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High-resolution spatial water-quality and discrete phytoplankton data, Owasco Lake, Seneca Lake, and Skaneateles Lake, Finger Lakes Region, New York, 2018-2019 From August 2018 to October 2019, the U.S. Geological Survey collected spatially high-resolution water quality data as part of five shoreline synoptic surveys around the perimeters of Owasco, Seneca, and Skaneateles Lakes within the Finger Lakes Region of New York. Water-quality data were collected just below water surface utilizing YSI EXO2 multiparameter sondes and portable nitrate sensors paired with real-time GPS data as part of a HABs monitoring program in the Finger Lakes. In October 2019, water-quality data collection was paired with discrete phytoplankton grab samples on Owasco Lake and Seneca Lake. Phytoplankton grab samples were collected just below water surface with a peristaltic pump at twelve locations... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Contaminants, HABS, Finger Lakes, Limnology, New York, All tags... Owasco Lake, Seneca Lake, Skaneateles Lake, Surface-Water Quality Monitoring, USGS Science Data Catalog (SDC), United States, Water Quality, Water Quality, Water Resources, algae, algal blooms, chlorophyll, class, continuously-measured, cyanobacteria, dissolved oxygen, division, family, fluorescent dissolved organic matter (fDOM), freshwater (surface), genus, hazards, lake ecosystems, limnology, nitrate, nutrient content (water), order, oxygen content (water), phycocyanin, phycology, phytoplankton, spatial, species, specific conductance, surface water quality, synoptic, taxa, taxonomy, turbidity, water pH, water temperature, Fewer tags 11: Streamwater sample constituent concentration outliers from 15 watersheds in Gwinnett County, Georgia for water years 2003-2020 This dataset contains a list of outlier sample concentrations identified for 17 water quality constituents from streamwater sample collected at 15 study watersheds in Gwinnett County, Georgia for water years 2003 to 2020. The 17 water quality constituents are: biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), suspended sediment concentration (SSC), total nitrogen (TN), total nitrate plus nitrite (NO3NO2), total ammonia plus organic nitrogen (TKN), dissolved ammonia (NH3), total phosphorus (TP), dissolved phosphorus (DP), total organic carbon (TOC), total calcium (Ca), total magnesium (Mg), total copper (TCu), total lead (TPb), total zinc (TZn), and total dissolved solids... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gwinnett County, State of Georgia, inlandWaters, surface water quality Water quality, quantity, and gas fluxes of the Upper Mississippi River basin (WY 2012-2016) This product consists of one tabular dataset and associated metadata of water quality information related to rivers, streams, and reservoirs in the Upper Mississippi River watershed between 2012 and 2016. This data release is a part of a national assessment of freshwater aquatic carbon fluxes. Data consist of organic and inorganic carbon related species, carbon dioxide and methane gas fluxes calculated from manual chamber measurements, nitrogen species, carbon isotopes, oxygen isotopes, cations, anions, trace metals, and various in situ measurements including: pH, water temperature, air temperature, barometric pressure, dissolved oxygen, turbidity, fluorescent dissolved organic matter, and specific conductance.... Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Carbon, Fluorescent Dissolved Organic Matter (fDOM), Minnesota, Shingobee, Shingobee Headwaters Aquatic Ecosystems Project, All tags... Shingobee River Headwaters Region, Surface Water Quality, USGS Science Data Catalog (SDC), Upper Mississippi River Basin, Upper Mississippi River Basin Project, WATER QUALITY/WATER CHEMISTRY, Wisconsin, air temperature, alkalinity, aluminum, ammonium, atmospheric carbon dioxide, atmospheric methane, barium, boron, calcium, carbon dioxide (water), carbon dioxide (water), carbon dioxide flux, carbon isotopes, chloride, deuterium, dissolved oxygen, fluorescence index, greenhouse gas flux, hydrophilic organic acid, hydrophobic organic acid, hydrophobic organic neutral, inorganic carbon, magnesium, manganese, methane flux, nitrate, organic carbon, oxygen isotopes, pH (water), potassium, silicon dioxide, sodium, specific conductance, strontium, sulfate, sulfur, total dissolved nitrogen, total iron, transphilic organic acid, turbidity, ultraviolet-visible absorbance, water quality, water temperature, Fewer tags Streamgage and basin outline shapefiles for the Red River of the North This data shows select streamgage locations throughout the Red River of the North Basin upstream of Emerson, Manitoba, and basin outlines for eight subbasins.. Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Crookston, Emerson, Fargo, Halstad, Kindred, All tags... Manitoba, Minnesota, Neche, North Dakota, Pembina River, Red Lake River, Red River of the North, Sheyenne River, phosphorus, surface water quality, Fewer tags Selected sediment data and results from regression models, modified Einstein Procedure, and loads estimation for the Nemadji River, 1973-2016 This data set includes new and historical sediment data collected at the U.S. Geological Survey (USGS) streamgage on the Nemadji River near South Superior, Wisconsin (station number 04024430) from 1973 through 2016. The data were used in a comparison study of stream sediment collection and laboratory techniques for characterizing suspended sediment, bedload, and total sediment loads. Data results included in this data release include 1) suspended-sediment concentration data collected in 2015-16 using U.S. Geological Survey and Wisconsin and Minnesota Department of Natural Resources (DNR) methods; 2) streambed material particle size, measured bedload, total sediment loads, and model archive for the modified Einstein... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: City of Superior, Douglas County, Lake Superior, Minnesota, USGS Science Data Catalog (SDC), All tags... Water Resources, Wisconsin, river systems, surface water quality, suspended material (water), Fewer tags pH raster of Old Erie Canal This child item dataset contains a pH raster interpolated from water quality observation points collected during the 2018 survey of the Old Erie Canal. This data release contains spatial datasets of bathymetry, water velocity, water quality, and infrastructure of a 30.8 mile reach of the Old Erie Canal between the Town of DeWitt and its junction with the current Erie Canal of the New York State Canal System in Verona, near Rome, New York during 2018 and 2019. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Groundwater and Streamflow Information, Madison County, New York, Old Erie Canal, Oneida County, All tags... Onondaga County, SW Model, Surface-Water Modeling, United States, geospatial datasets, hydrology, surface water quality, turbidity, Fewer tags 2019 Hydrologic Data Summary for the Central Pine Barrens Region, Suffolk County, New York This dataset has been archived; it has been superseded by version 1.1 (December 2022) which can be found at https://doi.org/10.5066/P9KODN4C. This U.S. Geological Survey data release provides surface-water quality, streamflow, and groundwater-elevation data collected within the Central Pine Barrens (CPB) Region of Suffolk County, New York. The data were collected in cooperation with the Central Pine Barrens Commission and the Town of Brookhaven as part of a five-year comprehensive water-resources monitoring program. Water quality and quality-assurance data from seven sites on two rivers (Carmans River- 5 sites and Peconic River - 2 sites) in the CPB are included. Carmans River sites were sampled four times throughout... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Carmans River, Central Pine Barrens, Environmental Health, Hydrology, Long Island, All tags... New York, Peconic River, Pine Barrens, Suffolk County, USGS Science Data Catalog (SDC), United States, Water Quality, environmental health, river, stream, surface water, surface water quality, water quality, water quality, Fewer tags Stream cross-section, benthic macroinvertebrate and fish taxa counts and abundance, and water chemistry data for the Clarksburg study area in Montgomery County, Maryland, 1992 - 2020 (ver. 1.1, April 2022) Montgomery County, Maryland Department of Environmental Protection has collected datasets to assess the health of streams since the early 1990s. Datasets include geomorphic stream cross-sectional surveys, fish and benthic macroinvertebrate counts and taxa abundance, and water chemistry data collected at the time of benthic and fish sampling (dissolved oxygen, pH, specific conductance, air temperature, and water temperature). Data span years 1992 to 2020 at five watersheds within the Clarksburg study area. Watersheds include a forested reference site (Soper), an urban site with centralized stormwater management (Crystal Rock), and three treatment watersheds (TR104, TR109, and Cabin Branch) within the Clarksburg Special... