Filters: Tags: Limnology (X) > Categories: Data (X)

Filters Date Range Past year (60) Past month (6) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (25) Raster (17) ArcGIS Service Definition (1) Types Map Service (66) OGC WFS Layer (49) OGC WMS Layer (49) Downloadable (43) OGC WMS Service (28) More... Contacts U.S. Geological Survey - ScienceBase U.S. Geological Survey Ecosystems Jenny L Hanson Water Resources More... Categories Data Release - Revised (6) Tag Types Theme (175) Place (174) USGS Scientific Topic Keyword (106) Harvest Set (112) CMS Non-theme Topics (9) CMS Themes (9) CMS Topics (9) More... Tag Schemes USGS Thesaurus (146) None (66) Geographic Names Information System (GNIS) (31) Common geographic areas (80) ISO 19115 Topic Category (115) U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D. C., NIST (5) Geographic Names Information System (17) More... View Results as: JSON ATOM CSV

Zooplankton, Benthos, Mysis, and fish diet data from northern Lake Huron in 2012 These data consist of a multi-trophic, day vs. night, nearshore to offshore transect approach for data collection for this Cooperative Science and Monitoring Initiative effort at two northwestern Lake Huron sites near Hammond Bay and Thunder Bay, Michigan. Zooplankton and Mysis samples were collected monthly from April-October while benthos and prey fish samples were collected seasonally during Spring, Summer, and Fall. Invertebrate taxa (zooplankton, Mysis, benthic macroinvertebrates) were identified, enumerated, and measured using a dissecting microscope. Diet items of the prey fish were processed similarly to the other samples in terms of taxonomy. These data were used to calculate densities of fish prey items... Categories: Data; Tags: Aquatic Biology, Ecology, Geography, Lake Huron, Limnology, All tags... Northwestern Lake Huron, USGS Science Data Catalog (SDC), Zooplankton, aquatic ecosystems, biota, community ecology, environment, fisheries biology, food web, inlandWaters, population and community ecology, Fewer tags Owasco Lake, New York spatial water-quality data, June 26 and October 8, 2019 This child item data set provides high-resolution, nearshore, spatial water-quality data collected from Owasco Lake, New York, on June 26 and October 8, 2019. All data are reported as raw measured values. Continuous water-quality monitors were mounted to a boat at approximately 0.5-meters below the water surface and used to measure nitrate, chlorophyll fluorescence (fChl), fluorescent dissolved organic matter (fDOM), dissolved oxygen, specific conductance, phycocyanin fluorescence (fPC), turbidity, pH, and temperature. Categories: Data; Tags: Contaminants, HABS, Finger Lakes, New York, Owasco Lake, Surface-Water Quality Monitoring, All tags... United States, Water Quality, algae, algal blooms, chlorophyll fluorescence (fChl), continuously-measured, cyanobacteria, dissolved oxygen, fluorescent dissolved organic matter (fDOM), freshwater (surface), hazards, limnology, nitrate, nutrient content (water), oxygen content (water), phycocyanin fluorescence (fPC), spatial, specific conductance, surface water quality, synoptic, turbidity, water pH, water temperature, Fewer tags 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 Modelled Lake Powell releases and reservoir elevations under different alternative management scenarios These data were compiled for/to modeling efforts for U.S. Bureau of Reclamation National Environmental Policy Act (NEPA) analyses for the Colorado River in Grand Canyon, Arizona. Objective(s) of our study were to create revised monthly Lake Powell elevations and outflows from Bureau of Reclamation Colorado River Mid-term Modeling System (CRMMS) traces that incorporate the alternatives in the sEIS documents and indicate when potential actions may occur and how that changes water movement and storage. These data represent monthly hydrologies for Lake Powell: inflow, outflow, and elevation forecasts for 2024-2027, as well as volumes of water in outflows for different water mangement strategies in NEPA supplemental... Categories: Data; Tags: Arizona, Biota, Colorado River, Geography, Glen Canyon, All tags... Grand Canyon, Hydrology, Information Sciences, InlandWaters, Lake Powell, Lees Ferry, USGS Science Data Catalog (SDC), Water Resources, aquatic biology, data release, freshwater ecosystems, hydrographic datasets, invasive species, limnology, water budget, water quality, water temperature, Fewer tags Geochemical, grain size, lithological, bathymetric, reconstructed integrated vapor transport, and age model data for Leonard Lake, Mendocino County The data herein are geochemical (from X-Ray fluorescence spectrometry), grain size (percent clay, silt, sand), lithological (loss on ignition data), bathymetric, reconstructed IVT, and radioactive isotopes (14-C, 210-Pb, 226-Ra, and 137-Cs). These data were collected from sediments from Leonard Lake, Mendocino County, California, USA starting in 2014. Together, these data provide evidence for a record of extreme precipitation going back three millennia, showing regional pluvial and drought cycles. