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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...
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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...
Tags: Arizona, Colorado River, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, All tags...
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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...
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These data were compiled to accompany flow modeling work on Little Colorado river above the mouth (USGS gage 09402300). The data include example models in FaSTMECH and SToRM solvers in the iRIC framework, topographic data collected by LiDAR and total station in June 2017, and high water marks from nine historic floods. Other data also include location and other information for control points and gage structures. Topographic data include ground topography collected by LiDAR and channel bathymetry collected by total station survey of a 2500 meter reach of the Little Colorado River ending near the confluence with the Colorado River. High water mark data were collected by USGS personnel using total station surveys and...
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These data were compiled to accompany flow modeling work on Little Colorado river above the mouth (USGS gage 09402300). The data consist of a baseflow longitudinal profile of the lowermost 22 km of the Little Colorado River. This profile was digitized from 10 map plates from the Horizons Inc Aerial Mapping Professionals 1990-1992 Overflight data report produced for Glen Canyon Environmental Studies.
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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...
Tags: Arizona, Botany, Colorado River, Ecology, Geography, All tags...
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These data were compiled to provide satellite remote sensing observations of landcover in the vicinity of wetlands fed by geothermal springs in Dixie Meadows, Nevada, USA. Objectives of the study were to map landcover of water, vegetation, and soil between October 5, 2015, and January 21, 2022, using available imagery from the Sentinel-2 mission. The U.S. Geological Survey's Southwest Biological Science Center (SBSC) and Grand Canyon Monitoring and Research Center (GCMRC) processed 110 Sentinel-2 satellite images representing bottom of atmosphere surface reflectance and classified them within Google Earth Engine (GEE) using threshold values of the Green Normalized Difference Vegetation Index (gNDVI) and its inverse...
Categories: Data; Tags: Bureau of Land Management Lands, Churchill County, Department of Defense Lands, Dixie Meadows, Dixie Valley, All tags...
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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...
Tags: Arizona, Colorado River, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, All tags...
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These data are records collected from six automated weather stations in operation between January 1, 2014 and December 31, 2015 within the Colorado River Corridor of Grand Canyon National Park and Glen Canyon National Recreation Area. Data collection locations, equipment configurations and methods follow those of the original report (OFR 2014-1247). These files are 4-minute interval data for each of the automated weather stations, tab separated by parameter (wind direction, wind speed, wind gusts, air temperature, relative humidity, barometric pressure, and rainfall). Climatic conditions during the reporting period were warm and dry early in 2014 and transitioned to average to slightly above precipitation from mid-2014...
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These data were compiled for Cabeza Prieta National Wildlife Refuge (CPNWR) in southern Arizona, to support managment efforts of water resources and wildlife conservation. Objective(s) of our study were to 1) measure water storage capacity at select stage heights in three tanks (also termed tinajas), 2) build a stage storage model to help CPNWR staff accurately estimate water volumes throughout the year, and 3) collect topographic data adjacent to the tanks as a means to help connect these survey data to past or future work. These data represent high-resolution (sub-meter) ground based lidar measurements used to meet these objectives and are provided as: processed lidar files (point clouds), rasters (digital elevation...
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These data were compiled to enable estimation of aeolian dune field sediment budgets calculated using remote sensing methods. The objective of the study was to evaluate sediment budgets calculated for the Lees Ferry dune field in Grand Canyon, Earth as a terrestrial analog for aeolian dune fields in Valles Marineris, Mars. These data represent digital elevation models (DEM) of the topography of the Lees Ferry dune field in February and May, 2019, respectively. These data were collected with an Uncrewed Aerial Vehicle (UAV) remote sensing survey conducted on February 28th and then repeated on May 2nd, 2019. The images acquired with the UAV surveys were processed with photogrammetric modelling to produce the DEMs....
_README_Contents-Directory.txt 1. model-software-version.txt (file) Identifies the modeling software, version, and website. 2. modelgeoref.txt (file) Includes reference to the model documentation report, data release, and bounding box coordinates. 3. source (directory) Contains the iRIC ver 3.0 program file. 4. inputs-outputs (directory) Contains the iRIC project file (containing model input and output files) for each simulation. 5. calibration-target (directory) Contains the high water marks surveyed in 2017 and differentiated into sets interpreted as strand lines or deposits from one or more floods reaching the same peak water surface elevation. These files are also included and described in the parent...
