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Coastal Salinity Index for Monitoring Drought To address the data and information gap for characterizing coastal drought, a coastal salinity index (CSI) was developed using salinity data (Conrads 2016; Conrads and Darby, 2017). The CSI uses an approach similar to the Standardized Precipitation Index (SPI), a readily available drought index that is widely used for monitoring meteorological droughts (McKee and others, 1993). The CSI substitutes total monthly precipitation with monthly mean salinity data to determine the probability of recording a given salinity value in a particular month. The initial investigation demonstrated that the index could be used to delineate short- and long-term drought (saline) and wet (high freshwater inflow) conditions; however,... Categories: Data; Tags: Everglades National Park, USGS Science Data Catalog (SDC), brackish, ecology, estuary, All tags... field monitoring stations, mesohaline, oligohaline, salinity, water quality, Fewer tags Geospatially derived environmental characteristics to prioritize watersheds for research and monitoring needs within 18 hydrologic regions across the United States Water availability for human and ecosystem needs is a function of both water quantity and water quality, as described in the U.S. Geological Survey (USGS) Water Science Strategy (Evenson and others, 2013). Recently, a quantitative approach to prioritize candidate watersheds for monitoring investment was developed to understand changes in water availability and advance the objectives of new USGS programs (Van Metre and others, 2020). In this study design, the contiguous United States (CONUS) was divided into 18 regions (referred to here as “hydrologic regions” or “HRs”) with relatively homogeneous hydrologic drivers and processes to represent the wide diversity in conditions that exist across the CONUS. The gap analysis... Categories: Data; Tags: Ecology, Geochemistry, Hydrology, USGS Science Data Catalog (SDC), United States, All tags... Water Quality, Water Resources, contaminants of emerging concern, geogenics, geoscientificInformation, geospatial datasets, hydrologic region, inlandWaters, nutrient content (water), salinity, sediment transport, water temperature, Fewer tags Time-domain electromagnetic soundings to delineate saline groundwater in the Genesee valley-fill aquifer system, New York (2016-2017) In October and November 2016-2017, transient electromagnetic (TEM) data, also called time domain electromagnetic (TDEM) surveys, were acquired at 120 locations in the Genesee Valley, Livingston County, New York, in order to characterize the subsurface resistivity structure in support of a U.S. Geological Survey groundwater investigation. The TEM data were collected as part of a project to evaluate geophysical methods to characterize the valley-fill sediments, underlying bedrock, and salinity of the subsurface. TEM data were collected using an ABEM WalkTEM unit (acquisition software V 1.1.0 and newer) using two transmitter loop (Tx) sizes, 100 by 100 meter square and 40 by 40 meters square, a center-loop receiver... Categories: Data; Tags: Aquifer Mapping, Electromagnetic surveying, Genesee River Valley, Geophysics, Geophysics, All tags... Groundwater, Hydrogeologic Characterization, Livingston County, New York, Resistivity, Salinity, Surface Geophysics, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Compilation of multi-agency specific conductance observations for streams within the Chesapeake Bay watershed Freshwater salinization is an emerging issue for freshwater environments in the Chesapeake Bay, USA region. Salinization is often described by measurements of specific conductance (SC). This data release contains specific conductance observations collected by multiple regional agencies for streams within the Chesapeake Bay Watershed. This inventory compiles and harmonizes data from the Water Quality Portal (WQP), which is a data repository developed by the National Water Quality Monitoring Council and supported by the U.S. Environmental Protection Agency and U.S. Geological Survey, and the U.S. Geological Survey National Water Information System (NWIS). Both discrete measures of SC, which are single measures taken... Categories: Data; Tags: Chesapeake Bay watershed, Delaware, District of Columbia, Hydrology, Maryland, All tags... New York, Pennsylvania, USGS Science Data Catalog (SDC), United States, Virginia, Water Quality, Water Resources, West Virginia, biota, environment, freshwater ecosystems, inlandWaters, salinity, surface water quality, Fewer tags Autonomous Underwater Vehicle Water-Quality and Sonar Measurements alongside Conductivity, Temperature and Depth Measurements in the Delaware River near Philadelphia, Pennsylvania, 2021 These datasets were created in support of the U.S. Geological Survey's (USGS) Next Generation Water Observing System (NGWOS) for the Delaware River Basin pilot study (Eberts, Wagner, and Woodside, 2019). The NGWOS utilizes real-time data, improved computational capabilities, and new technologies such as unmanned aerial vehicles (UAV) and autonomous underwater vehicles (AUV) to provide information on water quality and/or quantity, in more locations, quickly and efficiently (Eberts, Wagner, and Woodside, 2019). Combined with advanced modeling applications, the NGWOS will be an important tool for water-resource managers and emergency management. In this