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Climatology, Geography, Hydrology, Limnology, All tags... USGS Science Data Catalog (SDC), biota, ecology, flooding, Fewer tags Duluth Entry: 10-meter Digital elevation model (DEM) of beach topography and near-shore bathymetry of Lake Superior at the Duluth Entry, Duluth, MN, September 2020 This dataset is a digital elevation model (DEM) of the beach topography and near-shore bathymetry of Lake Superior at the Duluth Entry, Duluth, Minnesota. The DEM has a 10-meter (m; 32.8084 feet) cell size and was created from a LAS dataset of terrestrial light detection and ranging (lidar) data representing the beach topography, and multibeam sonar data representing the bathymetry. The survey area extends approximately 0.85 kilometers (0.5 miles) offshore, for an approximately 1.87 square kilometer surveyed area. Lidar data were collected September 23, 2020 using a boat mounted Velodyne unit. Multibeam sonar data were collected September 22-23, 2020 using a Norbit integrated wide band multibeam system compact (iWBMSc)... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Duluth Entry: 5-meter Digital elevation model (DEM) of beach topography and near-shore bathymetry of Lake Superior at the Duluth Entry, Duluth, MN, September 2020 This dataset is a digital elevation model (DEM) of the beach topography and near-shore bathymetry of Lake Superior at the Duluth Entry, Duluth, Minnesota. The DEM has a 5-meter (m; 16.404 feet) cell size and was created from a LAS dataset of terrestrial light detection and ranging (lidar) data representing the beach topography, and multibeam sonar data representing the bathymetry. The survey area extends approximately 0.85 kilometers (0.5 miles) offshore, for an approximately 1.87 square kilometer surveyed area. Lidar data were collected September 23, 2020 using a boat mounted Velodyne unit. Multibeam sonar data were collected September 22-23, 2020 using a Norbit integrated wide band multibeam system compact (iWBMSc)... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Minnesota Point: Survey area of beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, MN, July 2020 This dataset is the survey area footprint for the beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, Minnesota. The survey footprint represents a LAS dataset of terrestrial light detection and ranging (lidar) of beach topography and multibeam sonar bathymetry to approximately 1 kilometer (0.62 miles) offshore, for an approximately 2.27 square kilometer surveyed area. The surveys were completed July 20 - July 23, 2020. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Microplastics in the surficial benthic sediment from Lake Michigan and Lake Erie, 2013 and 2014 This dataset describes the quantity, morphology, concentration and polymer identity of microplastics in surficial benthic sediment of Lake Michigan and Lake Erie. Lake Michigan sediment samples were collected at 20 locations in September, 2013 and Lake Erie sediment samples were collected at 12 locations in September, 2014 while on-board the R.V. Lake Guardian. Sampling and analysis methods are described in the Processing Steps section of the metadata. Categories: Data; Tags: Environmental Health, Lake Erie, Lake Michigan, Limnology, USGS Science Data Catalog (SDC), All tags... Water Quality, Water Resources, contamination and pollution, nonpoint-source pollution, Fewer tags Lake Erie Fish Community Data, 2013-2021 Assessing the distribution and abundance of both predator and prey (forage) fish species is a cornerstone of ecosystem-based fishery management, and supports decision making that considers food-web interactions. In support of binational Great Lakes fishery management the objectives of this survey were to: provide estimates of densities of key forage and predator species in the western basin of Lake Erie, to assess seasonal and spatial distributions of fishes in tandem with water quality information, and to assess year class strength. A systematic grid sampling approach with 41 stations was sampled via bottom trawl during June (Spring) and September (Autumn), starting in 2013. This data release adds 2021 data to... Categories: Data; Tags: Aquatic