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This workbook contains spatial data on the hydrology, sedimentology, and vegetation extent within the Colorado River corridor from 60 to 78 miles (97 to 125 kilometers) downstream from Glen Canyon Dam, Arizona. In combination with the accompanying MATLAB scripts, these data were used to generate the results within the accompanying manuscript (Kasprak et al., Quantifying and Forecasting Changes in the Areal Extent of River Valley Sediment in Response to Altered Hydrology and Land Cover). Specifically, the datasets include (a) the daily mean or estimated/measured maximum discharge for the Colorado River at Lees Ferry (USGS #09380000) from 1921 to 2016, (b) the estimated daily maximum discharge for the future period...
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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...
Tags: Arizona, Colorado River, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, All tags...
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This data release presents data used for analyzing spatial and temporal differences in soil surface roughness within selected biocrust communities. These records were collected by ground-based lidar for 121, 1m x 3m soil plots with biological soil crusts (biocrusts). Roughness was estimated from 5 mm resolution data (CloudCompare v. 2.10.2, 2019) for two Great Basin Desert sites (UTTR-1; UTTR-2) in December 2015 and one Chihuahuan Desert site (JER) in February 2016. Data were again collected in June 2018 for UTTR-1 and UTTR-2. Additional field and laboratory data were included within this study to understand differences in soil surface roughness between UTTR and JER as well as between the 2016 and 2018 surveys at...
Categories: Data; Tags: 5 mm resolution, Chihuahuan Desert, Ecology, Geography, Geomorphology, All tags...
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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...


    map background search result map search result map Meteorological Data for Selected Sites along the Colorado River Corridor, Arizona, 2014-2015 River Valley Sediment Connectivity Data, Colorado River, Grand Canyon Topographic data, historical peak-stage data, and 2D flow models for the lowermost Little Colorado River, Arizona, USA, 2017 1990-1992 Longitudinal Profile of the Lowermost 22 km of the Little Colorado River Soil surface properties and roughness data at two experimental restoration sites within the Southwestern USA Sediment budget data for Lees Ferry dune field, February-May 2019 Threshold friction velocities for aeolian transport of river-sourced sand, with related moisture content, grain size, topographic, and wind data from Lees Ferry, Arizona Data collected for estimation of storage capacity at managed water resources used by Desert Bighorn Sheep in Cabeza Prieta National Wildlife Refuge, Arizona, February 2022 Land cover classification data for wetland complexes at Dixie Meadows, Nevada from October 2015 to January 2022 Aeolian and drainage classification data for various archaeological sites in Grand Canyon National Park along the Colorado River from 1973 to 2022 Compilation of topographic data, aerial imagery, and land cover classification, collected between 1984 to 2021 for an aeolian dune field near Lees Ferry, AZ Lidar point cloud data for an aeolian dune field near Lees Ferry, AZ Topographic, aerial imagery, and unoccupied aerial vehicle (UAV) data for an aeolian dune field near Lees Ferry, AZ Classified land cover and vegetation canopy cover data for an aeolian dune field near Lees Ferry, AZ 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 Sediment budget data for Lees Ferry dune field, February-May 2019 Compilation of topographic data, aerial imagery, and land cover classification, collected between 1984 to 2021 for an aeolian dune field near Lees Ferry, AZ Lidar point cloud data for an aeolian dune field near Lees Ferry, AZ Topographic, aerial imagery, and unoccupied aerial vehicle (UAV) data for an aeolian dune field near Lees Ferry, AZ Classified land cover and vegetation canopy cover data for an aeolian dune field near Lees Ferry, AZ 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 Threshold friction velocities for aeolian transport of river-sourced sand, with related moisture content, grain size, topographic, and wind data from Lees Ferry, Arizona Topographic data, historical peak-stage data, and 2D flow models for the lowermost Little Colorado River, Arizona, USA, 2017 Land cover classification data for wetland complexes at Dixie Meadows, Nevada from October 2015 to January 2022 1990-1992 Longitudinal Profile of the Lowermost 22 km of the Little Colorado River Data collected for estimation of storage capacity at managed water resources used by Desert Bighorn Sheep in Cabeza Prieta National Wildlife Refuge, Arizona, February 2022 Meteorological Data for Selected Sites along the Colorado River Corridor, Arizona, 2014-2015 River Valley Sediment Connectivity Data, Colorado River, Grand Canyon Aeolian and drainage classification data for various archaeological sites in Grand Canyon National Park along the Colorado River from 1973 to 2022 Soil surface properties and roughness data at two experimental restoration sites within the Southwestern USA