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This data release presents the results of analyses of biota and water samples collected on multiple dates from 2007 to 2014 at 3 locations in Lake Mead National Recreation Area. Data are presented in 3 spreadsheets containing sample analyses for (1) stable isotopes in biota (2007-2014), (2) synthetic organic compounds in biota (2013-2014), and (3) synthetic organic compounds in water (2013-2014)
This dataset represents a partial record of Rio Grande time-series flow data from locations in Dona Ana County and Sierra County, New Mexico; El Paso County and Hudspeth County, Texas; and Chihuahua, Mexico. Records from 1908 to 2010 are presented from 79 sources consisting of 11 drains, 8 canals, 6 laterals, 34 waste-ways, and 20 stream gaging stations. In 2015 the US Geological Survey obtained scanned original paper documentation from the Bureau of Reclamation El Paso Field Office and electronic Lotus 123 files of flow records from the Bureau of Reclamation Upper Colorado Region. These records were digitized and transcribed into Excel files. This data release consists of both the Excel files containing daily,...
This dataset presents the results of analysis of aquatic biota tissue samples, collected over multiple sampling events from in from 2007 to 2014 at three sites (Las Vegas Bay, Overton Arm, and Boulder Basin) in Lake Mead National Recreational Area. The tissue samples were analyzed for concentrations of Carbon 13 and Nitrogen 15 isotopes by the University of California, Davis in Davis, California. Data are presented in 1 spreadsheet worksheet that is organized by year, location, and taxa. General trophic level (Vander Zanden and Rasmussen, 1999) and calculations of benthic reliance (Umek and others, 2010) also are included. Combined data from sampling events in 2007 and 2008 previously were published in Umek and...
Categories: Data;
Tags: Boulder Basin,
Colorado River,
Lake Mead,
Lake Mead National Recreational Area,
Las Vegas,
This dataset presents the results of passive water sampling conducted at 2 sites in 2013 and 3 sites in 2014 in Lake Mead National Recreational Area. Polar Organic Chemical Integrative Samplers (POCIS) and Semipermeable Membrane Devices (SPMDs) were deployed in Las Vegas Bay and Overton Arm in 2013 and Las Vegas Bay, Boulder Basin, and Overton Arm in 2014. The samplers were analyzed for concentrations of polychlorinated biphenyls (PCBs), organochlorines (DDT-type compounds and their degradates), polybrominated biphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs), waste indicators (WW), and yeast estrogen screen (YES) by the U.S. Geological Survey (USGS) at the Columbia Environmental Research Center (CERC)...
Categories: Data;
Tags: Boulder Basin,
Colorado River,
Lake Mead,
Lake Mead National Recreational Area,
Las Vegas,
This data release consists of four directories: GroundwaterWithdrawals, Precipitation, WaterLevelDatabase, and WLMs. The GroundwaterWithdrawals directory contains a Microsoft Excel workbook with groundwater withdrawal data from 1996-2015 for water-supply wells in Beatty and Bullfrog Hills, Nye County, Nevada. The Precipitation directory contains four Microsoft Excel workbooks with data from precipitation stations and analyses used to construct long-term precipitation index records. The WaterLevelDatabase directory contains a Microsoft Excel workbook with hydrographs and well information for the 79 wells analyzed in the larger work. The WLMs directory contains 11 water-level models that were used to determine hydrologic...
This dataset presents the results of analysis of aquatic biota tissue samples, collected at 2 sites (Las Vegas Bay and Overton Arm) in 2013 and 2 sites (Las Vegas Bay, Boulder Basin, and Overton Arm) in 2014 in Lake Mead National Recreational Area. The tissue samples were analyzed for concentrations of more than 250 compounds and congeners of polychlorinated biphenyls (PCBs), organochlorine pesticides (DDT and its degradates), wastewater chemicals, and polybrominated diphenyl ethers (PBDEs) by the U.S. Geological Survey (USGS) at the Columbia Environmental Research Center (CERC) in Columbia, Missouri. Analysis methods include low-resolution, high-resolution, and full spectrum mass spectrometry and high-resolution...
Categories: Data;
Tags: Boulder Basin,
Colorado River,
Lake Mead,
Lake Mead National Recreational Area,
Las Vegas,
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