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Acoustic backscatter - Data and Python Code These data were compiled for investigating the relationship between acoustic backscattering by riverbeds composed of various riverbed substrates (bed sediment), and for developing and testing a probabilistic model for substrate classification based on high-frequency multibeam acoustic backscatter. The model is described in Buscombe et al. (2017). The data consist of various quantities on coincident grids, from various sites along the Colorado River in Grand Canyon, including water depth, bed roughness, the area (or footprint) of the acoustic beam, unfiltered and filtered backscatter magnitude, sediment classification (for each location, 1 of 5 sediment classes in a categorical scheme), and the probabilities for... Categories: Data; Tags: Arizona, Colorado River, Geography, Geomorphology, Glen Canyon, All tags... Grand Canyon, Information Sciences, Marble Canyon, Remote Sensing, Southwestern United States, USGS Science Data Catalog (SDC), United States, acoustic remote sensing, ecogeomorphology, fluvial geomorphology, fluvial sediment transport, multibeam backscatter, probabilistic modeling, seafloor mapping, stochastic modeling, submerged aquatic vegetation, substrate mapping, Fewer tags Threshold friction velocities for aeolian transport of river-sourced sand, with related moisture content, grain size, topographic, and wind data from Lees Ferry, Arizona These data were compiled to investigate the control of drying on the aeolian transport of river-sourced sand. Objectives of our study were to to examine aeolian sediment transport during a five-day period of low steady river flow on a river sandbar and adjacent aeolian dunefield. These data represent the observed and theoretical threshold fiction velocities for aeolian sediment transport, as well as the grain size, sediment moisture content, surface roughness and other characteristics of the sandbar and sand dune surfaces. These data were collected at a sandbar and aeolian sand dune along the Colorado River approximately 19 km downstream from Glen Canyon Dam at Lees Ferry, Arizona, USA from March 15 to 20, 2021.... Categories: Data; Tags: Arizona, Climatology, Colorado River, Ecology, Geography, All tags... Geomorphology, Glen Canyon, Glen Canyon Dam, Grand Canyon, Hydrology, Information Sciences, Lake Mead, Lake Powell, Lees Ferry, Marble Canyon, Remote Sensing, Sedimentology, USGS Science Data Catalog (SDC), aeolian, aeolian sediment transport, climatologyMeteorologyAtmosphere, data release, dune, elevation, environment, fluvial, geoscientificInformation, grain size, inlandWaters, lidar, location, modeling, observed threshold fiction velocities, river ecosystems, river systems, river-sourced sandsand, sand deposits, sand dune, sandbar, sediment, sediment moisture content, soil moisture, streamflow, surface roughness, theoretical threshold fiction velocities, unconsolidated deposits, wind, wind, wind erosion, wind speeds, Fewer tags Predicted recreation economics under different management scenarios for Lake Powell releases These data were compiled to predict economic impacts to angling in Glen Canyon and whitewater rafting in Grand Canyon. The objective of our study was to estimate recreation impacts, or changes in consumer surplus, under different future Interim Guidelines sEIS and LTEMP sEIS alternatives. These data include monthly impacts in nominal 2022 dollars. These data were created for operations at Glen Canyon Dam for October 2023 through November 2027. These data were created by the U.S. Geological Survey, Southwest Biological Science Center, Grand Canyon Monitoring and Research Center using mathematical modeling methods. Categories: Data; Tags: Arizona, Colorado River, Geography, Glen Canyon, Glen Canyon Dam, All tags... Grand Canyon, Hydrology, Information Sciences, Marble Canyon, USGS Science Data Catalog (SDC), Water Resources, angling, business and economics, consumer surplus, data release, economic value, economy, freshwater ecosystems, inland fishery resources, inlandWaters, rafting, recreation, recreational fishery resources, regulated river, river systems, sport fishing, whitewater, Fewer tags Gross primary production estimates and associated light, sediment, and water quality data from the Colorado River below Glen