Delta Flows: Data and Calibrations Cathy Ruhl US Geological Survey California Water Science Center, Sacramento, CA.

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Presentation transcript:

Delta Flows: Data and Calibrations Cathy Ruhl US Geological Survey California Water Science Center, Sacramento, CA

Many Thanks! Many Thanks! Funding Provided By: IEP CALFED DWR Contra Costa Water District City of Stockton Sacramento Regional Water Treatment Plant

DSM2 Recalibration Metrics for identifying optimal periods Metrics for identifying optimal periods Hydrology Hydrology Wide Hydrologic Variability Wide Hydrologic Variability Range of Export Rates Range of Export Rates Variability in Delta-Cross Channel Gate Operations Variability in Delta-Cross Channel Gate Operations Variability in South Delta Temporary Barrier Operations Variability in South Delta Temporary Barrier Operations Density of Data Density of Data Continuity of Data Continuity of Data Days to weeks Days to weeks Confidence in Data Confidence in Data

Evolution of the Network 1987: Old River and Middle River 1992: Walnut Grove 1996: Delta Outflow 1999: South Delta 2001: North Delta 2005: South Delta 2006: Central Delta

Short Term Data Sets Early South Delta / Dye Studies Early South Delta / Dye Studies Spring / Summer1997, 1998, 1999 Spring / Summer1997, 1998, 1999 Confluence Study Confluence Study Fall1998 Fall1998 Grizzly Bay Grizzly Bay Summer to Summer Summer to Summer Delta Cross Channel Studies Delta Cross Channel Studies Fall2000, 2001, 2002, 2005 Fall2000, 2001, 2002, 2005 Mildred Island Mildred Island Summer / Fall2001 Summer / Fall2001 Franks Tract Franks Tract Spring / Summer 2002 Spring / Summer 2002

Hydroacoustic Instrumentation Ultrasonic Velocity Meters (UVM) Ultrasonic Velocity Meters (UVM) Acoustic Doppler Velocity Meters (ADVM) Acoustic Doppler Velocity Meters (ADVM) Horizontal Profiling Capability Horizontal Profiling Capability Sideward-looking (long-term deployment) Sideward-looking (long-term deployment) Upward-looking (short-term deployment) Upward-looking (short-term deployment)

Hydroacoustic Instrumentation Ultrasonic Velocity Meters (UVM) Ultrasonic Velocity Meters (UVM) Innovative application Innovative application Constrained deployment configurations Constrained deployment configurations

Hydroacoustic Instrumentation Acoustic Doppler Velocity Meter Flexible Deployment Configuration

Hydroacoustic Instrumentation In-Situ Deployments In-Situ Deployments Flexible locations Flexible locations Short-term only Short-term only

Data Availability

Real-Time Data Real-Time Data USGS – NWIS Web USGS – NWIS Web Unit Values – last 31 days only Unit Values – last 31 days only Daily Values – updated daily Daily Values – updated dailyhttp://waterdata.usgs.gov/ca/nwis CDEC CDEChttp://cdec.water.ca.gov Special Studies Records Special Studies Records USGS – Jon Burau or Cathy Ruhl USGS – Jon Burau or Cathy Ruhl Historical Long-Term Monitoring Record USGS – NWIS Web Daily Values – updated daily USGS – Information Officer (Tom Haltom) (916) , USGS – Unit Values Warehouse National effort – expected in December 2007 BDAT

Many Thanks! Many Thanks! Funding Provided By: IEP CALFED DWR Contra Costa Water District City of Stockton Sacramento Regional Water Treatment Plant

Evolution of the Network 1987: Old River and Middle River 1992: Walnut Grove 1996: Delta Outflow 1999: South Delta 2001: North Delta 2005: South Delta 2006: Central Delta

DSM2 Recalibration Metrics for identifying optimal periods Metrics for identifying optimal periods Hydrology Hydrology Wide Hydrologic Variability Wide Hydrologic Variability Range of Export Rates Range of Export Rates Variability in Delta-Cross Channel Gate Operations Variability in Delta-Cross Channel Gate Operations Variability in South Delta Temporary Barrier Operations Variability in South Delta Temporary Barrier Operations Density of Data Density of Data Continuity of Data Continuity of Data Days to weeks Days to weeks Confidence in Data Confidence in Data

Tidal Filters Removes tidal variations Removes tidal variations Used for daily flow computation Used for daily flow computation Godin filter is automatically applied in NWIS Godin filter is automatically applied in NWIS Loss of 35 hours at beginning and end of series Loss of 35 hours at beginning and end of series Periods of missing data are broadened when filter is applied Periods of missing data are broadened when filter is applied

Godin Filter