{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Katy O'Donnell", "hasEmail": "mailto:kodonnell@usgs.gov"}, "description": "Broad-area, high-resolution, boat-based water quality mapping surveys of the Sacramento-San Joaquin Delta and Suisun Bay (Delta) of California, USA were conducted under different environmental/flow conditions in May, July, and October of 2022. The spatial and temporal variability of nutrients, phytoplankton, and related water quality parameters were assessed. This dataset includes measurements of nitrate, ammonium, orthophosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9QULEAT", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.64fa6804d34ed30c205504a6.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_64fa6804d34ed30c205504a6", "keyword": ["California", "Liberty Island", "Lower Sacramento", "San Joaquin Delta", "Suisun Bay", "USGS:64fa6804d34ed30c205504a6", "United States", "biogeochemistry", "biota", "delta", "drinking water use", "environment", "high-resolution", "hydrogeology", "inlandWaters", "nutrient content (water)", "nutrients", "phytoplankton", "public supply water use", "real-time", "statistical analysis", "visualization methods", "water quality"], "modified": "2025-07-10T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-122.1325, 37.8290, -121.3320, 38.5705", "theme": ["geospatial"], "title": "Assessing spatial variability of nutrients, phytoplankton, and related water quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2022 High resolution mapping surveys"}