US Migrating
type: Agent

i12 Delta Hydrology
type: Dataset
contact point: Organization
  fn: DWR GIS
keyword: cdec
keyword: hydrology
keyword: california-department-of-water-resources
keyword: navd88
keyword: dwr-gis-atlas
keyword: california
keyword: 100-year-stage
keyword: GEO
keyword: suisun-marsh
keyword: North America
keyword: san-joaquin-river
keyword: bay-delta
keyword: hydstra
keyword: gage-stations
keyword: reference
keyword: peak-stages
keyword: AmeriGEO
keyword: dwr
keyword: inland-waters
keyword: central-valley
keyword: river-stage
keyword: delta
keyword: GEOSS
keyword: United States
keyword: water-levels
keyword: National
keyword: CKAN
keyword: san-francisco-bay
keyword: tide-levels
keyword: sacramento-san-joaquin-delta
keyword: sacramento-river
keyword: AmeriGEOSS
theme: {"Natural Resources"
theme: Water}
description: This point dataset represents the location of gaging stations in the Sacramento-San Joaquin Delta and Suisun Marsh that have historic and statistical hydrologic data, specifically various river stage data. Stages are given in NAVD88, units feet. Specific stages are given for peak stages, 100-year stages produced under 2 separate US Army Corps of Engineers hydrology reports from 1976 and 1992, the year of previous peak stages cited by the 1976 and 1992 reports, and approximate typical tidal values as approximately estimated based on long term data records. This 2023 version of this datset replaces the prior 2020 version, and should be used as a complete replacement. The underlying analyses did not change, but the USACE peak observed stage field names from the prior version were corrected and supplemental USACE 50- and 100-year stages were added accordingly. In addition, the vertical datum conversion used at specific gages was added. The vertical datum conversion is based on DWR survey and North Central Regional Office information that is maintained for each gage station. The stage data was compiled by Karen Tolentino, engineer with Delta Levees, and by Joel Dudas, Senior Engineer in DWR's Division of Engineering, based on a wide variety of sources, including the HYDSTRA database, various historic bulletins, raw data, station histories, and other information provided by DWR's North Central Region Office, USGS, and other misc sources. They also adjusted all data to approximate NAVD88-related stages. Observed data periods of record varied widely by station, but go back as far as 1905. All peak values were derived from start of records until up to May, 2017. The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR Spatial Data Standards, specifically the DWR Spatial Data Standard version 3.5, dated April 12, 2023. DWR makes no warranties or guarantees —either expressed or implied — as to the completeness, accuracy, or…
issued: 2023-06-19T19:36:36+00:00
modified: 2023-06-19T00:00:00+00:00

CSV
type: Distribution
access URL: https://gis.data.cnra.ca.gov/api/download/v1/items/4d1ddb65e64f456b85536f42368d1c28/csv
media type: text/csv
format: CSV
issued: 2025-07-23T23:51:11.736413
modified: 2025-09-24T05:41:22.539087

ArcGIS GeoService
type: Distribution
access URL: https://utility.arcgis.com/usrsvcs/servers/4d1ddb65e64f456b85536f42368d1c28/rest/services/InlandWaters/i12_Delta_Hydrology/MapServer/0
media type: application/octet-stream
format: ArcGIS GeoServices REST API
issued: 2025-07-23T23:51:11.736411
modified: 2025-09-24T05:41:22.537873

ArcGIS Hub Dataset
type: Distribution
access URL: https://gis.data.cnra.ca.gov/datasets/4d1ddb65e64f456b85536f42368d1c28_0
format: HTML
issued: 2025-07-23T23:51:11.736408
modified: 2025-09-24T05:41:22.536639

KML
type: Distribution
access URL: https://gis.data.cnra.ca.gov/api/download/v1/items/4d1ddb65e64f456b85536f42368d1c28/kml
media type: application/vnd.google-earth.kml+xml
format: KML
issued: 2025-07-23T23:51:11.736417
modified: 2025-09-24T05:41:22.542435

Shapefile
type: Distribution
access URL: https://gis.data.cnra.ca.gov/api/download/v1/items/4d1ddb65e64f456b85536f42368d1c28/shapefile
media type: application/zip
format: ZIP
issued: 2025-07-23T23:51:11.736414
modified: 2025-09-24T05:41:22.540251

GeoJSON
type: Distribution
access URL: https://gis.data.cnra.ca.gov/api/download/v1/items/4d1ddb65e64f456b85536f42368d1c28/geojson
media type: application/geo+json
format: GeoJSON
issued: 2025-07-23T23:51:11.736415
modified: 2025-09-24T05:41:22.541338