Assessment of water-quality in the California Sacramento-San Joaquin Delta during a North Delta directed flow action: August - October 2018 (ver. 2.0, September 2021)

This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll . Data-collection cruises were conducted under three different environmental/flow conditions in August, September, and October 2018 that coincided with conditions prior to, during, and following a directed flow action or pulse of agricultural return water organized by the California Department of Water Resources and California Natural Resources Agency .

Data and Resources

Field Value
accessLevel public
bureauCode {010:12}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier USGS:5e7ceb88e4b01d5092751c18
metadata_type geospatial
modified 20210915
old-spatial -121.7917, 38.0762, -121.5884, 38.3524
publisher U.S. Geological Survey
publisher_hierarchy Department of the Interior > U.S. Geological Survey
resource-type Dataset
source_datajson_identifier true
source_hash 88fe4bb3d7a77fb88a27290b968fc49f5c8dd289
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-121.7917, 38.0762], [-121.7917, 38.3524], [ -121.5884, 38.3524], [ -121.5884, 38.0762], [-121.7917, 38.0762]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • biogeochemistry
  • biota
  • california
  • central-valley
  • ckan
  • delta
  • directed-flow-action
  • drinking-water-use
  • environment
  • geo
  • geoss
  • high-frequency
  • high-resolution
  • hydrogeology
  • inlandwaters
  • liberty-island
  • national
  • north-america
  • nutrient-content-water
  • nutrients
  • phytoplankton
  • public-supply-water-use
  • real-time
  • sacramento-river
  • sacramento-san-joaquin-delta
  • statistical-analysis
  • united-states
  • usgs-5e7ceb88e4b01d5092751c18
  • visualization-methods
  • water-quality
isopen False
license_id notspecified
license_title License not specified
maintainer Elizabeth B. Stumpner
maintainer_email estumpner@usgs.gov
metadata_created 2025-11-20T14:38:46.416425
metadata_modified 2025-11-20T14:38:46.416430
notes This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll . Data-collection cruises were conducted under three different environmental/flow conditions in August, September, and October 2018 that coincided with conditions prior to, during, and following a directed flow action or pulse of agricultural return water organized by the California Department of Water Resources and California Natural Resources Agency .
num_resources 2
num_tags 32
title Assessment of water-quality in the California Sacramento-San Joaquin Delta during a North Delta directed flow action: August - October 2018 (ver. 2.0, September 2021)