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52 results for “Colorado River”
Recent Upper Colorado River Streamflow Declines Driven by Loss of Spring Precipitation
<div> <div> <p>The dataset accompanying the manuscript titled "Recent Upper Colorado River Streamflow Declines Driven by Loss of Spring Precipitation" provides comprehensive information on streamflow patterns in the Colorado River since 2000. The dataset is needed to run the analysis available on GitHub available <a href="https://github.com/dlhogan97/Spring-Precipitation-Effect-CO-River.git">here</a>. This is version 2, please use this version for the most up-to-date results.</p> <p><strong>Please read the accompanying README (available in the README.md file) for individual file descriptions and file nesting strategy that should be employed to easily reproduce this analysis.</strong></p> <p>The dataset covers a range of variables related to streamflow and precipitation, including but not limited to discharge measurements, seasonal variations, and relevant meteorological data. The primary focus of the dataset is to elucidate the observed streamflow deficits in the Colorado River, attributing these changes to decreased spring precipitation.</p> <p>Key features of the dataset include:</p> <ul> <li> <p>Time Coverage: The dataset spans a specified time range that aligns with the investigation into recent streamflow deficits in the Colorado River between 1964 and 2022.</p> </li> <li> <p>Spatial Scope: It includes data from relevant monitoring stations along within the Upper Colorado River, but focusing in the hydrologically vital headwater regions, providing a spatially distributed perspective.</p> </li> <li> <p>Variables: The dataset encompasses a variety of variables essential for understanding streamflow dynamics, with a particular emphasis on the impact of reduced spring precipitation.</p> </li> </ul> <p>Researchers and stakeholders interested in hydrological patterns, climate-driven changes, and water resource management in the Colorado River Basin will find this dataset valuable. It serves as a foundational resource for reproducibility, further analysis, and collaboration within the scientific community. The dataset is deposited on Zenodo to facilitate open access, sharing, and citation for broader research endeavors.</p> </div> </div>
Data from: Acoustic surveillance of bats along the Green and Colorado Rivers
<p><em>Aim</em>: Emerging research shows how bioindicators, specifically bats, can serve as a means for monitoring conservation and management of riparian corridors for multiple taxonomic groups. To track changes in composition or abundance of bioindicator species, researchers must attain a baseline in species presence and relative activity. We examined the spatial and temporal patterns of bat community composition and activity along a 1,000-mile river corridor to determine species diversity trends by latitude and habitat.</p> <p><em>Location</em>: Colorado River Basin</p> <p><em>Methods</em>: Here we describe the results from an acoustic bat survey conducted opportunistically on the 2019 Sesquicentennial Colorado River Exploring Expedition. This broad, 1,000-mile survey provides a baseline for species distributions over a large geographic range.</p> <p><em>Results</em>: In total, we collected 63 nights of acoustic data over 70-days and recorded over 59,000 files equating to 45,363 call files (≥2 pulses). 18,490 (41% of call files) were identified to species (n = 19 bat species). We applied non-metric multidimensional scaling to characterize spatiotemporal patterns of activity between species, as well as compared bat activity among river features and local environmental conditions (i.e., temperature and time since sunset) using an information theoretic approach.</p> <p><em>Conclusion</em>: Species composition varied by physiographic region and adjacent river habitat, thus providing a quantifiable measure of determining habitat quality along this major river system and providing baseline information for using bats as bioindicators of habitat quality</p>
Data from: Acoustic surveillance of bats along the Green and Colorado Rivers
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Little Colorado River Gorge, Grand Canyon, AZ
View of the Little Colorado River Gorge and Confluence in the Grand Canyon of Arizona. Showing Navajo Nation land and areas of the Grand Canyon National Park. About 3 miles up the Little Colorado River is the "Sipapu" or "Sipapuni", a travertine dome believed by members of the Hopi tribe to be the place of emergence into this world from a previous world that was destroyed by a flood due to the wicked or "two-heartedness" of those in the previous world. The location is sacred to the Hopi, and is currenrly part of the Navajo Nation tribal lands. Not far upstream from the Sipapu is Blue Spring, the source of the blue-green waters of the Little Colorado River, made possible because of disolved limestone calcium carbonate and trace amounts of copper sulfate. Source: Objaverse 1.0 / Sketchfab
Grand Canyon & Little Colorado River Confluence
