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Survey Data Collection for the Bureau of Reclamation at Glen Canyon Dam near Page, Arizona, November 2020.
This dataset describes survey data collected for the Bureau of Reclamation (Reclamation), the agency in charge of regulating Colorado River water control operations impounding the Lake Powell reservoir. Additional intent of the collected data was to assure consistencies among gaging elevations at Glen Canyon Dam near Page, Arizona as well as verification and alignment of a recently published topobathymetric digital elevation model for Lake Powell. Glen Canyon Dam is a concrete arch-gravity dam on the Colorado River in northern Arizona and is the second largest man-made reservoir in the United States. The location was chosen to survey due to uncertainty in the local datum used by the Reclamation as well as uncertainties regarding elevation consistencies among the local United States Geological Survey (USGS) gaging operation 09379900 Lake Powell at Glen Canyon Dam, Arizona. The primary component of the survey involved a differential leveling campaign derived from fiducial benchmarks used to perpetuate elevation to a variety of objective points. Additionally, the survey consisted of a Global Navigation Satellite System (GNSS) (Rydlund and Densmore, 2012) campaign constrained to fiducial benchmarks that were used to develop network solutions at the same objective points derived by leveling. This Level I static network GNSS campaign was conducted to quality assure the leveling campaign as well as integrate ellipsoid and geoid height characteristics tied to active monumentation. A third GNSS campaign involved a level III single-base static survey of Lake Powell water-surface elevations that were conducted at marina locations of Antelope and Wahweap, Arizona, along with a location at Bullfrog, Utah to provide comparison and assure alignment of the topobathymetric digital elevation model used to develop a current area capacity table at Lake Powell. Six items containing the survey data and the relevant information are available for download. They are GCD_USBR_LEVEL_SUMMARY.csv, GCD_USBR_LEVEL_SUMMARY.zip, GCD_USBR_MARK_RECOVERY.zip, GCD_USBR_STATIC_NETWORK.csv, GCD_USBR_WSE.csv, and GCD_USBR_LAKE_SURVEY.zip. Differential leveling final elevation for selected objective points are located in GCD_USBR_LEVEL_SUMMARY.csv. Field notes and details representing fiducial benchmarks and objective points within the differential leveling campaign are located in GCD_USBR_LEVEL_SUMMARY.zip. Fiducial marks recovery photographs and integration of USGS recovery forms are located in GCD_USBR_MARK_RECOVERY.zip. GNSS survey solutions referenced in Arizona State Plane Central Zone 0202, Universal Transverse Mercator 12 North, and Geographic (Decimal Degrees) are located in GCD_USBR_STATIC_NETWORK.csv. Orthometric heights in both Geoid 18 and Geoid 12b along with comparisons to differential leveling surveys are also located in GCD_USBR_STATIC_NETWORK.csv. The Lake Powell survey solutions are in the same format as GCD_USBR_STATIC_NETWORK.csv but located in GCD_USBR_WSE.csv. Photographs and USGS GNSS Level IV static observation forms of the lake survey are located in GCD_USBR_LAKE_SURVEY.zip. References Cited: Rydlund, P.H., Jr., and Densmore, B.K., 2012, Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey: U.S. Geological Survey Techniques and Methods, book 11, chap. D1, 102 p. with appendixes., https://doi.org/10.3133/tm11D1.
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Theodore Roosevelt Lake (Arizona) Sedimentation Survey ACAP Table 2013
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The Bureau of Reclamation conducted a survey at Theodore Roosevelt Lake in May 2013. Survey data were used to update reservoir topography and compute the present storage-elevation relationship of the reservoir as an area-capacity (ACAP) table. This item is the ACAP table. See the corresponding report for more information.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
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The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of digitized water-level-elevation contours.
Long-term sandbar monitoring data along the Colorado River in Marble and Grand Canyons, Arizona
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This data release comprises nearly three decades of measurements of sandbar topography for monitoring sites along the Colorado River in Grand Canyon National Park and Glen Canyon National Recreation Area. The data were collected to monitor the effects of the operations of Glen Canyon Dam on sandbars, which are also recreational campsites. The data were collected by the US Geological Survey Grand Canyon Monitoring and Research Center in cooperation with Northern Arizona University. Funding for data collection, processing, and reporting has been provided by the Glen Canyon Dam Adaptive Management Program administered by the US Department of the Interior Bureau of Reclamation.
