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 Data Release archives and makes available all measurements made from 1969 through 2015. Water-quality constituents include salinity, temperature, light extinction coefficient, chlorophyll-a, dissolved oxygen, suspended particulate matter, nitrate, nitrite, ammonium, silicate and phosphate. Time, Julian date, and three constituents were added retroactively in 2023 to all years: ratio of chlorophyll-a and pheopigments, oxygen percent saturation, and density as Sigma-t. Water samples were collected along a 145-km transect from lower South San Francisco Bay to the lower Sacramento River. Samples were collected at 59 fixed sampling locations, of these 37 became standard long-term sampling stations. All stations are listed in the station location table (SFBstationlocations_19692015.csv) and standard stations are shown on the map (sfbaymap.jpg)
Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[
"010:12"
]
|
| contactPoint |
{
"fn": "Tara Schraga",
"@type": "vcard:Contact",
"hasEmail": "mailto:tschraga@usgs.gov"
}
|
| description | The U.S. Geological Survey maintains a program of water-quality studies in San Francisco Bay (CA) that began in 1969. This Data Release archives and makes available all measurements made from 1969 through 2015. Water-quality constituents include salinity, temperature, light extinction coefficient, chlorophyll-a, dissolved oxygen, suspended particulate matter, nitrate, nitrite, ammonium, silicate and phosphate. Time, Julian date, and three constituents were added retroactively in 2023 to all years: ratio of chlorophyll-a and pheopigments, oxygen percent saturation, and density as Sigma-t. Water samples were collected along a 145-km transect from lower South San Francisco Bay to the lower Sacramento River. Samples were collected at 59 fixed sampling locations, of these 37 became standard long-term sampling stations. All stations are listed in the station location table (SFBstationlocations_19692015.csv) and standard stations are shown on the map (sfbaymap.jpg) |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
"format": "XML",
"accessURL": "https://doi.org/10.5066/F7TQ5ZPR",
"mediaType": "application/http",
"description": "Landing page for access to the data"
},
{
"@type": "dcat:Distribution",
"title": "Original Metadata",
"format": "XML",
"mediaType": "text/xml",
"description": "The metadata original format",
"downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.64248ee5d34e370832fe343d.xml"
}
]
|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_64248ee5d34e370832fe343d |
| keyword |
[
"USGS:64248ee5d34e370832fe343d",
"chlorophyll",
"nutrient content (water)",
"oxygen content (water)",
"salinity",
"turbidity",
"water quality",
"water temperature"
]
|
| modified | 2023-04-06T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -122.4717, 37.4717, -121.6667, 38.2267 |
| theme |
[
"Geospatial"
]
|
| title | USGS Measurements of Water Quality in San Francisco Bay (CA), 1969-2015 (ver. 4.0 March 2023) |
