Christopher Churchill

Nutrients and Major-Ions Measured in Water-Quality Samples Collected from Four North Texas Reservoirs (ver. 3.0, September 2021)

In cooperation with Dallas Water Utilities (DWU), the U.S. Geological Survey (USGS) measures nutrient and major-ion concentrations in selected reservoirs in north Texas. This data release documents water-quality data obtained from Ray Hubbard Lake, Grapevine Lake, Ray Roberts Lake, and Lake Lewisville during water years 2016-20. In addition to nutrient and major-ion concentrations, water-quality field properties and other selected constituents measured in the water-quality samples collected from these reservoirs are documented. The study began in water year 2016 (WY16) with monthly sampling of Ray Hubbard Lake. A water year is defined as the 12-month period from October 1 through September 30 and is designated...

Categories: Data Release - Revised; Tags: Dallas, Dallas, Grapevine, Grapevine Lake, Lake Lewisville, All tags... Lewisville, Ray Hubbard Lake, Ray Roberts Lake, Texas, USGS Science Data Catalog (SDC), nutrient content (water), water quality, Fewer tags

BioLake: A first assessment of lake temperature-derived bioclimatic predictors for aquatic invasive species

Aquatic invasive species (AIS) present major ecological and economic challenges globally, endangering ecosystems and human livelihoods. Managers and policy makers thus need tools to predict invasion risk and prioritize species and areas of concern, and they often use native range climate matching to determine whether a species could persist in a new location. However, climate matching for AIS often relies on air temperature rather than water temperature due to a lack of global water temperature data layers, and predictive power of models is seldom evaluated. We developed 12 global lake (water) temperature-derived “BioLake” bioclimatic layers for distribution modeling of aquatic species and compared “climatch” climate...

Categories: Publication; Types: Citation

Biological and physical data for zebra mussel (Dreissena polymorpha) veligers collected from a coupled lake-stream ecosystem in north Texas, 2012-2014

Dispersal, establishment, and spread of aquatic invasive species such as the zebra mussel (Dreissena polymorpha) can be influenced by riverine velocities and volumetric flows in invaded lake-stream ecosystems. Zebra mussels, which have a planktonic larval form (veliger), disperse rapidly downstream from a source population. Concentrations, dispersal, and body conditions of zebra mussel veligers were studied under different volumetric flow, or discharge, conditions in a coupled lake-stream ecosystem in northern Texas, USA. Veliger densities in lotic environments were strongly related to population dynamics in upstream lentic source populations. A strong exponential decrease in veliger density was observed through...

Categories: Data; Tags: Aquatic Biology, Aquatic ecosystem, Dallas, Dispersal, Ecology, All tags... Elm Fork Trinity River, Fort Worth, Geographical distribution, Lake Lewisville, Lake Texoma, Larvae, Oklahoma, Planktonic, Population dynamics, Ray Roberts Lake, Red River, River discharge, Texas, Trinity River, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Wildlife Biology, Fewer tags

Phytoplankton Data for 18 Texas Reservoirs, August through October, 2016

This U.S. Geological Survey (USGS) Data Release provides phytoplankton data collected from 18 Texas reservoirs during August through October, 2016. All data are reported as raw calculated values and are not rounded to USGS significant figures. This data release was produced in compliance with the open data requirements as a way to make scientific products associated with USGS research efforts and publications available to the public. The dataset includes all routine and quality assurance/quality control samples collected at each of the sites. Phytoplankton were identified to the lowest possible taxonomic level and abundance (density reported as both natural units and cells) and biovolume are reported.

Categories: Data, Data Release - Revised; Tags: Algae, Benbrook Lake, Site CC near Fort Worth, TX, Braunig Lake, Site CC near Elmendorf, TX, Caruth Lake, Site CC near Rockwall, TX, Class, All tags... Division, Family, Freshwater, Ft. Phantom Hill Reservoir, PS Site near Nugent, TX, Genus, Grapevine Lake at Murrell Pk E, Grapevine, TX, Lake, Lake Arrowhead, Site EC near Wichita Falls, TX, Lake Buchanan, Council Creek near Burnet, TX, Lake Kemp, Site AC near Mabelle, TX, Lake Meredith, Lake Meredith Marina near Sanford, TX, Lake Murvaul, Site CC near Gary City, TX, Lake O' the Pines, Site CC near Ore City, TX, Lake Palestine at Highway 55, Ledbetter Bay, TX, Lake Somerville, Ripple Creek Ramp near Somerville, TX, Lake Texoma, tributary near Willis, OK, Lake Whitney, NLA site near Laguna Park, TX, Millers Creek Reservoir, Site CC near Goree, TX, NRCS Upper Bosque Reservoir, Site No. 4 near Stephenville, TX, Order, Phytoplankton, Reservoir, Species, Taxa, Taxonomy, Texas, Texas, USGS North Texas Program Office, Fort Worth, TX, USGS Science Data Catalog (SDC), USGS Station ID 291547098231901, USGS Station ID 301915096370601, USGS Station ID 304924098205101, USGS Station ID 315424097250701, USGS Station ID 320115094253201, USGS Station ID 320742095290700, USGS Station ID 321713098154301, USGS Station ID 323632099410401, USGS Station ID 323800097264101, USGS Station ID 324859094400401, USGS Station ID 325648096271401, USGS Station ID 325933097050100, USGS Station ID 331533094210901, USGS Station ID 332502099225001, USGS Station ID 333930098244300, USGS Station ID 334520099092101, USGS Station ID 335527096515000, USGS Station ID 354225101331601, USGS Station ID 88480401, United States, Wright Patman Lake, Site GC near Texarkana, TX, Fewer tags

Detections and concentrations of compounds of emerging concern at water treatment plants and in the Trinity River in or near Dallas, Texas, 2009-13

This data release documents water-quality data obtained as part of an assessment of compounds of emerging concern (CECs) measured in samples collected at potable water and wastewater treatment plants in Dallas and downstream from Dallas in the Trinity River from August 2009 to December 2013 by the U.S. Geological Survey in cooperation with the City of Dallas, Dallas Water Utilities. Targeted CECs (120 total) included human-health pharmaceuticals (prescription and non-prescription), antibiotics, steroidal hormones, stanols, sterols, detergents, personal-use products (flavors and fragrances), pesticides and repellents, industrial wastewater compounds, disinfection compounds, PAHs, flame retardants, and plasticizers....

Tags: Dallas, Elm Fork Trinity River, Environmental Health, Trinity River, USGS Science Data Catalog (SDC), All tags... Water Quality, Water Resources, compounds of emerging concern, pharmaceutical contamination, pharmaceuticals and personal care products, surface water quality, water quality, Fewer tags