A network of stream gauges record and telemeter river stage information. Flow measurements by field crews help calibrate and confirm calculations. Data from stream gauge telemetry requires careful consideration as field conditions and equipment malfunctions can provide erroneous readings. A more accurate assessment of actual flow rates requires a review of the flow record and processing to account for actual conditions. This Quality Assurance Quality Control flow data is available on the Data Download page.
Stream Gage Telemetry | Top
Telemetered stream gauge stations with stage/flow information available at the California Data Exchange Center.
Measurements | Top
- Flow and Stage Atlas
- Manual Measurements for Gauge Shift Corrections
SJRRP staff manually measure at gauge locations to verify and adjust rating curves. Posted results provide provisional estimates subject to revision during review and finalization. Below are USGS measurements and links to the USGS NWIS database containing all USGS measurements. Please see the Reclamation and DWR measurement spreadsheet on the data page.
Below Friant – See all measurements here
San Mateo Ave – See all measurements here
Below Mendota – See all measurements here
Posted results provide provisional estimates subject to revision during review and finalization.
Manual Measurements at Non-Gauged Locations
Other manual measurements of flow rates done periodically are available in the Annual Technical Report.