well as within nearby reference habitats. These pebble counts furnished grain size data used for reference sediment stability predictions. Pebble counts were performed at seven different habitats in a study reach on the Big River following the methods of Wolman...
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This child data release includes hyperspectral and RGB images acquired from an Unmanned Aircraft System (UAS) during an experiment performed at the USGS Columbia Environmental Research Center, near Columbia, Missouri, on April 2, 2019. The purpose of the experiment was to assess the feasibility of inferring concentrations of a visible dye (Rhodamine WT) tracer from various types of remotely sensed data in water with varying levels of turbidity. Whereas previous research on remote sensing of tracer dye concentrations has focused on clear-flowing streams, the Missouri River is much more turbid and the reflectance signal associated with the sediment-laden water could obscure that related to the presence and amount...
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