Biology, Biota, Bottom trawl survey, Ecology, Freshwater ecosystems, All tags... Inland Waters, Lake Erie, Limnology, Michigan, Ohio, Ontario, Population dynamics, USGS Science Data Catalog (SDC), fish AND field sampling, Fewer tags Mineralogic, grain-size, biologic, and stable isotopic analyses of core TOPGUN-SODA10 2A-K from Big Soda Lake, Nevada, USA These data were collected from the TOPGUN-SODA10 2AK core collected in 2010 by LacCore (University of Minnesota), the USGS. and the University of California (U.C.) Berkeley. The 8.9 meter length core had stable isotopes of oxygen and carbon sampled every 10 millimeters or so, and diatoms samples at every 50 millimeters to 200 millimeters depending on the depth in the core. mineralogic data were collected using X-ray diffraction and grain-size analysis were done at various depths. These data are used to interpret the Holocene and late Pleistocene hydrology and paleoclimate of the lake and the region. The interpretation can be found in: Rosen, M.R., Reidy, L., Starratt, S., Zimmerman, S., in review, Middle Holocene... Categories: Data; Tags: Aquatic Biology, Big Soda Lake, Central Nevada Desert Basins, Climatology, Diatoms, All tags... Geochemistry, Grain-size analysis, Hydrology, Lake coring, Limnology, Nevada, Piston and gravity coring, Sedimentology, Soda Lake East, Stratigraphy, USGS Science Data Catalog (SDC), Water Quality, X-Ray Diffraction, biota, carbonate isotopes, elevation, environment, Fewer tags Daily surface temperature predictions for 185,549 U.S. lakes with associated observations and meteorological conditions (1980-2020) Daily lake surface temperatures estimates for 185,549 lakes across the contiguous United States from 1980 to 2020 generated using an entity-aware long short-term memory deep learning model. In-situ measurements used for model training and evaluation are from 12,227 lakes and are included as well as daily meteorological conditions and lake properties. Median per-lake estimated error found through cross validation on lakes with in-situ surface temperature observations was 1.24 °C. The generated dataset will be beneficial for a wide range of applications including estimations of thermal habitats and the impacts of climate change on inland lakes. Categories: Data; Tags: AL, AR, AZ, Alabama, Aquatic Biology, All tags... Arizona, Arkansas, CA, CO, CT, California, Colorado, Connecticut, DC, DE, Delaware, District of Columbia, Ecology, FL, Florida, GA, Georgia, Hydrology, IA, ID, IL, IN, Idaho, Illinois, Indiana, Iowa, KS, KY, Kansas, Kentucky, LA, Limnology, Louisiana, MA, MD, ME, MI, MN, MO, MS, MT, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, NC, ND, NE, NH, NJ, NM, NV, NY, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, OH, OK, OR, Ohio, Oklahoma, Oregon, PA, Pennsylvania, RI, Rhode Island, SC, SD, South Carolina, South Dakota, TN, TX, Tennessee, Texas, US, USGS Science Data Catalog (SDC), UT, United States, Utah, VA, VT, Vermont, Virginia, WA, WI, WV, WY, Washington, Water Quality, Water Resources, West Virginia, Wisconsin, Wyoming, climate change, deep learning, environment, inlandWaters, machine learning, modeling, reservoirs, surface temperature, temperate lakes, temperature, water, water resources, Fewer tags LAS dataset of lidar, single-beam, and multibeam sonar data collected of Minnesota Point near the Superior Entry of Lake Superior, Duluth, MN, September 2021 This dataset is a LAS dataset containing light detection and ranging (lidar) data and sonar data representing the beach and near-shore topography of Minnesota Point near the Superior Entry of Lake Superior, Duluth, Minnesota. The LAS data sets were used to create a digital elevation model (DEM) of the approximately 2.27 square kilometer surveyed area. Lidar data were collected using a boat mounted Velodyne unit. Multibeam sonar data were collected using a Norbit integrated wide band multibeam system compact (iWBMSc) sonar unit. Single-beam sonar data were collected using a Ceescope sonar unit. All elevation data were collected September 15-17, 2021. Methodology similar to Wagner, D.M., Lund, J.W., and Sanks, K.M.,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Digital elevation models (DEMs) of beach topography and near-shore bathymetry of Minnesota Point, near the Superior Entry of Lake Superior, Duluth, MN, September 2021 This dataset represents post-nourishment digital elevation models (DEMs) of the beach topography and near-shore bathymetry of Minnesota Point near the Duluth Entry of Lake Superior, Duluth, Minnesota. The Lidar DEM has a 1-meter (m; 3.28084 feet) cell size and was created from a LAS dataset of terrestrial light detection and ranging (lidar) data representing the beach topography. The topobathy DEMs have a 10-meter (m; 32.8084 feet) or a 5-meter (m; 16.4042 feet) cell size, and were created from a combined LAS dataset of lidar data representing the beach topography, and single-beam and multibeam sonar data representing the bathymetry. The survey area extends approximately 1 kilometers (0.62 miles) offshore, for an... Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Evaluation of Hydrodynamic Mixing in Keswick Reservoir, California, 2021-22 California's State Water Resources Control Board (SWRCB) wishes to quantify how water and constituents introduced via the outflow from the Spring Creek Diversion Dam mix with water within Keswick Reservoir. Of primary interest is the degree of dilution that exists when this introduced flow reaches the main stem of Keswick Reservoir, and how this mixing is influenced by different operational parameters of the system. In addition to flows through the three relevant dams (Spring Creek Debris Dam, Keswick Dam, and Shasta Dam) that must be considered, there is additional flow entering the Spring Creek Arm of the Keswick Reservoir via two penstocks that carry water from Whiskeytown Lake - in a different watershed - to... Categories: Data; Tags: Contaminants, Hydrodynamics, Hydrology, Keswick Reservoir, Limnology, All tags... Redding, Rhodamine Dye, Sacramento River, Shasta Dam, Spring Creek Debris Dam, USGS Science Data Catalog (SDC), Water Quality, biota, three-dimensional numerical modeling, Fewer tags Pesticides and pesticide transformation product data from passive samplers deployed in 15 Great Lakes tributaries, 2016 This dataset includes pesticides and pesticide transformation products in 15 tributaries of the Great Lakes. Pesticides were monitored using polar organic chemical integrative samplers (POCIS) to estimate concentrations in water following standard protocols (Alvarez, 2010) in June and July 2016. POCIS extracts were analyzed for 225 chemicals (USGS National Water Quality Laboratory schedule 5437, Sandstrom and others, 2016), for which 129 chemicals also have POCIS uptake rates, allowing calculations of time-weighted mean concentration over the approximately 30 day deployment (Alvarez and others, 2008). Collectively, there were 97 chemicals detected, and time-weighted mean concentrations could be calculated for 95... Categories: Data; Tags: Bad River, Clinton River, Cuyahoga River, Environmental Health, Fox River, All tags... Genesee River, Grand River, Great Lakes, Indiana, Indiana Harbor canal, Lake Erie, Lake Huron, Lake Michigan, Lake Ontario, Lake Superior, Limnology, Maumee River, Michigan, Milwaukee River, Minnesota, New York, Ohio, Oswego River, River Rouge, Saginaw River, St. Joseph River, St. Louis River, USGS Science Data Catalog (SDC), Vermilion River, Water Resources, Wisconsin, contamination and pollution, dissolved contaminants, emerging contaminants, inlandWaters, legacy contaminants, passive samplers, pesticides, surface water, surface water quality, water chemistry, Fewer tags Larval fish and water profile data from Lake Huron in 2017 These data consist of larval fish and water profile data collected with a nearshore to offshore transect approach at 9 transects throughout Lake Huron. Larval fish and their stomach contents were identified, enumerated, and measured (if possible) using a dissecting microscope. These data were used to calculate densities of potential fish prey items (what is available in the environment) and compare that to what the fishes ate for selectivity analysis. Larval fish age estimation based on daily growth rings from otoliths was also conducted. These data are in raw form. The water profile data were collected using a bathythermograph and bin-averaged at the 1 m level. Environmental prey data are available at the following... Categories: Data; Tags: Aquatic Biology, Ecology, Lake Huron, Limnology, Michigan, All tags... Northwestern Lake Huron, Ontario, Planktonic Biota, Southwestern Lake Huron, USGS Science Data Catalog (SDC), Zooplankton, aquatic ecosystems, biota, community ecology, environment, field sampling, fish, fish, fisheries biology, food web, inlandWaters, invertebrates, invertebrates, plankton, population and community ecology, species diversity, specimen collecting, Fewer tags Cladophora biomass and supporting data collected in the Great Lakes, 2018 (ver. 1.1, September 2020) Note: An error was discovered in the BenthicBiomas Table, mostly in designation of BDLs and zeros. Data are undergoing further QC and the corrected dataset will be posted soon. This dataset records Cladophora and associated