Canyon Dam These data were compiled to model the effects of flow regime and bed grain size distributions on rates of gross primary production (GPP) in the Colorado River below Glen Canyon Dam, AZ, USA. The objectives of our study were to quantify daily and weekly scale effects of an experimental flow regime on GPP in the Colorado River. The experimental flow was conducted at Glen Canyon Dam from May-August in 2018, 2019, and 2020 and contrasted steady-low flows on weekend days with business-as-usual hydropeaking flows during weekdays. This data release only contains data through 2019. These data represent daily-scale estimates of GPP, discharge, turbidity, water depth, and canyon shading for eleven reaches on the Colorado... Categories: Data; Tags: Aquatic Biology, Arizona, Colorado River, Ecology, Geochemistry, All tags... Geography, Glen Canyon, Glen Canyon Dam, Grand Canyon, Grand Canyon National Park, Hydrology, Information Sciences, Limnology, Marble Canyon, Sedimentology, USGS Science Data Catalog (SDC), USGS gage, Water Quality, Water Resources, bed grain size distributions, canyon shading, data release, discharge, dissolved gases, environment, experimental flow regime, field inventory and monitoring, flow regime, gas transfer, grain-size analysis, gross primary production, hydropeaking flows, inlandWaters, light attenuation, northern Arizona, sediment transport, stream discharge, stream-gage measurement, streamflow, surface water quality, turbidity, water depth, water quality, water resources, water sampling, water-quality data, weekly mean discharge, weekly mean gamma, Fewer tags Spatial polygon footprint for the 105 aerial imagery tiles and 7 zones - 2021 In May 2021, the Grand Canyon Monitoring and Research Center (GCMRC) of the U.S. Geological Survey’s (USGS), Southwest Biological Science Center (SBSC) acquired airborne multispectral high resolution data for the Colorado River in Grand Canyon in Arizona, USA. The imagery data consist of four bands (Band 1 – red, Band 2 – green, Band 3 – blue, and Band 4 – near infrared) with a ground resolution of 20 centimeters (cm). These image data are available to the public as 16-bit GeoTIFF files, which can be read and used by most geographic information system (GIS) and image-processing software. The spatial reference of the image data are in the State Plane (SP) map projection using the central Arizona zone (FIPS 0202)... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Arizona, Bright Angel Creek, Colorado River, Diamond Creek, ESRI shapefile, All tags... Glen Canyon Dam, Grand Canyon, Havasu Creek, Kanab Creek, Lake Mead, Lake Powell, Lees Ferry, Little Colorado River, Marble Canyon, Page, Paria River, Peach Springs, Pearce Ferry, Shinumo Creek, Tapeats Creek, United States, data release, geographic information systems, geospatial datasets, image mosaics, imageryBaseMapsEarthCover, study areas, Fewer tags Horizontal accuracy assessment and shadow locations data In May 2021, the Grand Canyon Monitoring and Research Center (GCMRC) of the U.S. Geological Survey’s (USGS), Southwest Biological Science Center (SBSC) acquired airborne multispectral high resolution data for the Colorado River in Grand Canyon in Arizona, USA. The imagery data consist of four bands (Band 1 – red, Band 2 – green, Band 3 – blue, and Band 4 – near infrared) with a ground resolution of 20 centimeters (cm). These image data are available to the public as 16-bit GeoTIFF files, which can be read and used by most geographic information system (GIS) and image-processing software. The spatial reference of the image data are in the State Plane (SP) map projection using the central Arizona zone (FIPS 0202)... Categories: Data; Tags: Arizona, Bright Angel Creek, Colorado River, Diamond Creek, GeoTIFF, All tags... Glen Canyon Dam, Grand Canyon, Havasu Creek, Kanab Creek, Lake Mead, Lake Powell, Lees Ferry, Leica ADS80/82, Little Colorado River, Marble Canyon, Page, Paria River, Peach Springs, Pearce Ferry, Shinumo Creek, Tapeats Creek, United States, aerial photography, airborne imagery, airborne multispectral high resolution data, data release, digital aerial imagery, four band image mosaic, image collections, image mosaics, imageryBaseMapsEarthCover, infrared imaging, multispectral imaging, natural color, near infrared, orthoimagery, remote sensing, Fewer tags