study, water-quality and bathymetric data were measured with an... Categories: Data; Tags: Delaware, Delaware County, Delaware River, Hydrology, New Castle County, All tags... Philadelphia, Philadelphia County, USGS Science Data Catalog (SDC), environment, ngwos, oxygen content (water), river systems, salinity, water chemistry, water quality, Fewer tags Ephemeral Stream Channel Stability Data from the Grand Valley, Western Colorado, 2018-21 This U.S. Geological Survey (USGS) data release provides the data used to predict areas with the greatest probability of ephemeral stream channel instability on north side of the Grand Valley in western Colorado, during 2018-20. The USGS developed a method for automatically extracting channel cross-section geometry from existing remotely sensed terrain models. Based on estimated flood stage and surrogate streamflows, hydraulic characteristics were calculated. The channel geometries and hydraulic characteristics were used to estimate channel stability using a statistical model. Cross-section stabilities were determined from a stream channel stability assessment for a subset of 1,406 visited (field observed) locations... Tags: Colorado, Geomorphology, Grand Valley, USGS Science Data Catalog (SDC), United States, All tags... channel stability, environment, ephemeral streams, logistic regression, salinity, Fewer tags Time-Domain Electromagnetic Data Collected in the U.S. Part of the Mesilla Basin/Conejos-Médanos Aquifer System in Doña Ana County, New Mexico, and El Paso County, Texas, November 2012 The transboundary Mesilla Basin/Conejos-Médanos aquifer system was identified as one of the priority transboundary aquifer systems for additional study by the United States and Mexico U.S.-Mexico Transboundary Aquifer Assessment Act of 2006 (United States-Mexico Transboundary Aquifer Act, Public Law 109-448). As one of the largest rechargeable groundwater systems by total available volume in the Rio Grande/Rio Bravo del Norte Basin region of the United States and Mexico, the Mesilla Basin/Conejos-Médanos aquifer system supplies water for irrigation as well as municipal use in El Paso, Texas; Las Cruces, New Mexico; and Ciudad Juárez, Chihuahua, Mexico (Alley, 2013). The U.S. Geological Survey in cooperation with... Categories: Data; Tags: Doña Ana County, El Paso, El Paso County, Mesilla Basin, New Mexico, All tags... Rio Grande, Sunland Park, Texas, USGS Science Data Catalog (SDC), electromagnetic, resistivity, salinity, time-domain, Fewer tags Data used to estimate groundwater salinity above the Montebello Oil Field (California, USA) This release contains borehole geophysical electrical log data (elogs), total dissolved solids sample data (TDS), and geostatistical program files used to estimate the salinity distribution in groundwater above and in the vicinity of the Montebello Oil Field, located near Los Angeles, California, USA. Original data are drawn from a variety of publicly available sources and are combined here for use in geostatistical simulation and estimation. The extent of the estimation area is a 3-mile buffer zone surrounding the Montebello Oil Field administrative boundary, and the subsurface aquifer region lying above locally mapped oil-bearing units. The data compilation and analysis were done as part of the California State... Tags: Borehole Geophysics, Geophysics, Groundwater and Streamflow Information, Hydrology, Los Angeles, All tags... Southern California Coastal, USGS Science Data Catalog (SDC), Water, Water Quality, Water Resources, borehole logging, environment, geophysics, geoscientificInformation, groundwater, groundwater quality, inlandWaters, salinity, statistical analysis, Fewer tags Microcystin, chlorophyll, and cell-count data for assessing the effect of salinity tolerance on cyanobacteria associated with a harmful algal bloom in Lake Okeechobee, Florida, July 9 to 17, 2017 This U.S. Geological Survey (USGS) Data Release provides microcystin, chlorophyll, and cell-count data for assessing the effect of salinity tolerance on cyanobacteria associated with a harmful algal bloom in Lake Okeechobee, Florida. All data are reported as raw measured values and are not rounded to USGS significant figures. Water and algal bloom material were collected from Lake Okeechobee, Florida on July 7, 2017. This dataset includes measurements of subsamples taken in the laboratory, collected July 9 to July 17, 2017, at nine different salinity concentrations. Categories: Data; Tags: Chlorophyll, Cyanobacteria, Dolichospermum, Florida, Harmful Algal Bloom, All tags... Lake Okeechobee, Microcystin, Microcystis, Pheophytin, Salinity, USGS Science Data Catalog (SDC), United States, Fewer tags Compilation of estuarine salinity data for sites used in RESTORE Streamflow alteration assessments Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P9G2MFRX. Salinity and variability of salinity in shallow waters shape living resources and habitat within Gulf of Mexico estuaries. The salinity gradient is widely recognized as foundational in maintaining biological diversity and productivity of estuaries. A clear understanding of the factors controlling salinity and variability of salinity in estuarine surface waters is essential for proper stewardship and for sustaining ecological structure and function. Salinity data are collected by numerous Federal, State, and local agencies and universities as part of routine data collection programs. We used online