submerged aquatic vegetation (SAV) biomass collected approximately monthly during the growing season of 2018 at stations located along the U.S. shoreline of Lakes Michigan, Huron, Erie, and Ontario. It also records a variety of supporting data collected at Cladophora measurement stations. These supporting data include: - seasonal time series of light, currents, wave action, temperature, specific conductivity, turbidity, pH, phycocyanin, chlorophyll, and dissolved oxygen from moored sensors... Categories: Data, Data Release - Revised; Tags: Aquatic Biology, CTD measurement, Ecology, Great Lakes Region, Lake Erie, All tags... Lake Huron, Lake Michigan, Lake Ontario, Limnology, USGS Science Data Catalog (SDC), Water Quality, acoustic Doppler current profiling, algae, algal blooms, aquatic biology, aquatic vegetation, benthos, biota, environment, eutrophication, freshwater ecosystems, habitat alteration, inlandWaters, invasive species, mollusks, nuisance species, nutrient content (water), optical methods, oxygen content (water), phosphorus, submerged aquatic vegetation, surface water quality, suspended material (water), turbidity, water pH, water sampling, water temperature, Fewer tags Cyanotoxin, chlorophyll-a, and cyanobacterial toxin genetic data for samples collected at eleven large river sites throughout the United States, June through October 2018 This U.S. Geological Survey (USGS) data release provides discretely measured cyanotoxin, chlorophyll-a, and cyanobacterial toxin genetic data for samples collected from eleven large river sites throughout the United States, from June through October 2018. Discrete water-quality samples were analyzed for cyanotoxins (anatoxin, cylindrospermopsin, microcystin, and saxitoxin), chlorophyll-a, and cyanobacterial toxin genetics as part of a National Water-Quality Assessment Project pilot study to describe cyanobacteria and cyanotoxin occurrence in the Nation's large rivers. Categories: Data; Tags: Anatoxin, Aquatic Biology, California, Chattahoochee River near Whitesburg, GA, Chlorophyll-a, All tags... Connecticut, Connecticut River at Thompsonville, CT, Contaminants, HABS, Cyanotoxin genetics, Cyanotoxins, Cylindrospermopsin, Delaware River at Trenton, NJ, Discretely measured, Dolichospermum (formerly Anabaena), Ecology, Environmental Health, Enzyme-linked immunosorbent assay (ELISA), Genetics, Georgia, Kansas, Kansas River at De Soto, KS, Limnology, Maryland, Microcystin, Microcystis, Minnesota, Mississippi River at Hastings, MN, Missouri, Missouri River at Hermann, MO, New Jersey, Ohio, Ohio River at Cannelton Dam at Cannelton, IN, Oregon, Pheophytin-a, Phytoplankton community composition, Planktothrix, Quantitative polymerase chain reaction (qPCR), Sacramento River at Freeport, CA, Saxitoxin, Susquehanna River at Conowingo, MD, Texas, Trinity River below Dallas, TX, USGS Science Data Catalog (SDC), USGS Station ID 01184000, USGS Station ID 01463500, USGS Station ID 01578310, USGS Station ID 02338000, USGS Station ID 03303280, USGS Station ID 05331580, USGS Station ID 06892350, USGS Station ID 06934500, USGS Station ID 08057410, USGS Station ID 11447650, USGS Station ID 14211720, United States, Water, Water Quality, Water Quality, Water quality, Willamette River at Portland, OR, anaC gene, cyrA gene, mcyE gene, sxtA gene, Fewer tags Bathymetric and Topographic Survey of the Platte River and associated chutes near the Nebraska Army National Guard Camp Ashland Training Site, 2019-2020 These data are the survey results from a five-mile section of the Platte River at, and upstream of the Nebraska Army National Guard Camp Ashland Training Site including the side channel chutes on the east bank. All survey data were collected along planned transect lines that were spaced 492.125 US survey feet apart beginning near the mouth of the Elkhorn River and ending near the U.S. Highway 6 bridge. An effort was made to get complete elevation data for each transect from top of bank to top of bank. Survey grade Global Navigation and Satellite Systems (GNSS) receiving antennas connected to a real time network (RTK high precision network https://hprtk.net) were used to measure elevation along the transects, at... Categories: Data; Tags: Ashland East, Elkhorn, GPS measurement, Geomorphology, Global Positioning System (GPS) observations, All tags... Land Use Change, Limnology, Lower Platte, Nebraska, Platte River, Saunders, USGS Science Data Catalog (SDC), Water Resources, bathymetry, bathymetry measurement, geoscientificInformation, geospatial datasets, inlandWaters, land surveying, multibeam sonar, surface-water (non-marine), surface-water level, Fewer tags 1 2 3 4 5 ... 9 »