This 3D model features the confluence of the Colorado River and the Little Colorado River in the Grand Canyon. A sacred place to Native American tribes like the Navajo and especially Hopi, this area has been under constant threat in recent years by developers wishing to turn the location into a tourist attraction, complete with a gondola to take 8–10k people a day down in the the canyon into an area with a fragile ecosystem, and home to the largest population of endangered Humpback Chub left in the Grand Canyon. Many local leaders and native voices have been raised in support to "Save The Confluence". -Nate Loper Source: Objaverse 1.0 / Sketchfab
Supporting dataset: Towards the Optimal Representation of Sub-Grid Heterogeneity in Land Surface Models - Upper Colorado River Basin study case
<p>Supporting files for the manuscript "Towards the Optimal Representation of Sub-Grid Heterogeneity in Land Surface Models - Upper Colorado River Basin study case." The dataset contains the ESCF derived from the original 800 HydroBlocks simulations used to train/test the random forest models (RFM) to compute the annual mean ESCFs for soil moisture content, sensible heat, latent heat, and runoff, as well as the obtained RFM to compute the resulting number of tiles for a given configuration over the study domain. Besides, the dataset includes the ESCFs for the quasi-fully distributed simulation (QFD) and the input data layers required to run HydroBlocks simulations over the study domain.</p>
Integrated hydrological model results for Lower Triangle Region in East River Watershed, Colorado, WYs 2016 and 2017
<p><strong>Summary</strong></p> <p>This data package contains numerical simulation results of integrated hydrology in Lower Triangle Region in East River Watershed, Colorado. The system is forced with <a href="https://daymet.ornl.gov/">DAYMET</a> precipitation and climate data of the region for the water years 2016 and 2017. The results are computed on triangular multi-resolution meshes with resolutions ranging from 10 meter to 80 meter. The purpose of the data is to assess the influence of surface-subsurface exchange on distributed and aggregated hydrological response.</p> <p><strong>Material and Methods</strong></p> <p>Data has been generated by the <a href="https://amanzi.github.io/">Advanced Terrestrial Simulator (ATS)</a> v1.0. The output format of ATS for spatially distributed data is <a href="https://www.hdfgroup.org/solutions/hdf5">HDF5</a> and can be viewed, for example, using <a href="https://hpc.llnl.gov/software/visualization-software/visit">VisIt</a> or <a href="https://www.paraview.org/">ParaView</a>. The format of point data is plain text.</p> <p><strong>README content</strong></p> <p>The uploaded files have been created using the unix split(1) command to limit the size of each individual package. Files can be merged under a unix system through:</p> <p><code>$ cat OZGEN_ETAL_2022.zip.partaa OZGEN_ETAL_2022.zip.partab OZGEN_ETAL_2022.zip.partac > output.zip</code></p> <p>Unzip via</p> <p><code>$ unzip output.zip</code></p> <p>or using a graphical environment.</p>
Data from: Reach-scale geomorphic characteristics influencing post-fire river response in mountain streams, Colorado, USA
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Winter inputs buffer streamflow sensitivity to snowpack losses in the Salt River Watershed in the Lower Colorado River Basin
Recent streamflow declines in the Upper Colorado River Basin raise concerns about the sensitivity of water supply for 40 million people to rising temperatures. Yet, other studies in western US river basins present a paradox: streamflow has not consistently declined with warming and snow loss. A potential explanation for this lack of consistency is warming-induced production of winter runoff when potential evaporative losses are low. This mechanism is more likely in basins at lower elevations or latitudes with relatively warm winter temperatures and intermittent snowpacks. We test whether this accounts for streamflow patterns in nine gaged basins of the Salt River and its tributaries, which is a sub-basin in the Lower Colorado River Basin (LCRB). We develop a basin-scale model that separates snow and rainfall inputs and simulates snow accumulation and melt using temperature, precipitation, and relative humidity. Despite significant warming from 1968–2011 and snow loss in many of the basins, annual and seasonal streamflow did not decline. Between 25% and 50% of annual streamflow is generated in winter (NDJF) when runoff ratios are generally higher and potential evapotranspiration losses are one-third of potential losses in spring (MAMJ). Sub-annual streamflow responses to winter inputs were larger and more efficient than spring and summer responses and their frequencies and magnitudes increased in 1968–2011 compared to 1929–1967. In total, 75% of the largest winter events were associated with atmospheric rivers, which can produce large cool-season streamflow peaks. We conclude that temperature-induced snow loss in this LCRB sub-basin was moderated by enhanced winter hydrological inputs and streamflow production.