databases... Tags: Estuaries, Salinity, USGS Science Data Catalog (SDC) USGS Measurements of Water Quality in San Francisco Bay (CA), 1969-2015 (ver. 4.0, March 2023) The U.S. Geological Survey maintains a program of water-quality studies in San Francisco Bay (CA) that began in 1969. This USGS data release archives and makes available all measurements from 1969-2015. Water-quality constituent measurements include salinity, temperature, light attenuation coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate matter, and dissolved inorganic nutrients (nitrate, nitrite, ammonium, phosphate and silicate). Since the mid-1990s, sampling was conducted at least monthly at 37 fixed sampling locations along a 145-km transect from lower South San Francisco Bay to the lower Sacramento River. A map and table of sampling locations are included in the Attached... Categories: Data; Types: Citation; Tags: San Francisco Bay, California, USGS Science Data Catalog (SDC), chlorophyll-a, dissolved oxygen, nutrients, All tags... salinity, temperature, turbidity, water quality, Fewer tags Data on Tree Growth and Plant Community Composition in Mid-Atlantic Tidal Freshwater Forested Wetlands Tree growth (annual tree ring measurements) and plant community composition data of tidal freshwater forested wetlands along longitudinal riverine positions (upper, lower, and stressed tidal river sites, and nearby upstream non-tidal forested floodplains) of the adjoining Pamunkey and Mattaponi Rivers, Virginia. Categories: Data; Tags: Botany, Chesapeake, Ecology, Forestry, Freshwater Tidal Forest/Woodland, All tags... Land Use Change, Mattaponi, Pamunkey, USGS Science Data Catalog (SDC), Virginia, Water Resources, biota, community ecology, dendrochronology, ecology, ecosystem monitoring, river discharge, salinity, sea-level change, stream discharge, tree cores, vascular plants, vegetation, Fewer tags RiverMET: Workflow and scripts for river metabolism estimation including Illinois River Basin application, 2005 - 2020 Ecosystem metabolism is a measure of energy flow in terrestrial and aquatic environments that quantifies a balance between the rate of biomass production by photosynthesizing plants and the rate of biomass oxidation by respiring plants and animals to maintain and build living biomass. It is therefore a fundamental measure of ecosystem function that quantifies the balance between the rate of production, maintenance, and decay of organic matter. It also provides an understanding of energy flow to higher trophic levels that supports food webs with secondary and tertiary productivity. Furthermore, metabolism helps explain when aquatic ecosystems undergo out-of-balance behaviors such as hypoxia. Recent advances in sensor... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Environmental Health, Hydrology, Illinois, Indiana, All tags... USGS Science Data Catalog (SDC), Water Quality, Water Resources, Wisconsin, aquatic biology, aquatic ecosystems, barometric pressure, biological productivity, dissolved oxygen, ecology, gage height, hydraulic geometry coefficients, organic decomposition, oxygen content (water), photosynthesis, river ecosystems, salinity, specific conductance, stream discharge, stream metabolism, water quality, water resources, water temperature, Fewer tags Groundwater and surface water data for a regional assessment of groundwater salinity variations and sources in the Indio Subbasin of the Coachella Valley, California The U.S. Geological Survey collected groundwater samples from 17 wells in the Indio subbasin (CA basin designation 7-21.01) of the Coachella Valley and surface water samples from two sites representing sources of recharge to the Indio subbasin in 2021. These samples are intended to provide inorganic water quality data, particularly total dissolved solids (TDS), within areas of the Indio subbasin not sampled for the Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater used for domestic and small system drinking water supplies in Coachella Valley (CODA). Other areas of special interest for the Indio salinity study were nearby managed aquifer... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Coachella Valley, Geochemistry, Groundwater, Groundwater age, All tags... Hydrology, Indio, Indio Subbasin, La Quinta, Palm Desert, Palm Springs, Riverside County, Salinity, Surface Water, TDS, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Water quality, geoscientificInformation, Fewer tags Spatial assessment of nutrients and water-quality constituents in Suisun Marsh with the salinity control gate reoperation experiment; a Delta Smelt Resiliency Strategy experiment 2018 This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in Suisun Marsh and Suisun Bay in the San Francisco Estuary of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, chlorophyll, blue-green algal pigments, and phytoplankton community structure. Data-collection cruises were conducted under three different environmental/flow conditions between July - September 2018 that coincided with conditions prior to, during, and following the Suisun Marsh Salinity Control Gates Summer Action. The action is part of the Delta Smelt Resiliency... Categories: Data; Tags: California, Central Valley, Geochemistry, Sacramento River, Sacramento-San Joaquin Delta, All tags... Salinity, San Francisco Estuary, Suisun Bay, Suisun Marsh, USGS Science Data Catalog (SDC), United States, Water Quality, biogeochemistry, biota, delta, drinking