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Clarksburg, Maryland, Montgomery County, Montgomery County, USGS Science Data Catalog (SDC), All tags... Upper Chesapeake Bay, benthic ecosystems, biota, geomorphology, surface water quality, Fewer tags Data Release: Water Quality and Estimated Changes in the Plum Creek Watershed 2010-2020 This section of the data release supports the data used in models for the associated publication. The U.S. Geological Survey and the University of Wisconsin – Green Bay collected hydrologic and water-quality data to assess the effectiveness of agricultural conservation management practice (CMP) implementation at Mainstem Plum Creek (USGS site ID: 04084911) and West Plum Creek (USGS site ID: 04084927) in northeastern Wisconsin. Monitoring data from 2010–2020 at Mainstem Plum and 2013–2020 at West Plum were used to detect changes in hydrologic and water-quality responses during runoff events. Runoff events were defined by hydrographers and used to compute event loads and event flow-weighted mean concentrations of... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Lake Michigan, Wisconsin, agriculture, erosion, nutrient content (water), All tags... precipitation (atmospheric), stream discharge, surface water quality, suspended material (water), Fewer tags 13: Models coefficients and statistics for regression models used to estimate streamwater loads for 12 water-quality constituents in 13 watersheds in Gwinnett County, Georgia for water years 2003-2020 The dataset contains model coefficients and statistics for the 488 regression models used to estimate streamwater constituent loads for 13 watersheds in Gwinnett County, Georgia for two calibration periods, water years 2003-2010 and 2010-2020. Model terms were selected from an 11-parameter equation, which was a function of discharge, base flow, season, turbidity, and time (trend), using a forward stepwise ordinary least squares regression approach. Model coefficients were fit using U.S. Geological Survey (USGS) LOADEST load estimation software. Models were fit both with and without turbidity explanatory variables for 12 water-quality constituents: total suspended solids, suspended sediment concentration, total nitrogen,... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gwinnett County, State of Georgia, inlandWaters, mathematical modeling, streamflow, All tags... surface water quality, Fewer tags Vertical Profiles and Near Surface Water Quality Transects for Dissolved Oxygen Monitoring of the Arthur Kill, New York and New Jersey, September 7th and 8th, 2023 Transects of near-surface continuous water-quality data and vertical profiles of the same parameters were collected over a 24-hour period from September 7 to September 8, 2023 in the Arthur Kill. The Arthur Kill is a tidal strait located between Staten Island, New York, and Union and Middlesex Counties, New Jersey, and connects Newark Bay to the north and Raritan Bay to the south. It is a major shipping channel for the Port of New York and New Jersey surrounded by industrial and highly developed land. Transects were collected using a Yellow Springs Instruments (YSI) EXO2 series water-quality sonde with a 5-second data collection interval while the boat was in motion. Vertical profiles of water-quality parameters... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arthur Kill, Dissolved Oxygen, Ecosystem Health, Ecosystem Health, Middlesex County, All tags... Near-surface, New Jersey, New York, Newark Bay, Raritan Bay, Specific Conductance, Staten Island, Surface water quality, Surface-Water Monitoring, Transect, Turbidity, USGS Science Data Catalog (SDC), Union County, United States, Vertical Profile, Water Quality, Water Quality, Water Temperature, Water quality, pH, Fewer tags Streamflow Gain Loss Data Used in the Pecos River Basin Salinity Assessment from Santa Rosa Lake, New Mexico to the Confluence of the Pecos River and the Rio Grande, Texas, 2015 This part of the data release contains historical streamflow data compiled from the literature and evaporation loss estimates used in the streamflow gain loss equation. These digital data accompany Houston, N.A., Thomas, J.V., Ging, P.B., Teeple, A.P., Pedraza, D.E., and Wallace, D.S., 2019, Pecos River Basin Salinity Assessment, Santa Rosa Lake, New Mexico to the Confluence of the Pecos River and the Rio Grande, Texas,2015: U.S. Geological Survey Scientific Investigations Report 2019-5071, https://doi.org/10.3133/sir20195071. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Andrews County, Avalon Lake, Black River, Blue Hole, Brantley Lake, All tags... Brewster County, Chaves County, Crane County, Crockett County, Culberson County, Curry County, DeBaca County, Delaware River, Ector County, Eddy County, El Rito Creek, Guadalupe County, Independence Creek, Jeff Davis County, Lake Amistad, Lake Sumner, Lea County, Lincoln County, Live Oak Creek, Loving County, Mora County, New Mexico, North Seven Rivers, Otero County, Pecos County, Pecos River, Presidio County, Quay County, Reagan County, Red Bluff Reservoir, Reeves County, Rio Felix, Rio Grande, Rio Hondo, Rio Penasco, Roosevelt County, Salt Creek (N. Mex.), Salt Creek (Tex.), San Miguel County, Santa Fe County, Santa Rosa Lake, South Seven Rivers, Taiban Creek, Tecolote Creek, Terrell County, Texas, Torrance County, Upton County, Val Verde County, Ward County, Winkler County, aquifer, biota, environment, geochemistry, geoscientificInformation, hydrogeology, salinity, surface water, surface water quality, water quality, water resources, Fewer tags Pesticides, pharmaceuticals, and wastewater indicator compounds in water and bottom sediment samples collected from Great Lake tributaries, 2019 This dataset consists of select contaminants of emerging concern (CEC) including pesticides and transformation products, pharmaceuticals and transformation products, and wastewater indicator compound results measured in 131 surface water, 129 bottom sediment, 7 field replicate, and 6 field blank samples collected from 131 sites located on 27 tributaries of the Great Lakes during the summer of 2019. Samples were analyzed at the U.S. Geological Survey National Water Quality Laboratory (NWQL). Surface water samples were collected and analyzed for 238 pesticides, pesticide transformation products, and surrogate compounds (NWQL laboratory schedule 2437; Sandstrom and others, 2015), 152 pharmaceuticals, pharmaceutical... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Au Gres River, Buffalo River, Cattaraugus River, Chippewa River, East Twin River, All tags... Eighteenmile River, Elk River, Escanaba River, Galien River, Genesee, Grand River, Great Lakes, Huron River, Indiana, Johnson, Lake Erie, Lake Huron, Lake Michigan, Lake Ontario, Manistee River, Manistique River, Michigan, New York, Oak Orchard, Ohio, Ontonagon River, Pennsylvania, Pinnebog River, Root River, Saginang River, Saint Joseph River, Salt River, Seney Refuge River, Tonawanda River, USGS Science Data Catalog (SDC), Vermillion River, West Twin River, Whitefish, Wisconsin, contamination and pollution, dissolved contaminants, none, pesticide and herbicide contamination, pharmaceutical contamination, surface water quality, water quality, Fewer tags Microplastics in Lake Mead National Recreation Area, 2017-2018: U.S. Geological Survey data release This dataset describes the quantity and morphology of microplastics in water, surficial sediment, sediment core, fish, and shellfish samples from Lake Mead National Recreation Area (Nevada/Arizona). Water and surficial sediment samples were collected once at 9 locations. A sediment core (33 cm long) was extracted from Las Vegas Bay to assess changes in microplastic deposition over time. Striped bass (Morone saxatilis), common carp (Cyprinus carpio), quagga mussels (Dreissena bugensis), and Asian clams (Corbicula fluminea) were sampled at a subset of locations to assess biological uptake of microplastics. Sampling and analysis methods are described in the Processing Steps section of the metadata. All samples were... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Environmental Health, Lake Mead, Lower Colorado, USGS Science Data Catalog (SDC), Water Quality, All tags... Water Resources, biota, contamination and pollution, inlandWaters, microplastics, surface water quality, Fewer tags 10: Laboratory standard reference samples for the Gwinnett County, Georgia study for years 2014-2020 This dataset contains laboratory standard reference sample concentrations analyzed by RTI Laboratories, the analytical laboratory used by the Gwinnett County, Georgia study. These water-quality-control samples are part of the U.S. Geological Survey (USGS) Standard Reference Samples (SRS) Project inter-laboratory comparison study. RTI Laboratories sample concentrations along with the included inter-laboratory result statistics (for most probable value and standard error) can be used to assess the laboratory’s analytical precision and bias. Sample concentrations are reported for 12 constituents for 13 round-robin sample rounds, in which prepared samples are sent to participating laboratories twice per year, and were... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gwinnett County, State of Georgia, inlandWaters, laboratory quality control, materials standards, All tags... surface water quality, Fewer tags 15: Streamwater load and yield estimates for 12 constituents in 13 watersheds in Gwinnett County, Georgia for water years 2003-2020 The dataset contains annual and model calibration period streamwater constituent load and yield estimates for 13 watersheds in Gwinnett County, Georgia for the water years 2003 to 2020. Loads and yields were estimated for 12 water-quality constituents: total suspended solids, suspended sediment concentration, total nitrogen, total nitrate plus nitrite, total phosphorus, dissolved phosphorus, total organic carbon, total calcium, total magnesium, total lead, total zinc, and total dissolved solids. The USGS LOADEST load estimation software, which employs a regression-model estimation approach, was used for constituents that had at least a minimal relation with the model explanatory variables, as indicated by concentration... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gwinnett County, State of Georgia, inlandWaters, mathematical modeling, streamflow, All tags... surface water quality, watershed, Fewer tags Per- and polyfluoroalkyl substances (PFAS) and pharmaceutical compound data from passive and sediment samples from 62 Great Lakes tributary sites collected in 2018 This dataset includes per-and polyfluoroalkyl substances (PFAS) and pharmaceuticals monitored at 62 sampling sites in tributaries of the Laurentian Great Lakes. Chemicals were evaluated in a sediment sample (PFAS only) and water concentrations were estimated using polar organic chemical integrative samplers (POCIS). Sediment samples were collected from the 62 sites in June and July 2018, which were analyzed for 23 PFAS compounds using liquid chromatography tandem mass spectrometry (LC/MS/MS). Duplicate sediment samples were collected at 23 sites. Overall, 22 of the 23 sediment PFAS compounds analyzed were detected in samples from at least one site. Pharmaceuticals and PFAS samples were collected instream by deploying... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Great Lakes, Indiana, Lake Erie, Lake Huron, Lake Michigan, All tags... Lake Ontario, Lake Superior, Michigan, Minnesota, New York, Ohio, USGS Science Data Catalog (SDC), Water Quality, Wisconsin, contamination and pollution, dissolved contaminants, emerging contaminants, inlandWaters, legacy contaminants, passive samplers, per- and polyfluoroalkyl substances, pharmaceuticals, streambed sediment, surface water, surface water quality, water chemistry, Fewer tags 2018 Hydrologic Data Summary for the Central Pine Barrens Region, Suffolk County, New York (ver. 2.0, February 2024) This document provides a summary of surface water-quality, streamflow, and groundwater data collected by the U.S. Geological Survey (USGS) within the Central Pine Barrens (CPB) Region of Suffolk County, New York. The data were collected in cooperation with the Central Pine Barrens Commission and the Town of Brookhaven under a five-year comprehensive water resources monitoring program. The surface water-quality data within the CPB for the 2018 water year (October 1, 2017 to September 30, 2018) includes data from the Carmans River and the Peconic River. The streams were sampled several times throughout the year at seven pre-determined locations. The Carmans River was sampled at five locations: 1) CARMANS RIVER AT... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Carmans River, Central Pine Barrens, Long Island, New York, Peconic River, All tags... Pine Barrens, Suffolk County, USGS Science Data Catalog (SDC), United States, Water Quality, Water Quality, Water Quality, Water Resources, Water-Quailty Modeling, emerging contaminants, environmental health, groundwater quality, river, stream, surface water, surface water quality, water quality, Fewer tags Water Quality, Streamflow Gain Loss, Geologic, and Geospatial Data Used in the Pecos River Basin Salinity Assessment from Santa Rosa Lake, New Mexico to the Confluence of the Pecos River and the Rio Grande, Texas, 1900-2015 This Data Release contains various types of hydrologic and geologic data from the Pecos River Basin during1900–2015, including water-quality data compiled and synthesized from various sources (including data from water-quality samples collected by the USGS in 2015 from 26 sites), streamflow gain-loss data collected by the USGS in 2015 and historical streamflow gain-loss data compiled from the literature, the horizontal extent of and depth to the base of the 16 geologic and hydrogeologic units that underlie the study area, and geospatial data collected by the USGS. The data were used to complete a detailed salinity assessment of the Pecos River from Santa Rosa Lake, New Mexico to the Confluence of the Pecos River... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Andrews County, Avalon Lake, Black River, Blue Hole, Brantley Lake, All tags... Brewster County, Chaves County, Crane County, Crockett County, Culberson County, Curry County, DeBaca County, Delaware River, Ector County, Eddy County, El Rito Creek, Guadalupe County, Independence Creek, InlandWaters, Jeff Davis County, Lake Amistad, Lake Sumner, Lea County, Lincoln County, Live Oak Creek, Loving County, Mora County, New Mexico, North Seven Rivers, Otero County, Pecos County, Pecos River, Presidio County, Quay County, Reagan County, Red Bluff Reservoir, Reeves County, Rio Felix, Rio Grande, Rio Hondo, Rio Penasco, Roosevelt County, Salt Creek (N. Mex.), Salt Creek (Tex.), San Miguel County, Santa Fe County, Santa Rosa Lake, South Seven Rivers, Taiban Creek, Tecolote Creek, Terrell County, Texas, Torrance County, USGS Science Data Catalog (SDC), Upton County, Val Verde County, Ward County, Winkler County, aquifer, aquifer base, aquifer depth, environment, geochemistry, geology, geoscientificInformation, geospatial analysis, geospatial datasets, groundwater, groundwater quality, hydrogeology, lithology, salinity, surface water, surface water quality, water quailty, water resources, Fewer tags Water-quality trends and trend component estimates for the Nation's rivers and streams using Weighted Regressions on Time, Discharge, and Season (WRTDS) models and generalized flow normalization, 1972-2012 Nonstationary streamflow due to environmental and human-induced causes can affect water quality over time, yet these effects are poorly accounted for in water-quality trend models. This data release provides instream water-quality trends and estimates of two components of change, for sites across the Nation previously presented in Oelsner et al. (2017). We used previously calibrated Weighted Regressions on Time, Discharge, and Season (WRTDS) models published in De Cicco et al. (2017) to estimate instream water-quality trends and associated uncertainties with the generalized flow normalization procedure available in EGRET version 3.0 (Hirsch et al., 2018a) and EGRETci version 2.0 (Hirsch et al., 2018b). The procedure... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Contiguous United States and Puerto Rico, USGS Science Data Catalog (SDC), United States, biota, carbon, All tags... concentration, loads (fluxes), major ions, nutrients, rivers, salinity, sediment, streams, surface water quality, water-quality trends, Fewer tags 1 2 3 »