Filters: Tags: Aeolian (X) > Categories: Data (X)

Filters Date Range Past year (3) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Joel B Sankey U.S. Geological Survey Southwest Biological Science Center Joshua J Caster U.S. Geological Survey - ScienceBase More... Tag Types Theme (4) Place (4) USGS Scientific Topic Keyword (3) Harvest Set (3) Tag Schemes None (4) USGS Thesaurus (3) Geographic Names Information System (GNIS) (4) ISO 19115 Topic Categories (3) USGS information products (3) Getty Thesaurus of Geographic Names (1) USGS Metadata Identifier (1) View Results as: JSON ATOM CSV

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 Aerial imagery analysis and topographic change detection (digital surface models), field observations and topographic change (terrestrial lidar surveys), and 4-minute wind speed record data for an aeolian dune field near Lees Ferry, AZ These data were compiled for assessing how geomorphic changes measured as topographic differences from repeat surveys represent measured and modelled estimates of aeolian sediment transport and dune mobility. Objective(s) of our study were to investigate whether topographic changes can serve as a proxy for aeolian transport and sediment mobility in dunefield environments. This was accomplished by relating topographic changes to modeled and observed estimates of sediment transport and dune mobility over months to decades within a partially vegetated dunefield starved of upwind sediment supplies. We specifically tested if topographic changes measured as net and total volume changes and topographic surface roughness... Categories: Data; Tags: Arizona, Colorado River, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, All tags... Lees Ferry, Paria River, UAV imagery, USGS:658efe37d34e3265ab14d2c1, aeolian, aerial photography, bare sand, biocrust sand, biogeography, biological soil crusts, biota, change detection, climatologyMeteorologyAtmosphere, data release, disturbed, dune field, dune mobility, dune surface, elevation, environment, geomorphic change, geomorphology, gravel bar, gravel deposits, image collections, imageryBaseMapsEarthCover, in-field sediment transport data, land use and land cover, land use change, planningCadastre, remote sensing, repeat surveys, sediment transport, topographic differences, topographic surveys, topography, unconsolidated deposits, unoccupied aerial vehicle imagery, vegetated sand, vegetation, wind, wind strength, woody vegetation, Fewer tags Sand classifications along the Colorado River in Grand Canyon derived from 2002, 2009, and 2013 high-resolution multispectral airborne imagery These data are remote sensing image-based classification maps of unvegetated river-derived sand along the Colorado River. One map is based on imagery acquired in May 2013 and is a classification of sand located above the wetted river channel in the imagery which was acquired at the approximate contemporary low-flow river discharge of 8,000 cubic feet per second (227 cubic meters per second) and extends from Glen Canyon Dam at Lake Powell to Separation Canyon at Lake Mead, a total distance of approximately 255 river miles (410 river kilometer). Three other maps are based on imagery acquired in May 2002, 2009, and 2013, respectively, and are classifications of sand located above the wetted river channel (at river... Categories: Data; Tags: Arizona, Colorado River, Diamond Creek, GIS vector data, Geography, All tags... Geomorphology, Glen Canyon, Glen Canyon Dam, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, Information Sciences, Lake Mead, Lake Powell, Lees Ferry, Remote Sensing, Separation Canyon, USGS Science Data Catalog (SDC), aeolian, change detection, classification map, debris fans, eddies, fine sediment, fluvial, high-resolution multispectral airborne imagery, image classification, large sediment deposition zones, management, monitoring, multispectral image analysis, remote sensing, remote sensing image-based classification maps, research, river-derived sand, sand classification, sand distribution, sediment-related resources, supervised image classification, unsupervised image classification, unvegetated river-derived sand, Fewer tags Aeolian and drainage classification data for various archaeological sites in Grand Canyon National Park along the Colorado River from 1973 to 2022 These data were compiled to assess the risk of erosion to archaeological site preservation. The objective of the study is to evaluate changes in archaeological site condition over time as a function of two geomorphology based conceptual models that evaluate the extent to which sites are potentially affected by 1) erosion from gullies, and 2) wind-driven (aeolian) supply of river-sourced sand, respectively. These data represent the results of two classification metrics, based on the two conceptual models, applied to a population of 362 archaeological sites over multiple decades. Both conceptual models numerically rank geomorphic conditions with class values of 1 representing the best potential for archaeological... Categories: Data; Tags: Arizona, Colorado River, Geography, Geomorphology, Glen Canyon Dam, All tags... Grand Canyon National Park, Hydrology, Information Sciences, Remote Sensing, Soil Sciences, USGS Science Data Catalog (SDC), aeolian, aerial photography, archaeological landscapes, archaeological site preservation, archaeological sites, archaeology, baseline data, classification metrics, climatologyMeteorologyAtmosphere, conceptual models, data release, ecological processes, environment, erosion, field inventory and monitoring, geomorphic conditions, geomorphology, geoscientificInformation, gully, inlandWaters, modeling, multidecadal, natural processes, policies and regulations, precipitation (atmospheric), rainfall runoff, regulated flows, risk, river regulation, river-sourced sand, runoff, temporal resolution, terminologies and classifications, Fewer tags