Riparian vegetation data downstream of Glen Canyon Dam in Glen Canyon National Recreation Area and Grand Canyon National Park, AZ from 2014 to 2019
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These data were collected by the Grand Canyon Monitoring and Research Center (GCMRC) to support riparian vegetation monitoring along the Colorado River between Glen Canyon Dam and the full pool level of Lake Mead. The objectives of the GCMRC riparian vegetation monitoring program are to annually measure and summarize the status (composition and cover) of native and non-native vascular plant species within the riparian zone of the Colorado River between Glen Canyon Dam and Lake Mead, assess change in the vegetation composition and cover in the riparian zone, as related to geomorphic setting and dam operations, particularly flow regime, and collect data in a manner that can be used by multiple stakeholders and is compatible with the basin-wide monitoring program overseen by the National Park Service’s Northern Colorado Plateau Network Inventory and Monitoring program. These data represent estimated cover and richness of plants, as well as associated environmental variables at sample sites visited in 2014 and 2016-2019. These data were collected in the field following the Palmquist and others (2018) published protocol in August, September, and October of each year. This protocol uses ocular cover estimates of variables of interest in 1-m2 quadrat frames at both randomly-selected and annually sampled long-term monitoring sites. Within the study area (between Glen Canyon Dam and the full pool level of Lake Mead), these data can be used to evaluate changes in riparian plant cover between 2014 and 2019, evaluate differences in floristic composition, estimate the frequency and cover of recorded plant species, document approximate distributions of plant species, and estimate species richness and diversity. Caution should be used when combining these data with other data sets, particularly those that utilize different plant cover estimation methods (for example, line-point intercept).
Hydrologic Data Collected at Leaky Weirs, Cienega Ranch, Willcox, AZ (March 2019 - October 2020)
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This dataset contains hydrological data collected at a series of leaky weirs on a working ranchland site in a semiarid ecosystem in Cochise County, Arizona, from 2018-2020. Leaky weirs are a type of structure being experimented with by land managers in aridlands to reduce peak flow events and increase recharge to the aquifer. The weirs are constructed of rock cemented into place in areas of exposed bedrock within the channel are built to allow for water to leak through slowly. Three sites were instrumented for monitoring, one control and two sites treated with ‘leaky weirs’. At each site, at least one pressure transducer was installed in a piezometer to measure water level. Each site also had multiple “3-in-1” gauges, which included two iButton temperature sensors at different depths to capture temperature changes associated with changing water levels and a crest stage gauge to capture the high-water mark. Finally, each site had at least one ‘hydrocam’ to capture photos of flow events. The “LeakyWeir.zip” data release zip file includes the following directories: HydroCamData which contains one daily representative jpg image from each hydrocam and jpgs of all hydrocam photos with visible surface flow; SpatialData which includes a shapefile of instrument locations and a CSV file with instrument height data; ThreeInOneData which includes data from the 3-in-1 sensors, specifically the temperature and depths of iButton sensors; TransducerData which includes raw and corrected pressure transducer data, reference read data used to correct the transducer data as well as the script for interpolating weather station data. The "LeakyWeir_noPhotos.zip" contains everything but the photos for faster download times.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
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The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of depth-to-water (unsaturated-thickness) contours that were generated from hydrogeologic data with Geographic Information System (GIS) software.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
공공데이터포털
The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of bedrock-outcrop outlines from hand-drawn maps.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
공공데이터포털
The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of study-area outlines from hand-drawn maps.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
공공데이터포털
The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of study-area outlines from hand-drawn maps.
Digital geospatial datasets in support of hydrologic investigations of the Colorado Front Range Infrastructure Resources Project
공공데이터포털
The U.S. Geological Survey developed this dataset as part of the Colorado Front Range Infrastructure Resources Project (FRIRP). One goal of the FRIRP was to provide information on the availability of those hydrogeologic resources that are either critical to maintaining infrastructure along the northern Front Range or that may become less available because of urban expansion in the northern Front Range. This dataset extends from the Boulder-Jefferson County line on the south, to the middle of Larimer and Weld Counties on the North. On the west, this dataset is bounded by the approximate mountain front of the Front Range of the Rocky Mountains; on the east, by an arbitrary north-south line extending through a point about 6.5 kilometers east of Greeley. This digital geospatial dataset consists of digitized contours of unconsolidated-sediment thickness (depth to bedrock).
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