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Filters Date Range Past year (2) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Bridget R Deemer Southwest Biological Science Center U.S. Geological Survey David C Goodenough U.S. Geological Survey - ScienceBase More... Categories Data (2) Tag Types Theme (39) Place (4) Tags (with Scheme=None) alkaline phosphatase (1) bed grain size distributions (1) calcite (1) calcium carbonate (1) canyon shading (1) chemical attributes (1) dam (1) More... View Results as: JSON ATOM CSV

Phosphorus, nitrogen, carbon, calcium, pH, and dissolved oxygen data from incubations of Colorado River water and sediment and associated ambient river water measurements Lake Powell retains most of the phosphorus that it receives, leading to downstream phosphorus limitation. These data were compiled to examine controls on phosphorus cycling below Lake Powell in the Colorado River and from storm inputs from the Paria River. Objectives of our study were to determine how several forms of phosphorus, both organic and inorganic, were cycled under varying dissolved oxygen concentrations and pH, reflecting the range of values observed in the river over the years. These data represent nitrogen, phosphorus, calcium, and carbon concentrations, water quality parameters (pH, dissolved oxygen, temperature), sediment composition, total protein, and extracellular enzyme activity (alkaline phosphatase).... Categories: Data; Tags: Aquatic Biology, Arizona, Colorado River, Ecology, Geochemistry, All tags... Geography, Glen Canyon, Glen Canyon National Recreation Area, Grand Canyon, Grand Canyon National Park, Hydrology, Information Sciences, Lake Mead National Recreation Area, Lake Powell, Lees Ferry, Limnology, Little Colorado River, Paria River, Pearce Ferry, USGS Science Data Catalog (SDC), alkaline earth elements, alkaline phosphatase, atomic emission spectroscopy, biochemistry, biota, bulk density, calcite, calcium carbonate, carbon, chemical analysis, chemical attributes, dam, data release, dissolved oxygen concentrations, dissolved oxygen optodes, dissolved phosphorus concentrations, environment, extracellular enzyme activity, field experiments, freshwater ecosystems, incubations, inductively coupled plasma, inlandWaters, laboratory bottle incubations, laboratory experiments, nitrogen, nutrient content (water), nutrient cycling, organic matter, oxygen content (water), phosphorus, phosphorus content, phosphorus cycling, river systems, river water quality, riverine phosphorus cycling, sediment composition, suspended material (water), tailwater, total dissolved nitrogen, total phosphorus concentrations, total protein analysis, unconsolidated deposits, water chemistry, water chemistry data, water pH, water quality, water quality sonde, water samples, water temperature, Fewer tags Gross primary production estimates and associated light, sediment, and water quality data from the Colorado River below Glen Canyon Dam These data were compiled to model the effects of flow regime and bed grain size distributions on rates of gross primary production (GPP) in the Colorado River below Glen Canyon Dam, AZ, USA. The objectives of our study were to quantify daily and weekly scale effects of an experimental flow regime on GPP in the Colorado River. The experimental flow was conducted at Glen Canyon Dam from May-August in 2018, 2019, and 2020 and contrasted steady-low flows on weekend days with business-as-usual hydropeaking flows during weekdays. This data release only contains data through 2019. These data represent daily-scale estimates of GPP, discharge, turbidity, water depth, and canyon shading for eleven reaches on the Colorado... Categories: Data; Tags: Aquatic Biology, Arizona, Colorado River, Ecology, Geochemistry, All tags... Geography, Glen Canyon, Glen Canyon Dam, Grand Canyon, Grand Canyon National Park, Hydrology, Information Sciences, Limnology, Marble Canyon, Sedimentology, USGS Science Data Catalog (SDC), USGS gage, Water Quality, Water Resources, bed grain size distributions, canyon shading, data release, discharge, dissolved gases, environment, experimental flow regime, field inventory and monitoring, flow regime, gas transfer, grain-size analysis, gross primary production, hydropeaking flows, inlandWaters, light attenuation, northern Arizona, sediment transport, stream discharge, stream-gage measurement, streamflow, surface water quality, turbidity, water depth, water quality, water resources, water sampling, water-quality data, weekly mean discharge, weekly mean gamma, Fewer tags