Estimating densities of larval Salmonflies (Pteronarcys californica) through multiple pass removal of post-emergent exuvia in Colorado rivers
<p>Traditional methods of collecting, sorting, and identifying benthic macroinvertebrate samples are useful for stream biomonitoring and ecological studies, however, these methods are time consuming, expensive, and require taxonomic expertise. Estimating larval densities through collection of post-emergent exuvia can be a practical and time efficient alternative. We evaluated the use of multiple pass depletion techniques of the post-emergent exuvia of <em>Pteronarcys californica</em> to estimate larval densities at ten sites in three Colorado rivers. Exuvia density was highly correlated with both final-instar larval density (R2 = 0.90) and total larval density (R2 = 0.88) and the multiple pass removal technique performed well. Exuvia surveys found P. californica at three low density sites where benthic sampling failed to detect it. At moderate and high density sites the exuvia surveys always produced lower density estimates than benthic surveys. Multiple pass depletion estimates of exuvia proved to be an accurate and efficient technique at estimating larval densities and provided an effective alternative for traditional benthic sampling when objectives are detecting and monitoring P. californica, especially at low density sites.</p>
FIGURE 4. Aethriamanta rezia Kirby, 1889 in A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera)
FIGURE 4. Aethriamanta rezia Kirby, 1889, specimen from Guinée Nimba, Marais Yafélé, alt. 500 m, 16 April 1991 (J. Legrand leg.)
FIGURE 5 in A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera)
FIGURE 5. Urothemis assignata (Selys, 1872), Sénégal, Casamance, Djibelor, 5 June 1981 (J. Etienne leg.)
FIGURE 3 in A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera)
FIGURE 3. Urolibellula eocenica sp. n., holotype specimen, drawing of hindwing (scale bar represents 4 mm).
FIGURE 2 in A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera)
FIGURE 2. Urolibellula eocenica sp. n., holotype specimen, drawing of forewing (scale bar represents 4 mm).
FIGURE 1 in A new libelluloid family from the Eocene Green River Formation (Colorado, USA) (Odonata, Anisoptera)
FIGURE 1. Urolibellula eocenica sp. n., holotype specimen, photograph of general habitus (scale bar represents 3 mm).
FIGURE 1 in An interesting new genus of Berothinae (Neuroptera: Berothidae) from the early Eocene Green River Formation, Colorado
FIGURE 1. Xenoberotha angustialata gen. et sp. nov., holotype UCM 80385. A, the specimen as preserved (part). B, same (counterpart); both wetted with ethanol. C, the venation of the left forewing (converted to standard view, with apex to the right). Grey shadings show the color pattern. h, hypocauda; ph, pseudohypocauda. Scale bars = 1 mm.
FIGURE 2 in An interesting new genus of Berothinae (Neuroptera: Berothidae) from the early Eocene Green River Formation, Colorado
FIGURE 2. Xenoberotha angustialata gen. et sp. nov., holotype UCM 80385. Head and forelegs, ventral view (wetted with ethanol). cx, coxa; fm, femur; sc, scapus; ti, tibia. Scale bar = 0.5 mm.
Little Colorado River Drainage Panel
An abused panel... Eastern Arizona Source: Objaverse 1.0 / Sketchfab
Subspecies and Distribution. S. p. putorius Linnaeus, 1758 — E & SE USA (Mississippi, Alabama & N Florida, through Georgia, N to SC Pennsylvania). S. p. ambarvalis Bangs, 1898 — SE USA (Peninsular Florida). S. p. interrupta Rafinesque, 1820 — USA (Canadian border in Minnesota, C North Dakota, E Wyoming, E Colorado, W Oklahoma, NW Texas, south to C Texas, and east to the Mississippi River along Louisiana, Arkansas, Missouri & Iowa, up to Wisconsin. in Mephitidae
Subspecies and Distribution. S. p. putorius Linnaeus, 1758 — E & SE USA (Mississippi, Alabama & N Florida, through Georgia, N to SC Pennsylvania). S. p. ambarvalis Bangs, 1898 — SE USA (Peninsular Florida). S. p. interrupta Rafinesque, 1820 — USA (Canadian border in Minnesota, C North Dakota, E Wyoming, E Colorado, W Oklahoma, NW Texas, south to C Texas, and east to the Mississippi River along Louisiana, Arkansas, Missouri & Iowa, up to Wisconsin.
Subspecies and Distribution. C. h. humboldtii Gray, 1837 — Patagonia (Chile and Argentina) to the Strait of Magellan. C. h. castaneus d'Orbigny & Gervais, 1847 — C Argentina (S provinces of Buenos Aires & La Pampa to N Rio Negro; it also follows along the Colorado and Black Rivers to Neuquen and S Mendoza). C. h. proteus Thomas, 1902 — subandean C Argentina (Catamarca, La Rioja, San Juan, San Luis & N Mendoza). in Mephitidae
Subspecies and Distribution. C. h. humboldtii Gray, 1837 — Patagonia (Chile and Argentina) to the Strait of Magellan. C. h. castaneus d'Orbigny & Gervais, 1847 — C Argentina (S provinces of Buenos Aires & La Pampa to N Rio Negro; it also follows along the Colorado and Black Rivers to Neuquen and S Mendoza). C. h. proteus Thomas, 1902 — subandean C Argentina (Catamarca, La Rioja, San Juan, San Luis & N Mendoza).
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.