water use, environment, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, residence time, statistical analysis, visualization methods, water isotopes, water quality, water quality, Fewer tags Velocity test data for assessing the effect of salinity tolerance on cyanobacteria associated with a harmful algal bloom in Lake Okeechobee, Florida, July 10 to 13, 2017 This U.S. Geological Survey (USGS) Data Release provides velocity test data for assessing the effect of salinity tolerance on cyanobacteria associated with a harmful algal bloom in Lake Okeechobee, Florida, July 10 to 13, 2017. All data are reported as raw measured values and are not rounded to USGS significant figures. Water and algal bloom material were collected from Lake Okeechobee, Florida on July 7, 2017. This dataset includes continuous water-quality measurements take in the laboratory July 10 to July 13, 2017 measuring water temperature, specific conductance, salinity, pH, turbidity, dissolved oxygen, chlorophyll, and phycocyanin at five-minute intervals at velocities of 0.946, 0.271, and 0 feet per second... Categories: Data; Tags: Chlorophyll, Continuously Measured, Dissolved Oxygen, Florida, Harmful Algal Bloom, All tags... Lake Okeechobee, Monitor, Phycocyanin, Salinity, Specific Conductance, Turbidity, USGS Science Data Catalog (SDC), United States, Velocity, Water Temperature, pH, Fewer tags Imputed daily salinity and associated covariates to support statistical modeling for 91 salinity monitoring sites in the northern Gulf of Mexico Imputed salinities from either salinity or specific conductance observations and covariate data in data structures deemed suitable for statistical modeling of salinity in near-coastal environments of the northern Gulf of Mexico are provided for 15 salinity groups. The data herein were created by the 'covardr2formodel.R' script of 'covESTUSAL software' (Asquith and others, 2023), which represents terminal decisions on variable setup and transformations. The design ideal is data downloaded from this data release would be used in some path of “input” within statistical modeling software. Copious documentation of the decision process for data assembly is provided by Asquith and others (2023). Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Estuary, Gulf of Mexico, Gulf of Mexico, Modeling, Salinity, All tags... USGS Science Data Catalog (SDC), Fewer tags Imputedsalt_MissS The dataset entitled “imputedsalt_MissS” holds data structures to be relayed to statistical modeling of salinity in near-coastal environments of the Northern Gulf of Mexico. The content therein is created by the ‘covardr2formodel.R’ script that represents terminal decisions on variable setup and transformations. The design ideal is that the content of this directory would be copied to some path of “input” within a model building repository. The table in this directory would be especially suitable for both (1) formal data releases supporting as needed interpretive publications and (2) simultaneous long-term storage as copies within a model building repository in some specific terminal decisions (variable transforms... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Estuary, Gulf of Mexico, Gulf of Mexico, Mississippi Sound, Modeling, All tags... Salinity, Fewer tags Imputedsalt_GalBa The dataset entitled “imputedsalt_GalBa” holds data structures to be relayed to statistical modeling of salinity in near-coastal environments of the Northern Gulf of Mexico. The content therein is created by the ‘covardr2formodel.R’ script that represents terminal decisions on variable setup and transformations. The design ideal is that the content of this directory would be copied to some path of “input” within a model building repository. The table in this directory would be especially suitable for both (1) formal data releases supporting as needed interpretive publications and (2) simultaneous long-term storage as copies within a model building repository in some specific terminal decisions (variable transforms... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Estuary, Galveston Bay, Gulf of Mexico, Gulf of Mexico, Modeling, All tags... Salinity, Fewer tags Water Chemistry Data for Samples Collected at Groundwater Sites in the Placerita Oil Field Study Area, June 2018–November 2018, Los Angeles County, California The California State Water Resources Control Board (State Water Board) initiated the Oil and Gas Regional Monitoring Program (RMP) to assess effects of oil and gas development on groundwater designated for any beneficial use. The U.S. Geological Survey (USGS) is the technical lead in conducting the RMP through the California Oil, Gas, and Groundwater (COGG) Program, working in cooperation with the State Water Board, and in partnership with other State and local agencies. The USGS collected and analyzed groundwater for the Placerita Oil Field study area, the area within the Placerita Oil Field administrative boundary and the surrounding three-mile buffer zone in Los Angeles County, California. Sixteen groundwater... Categories: Data; Tags: California, Groundwater, Los Angeles County, Placerita Oil Field, Regional Monitoring Program, All tags... USGS Science Data Catalog (SDC), Water Quality, Water Resources, aquifers, geochemistry, groundwater, groundwater aquifer, groundwater quality, inlandWaters, salinity, salinity mapping, water chemistry, water quality data, Fewer tags 1 2 3 4 5 »