DSM2 Calibration Panel CE 12-14-06

Data ModelsElevation

DSM2 Calibration Panel CE 12-14-06

Data Models

DataPaul asked:

“…how stakeholders may play a role in assisting the Delta Modeling Section in the calibration/validation effort.”

DSM2 Calibration Panel CE 12-14-06

Data Models

DataPaul asked:

“…how stakeholders may play a role in assisting the Delta Modeling Section in the calibration/validation effort.”

Insist that agency data be accurate, timely, documented, and easily available

DSM2 Calibration Panel CE 12-14-06

Data Models

Data

Including elevation data

DSM2 Calibration Panel CE 12-14-06

Data Models

Data used by models

• Flow data- USGS

• Stage data- DWR, USGS

• Bathymetry data- USCOE, DWR, NOAA

• Topography data- ad hoc

DSM2 Calibration Panel CE 12-14-06

Data Models

Data used by models

• Flow data- USGS

• Stage data- DWR, USGS

• Bathymetry data- USCOE, DWR, NOAA

• Topography data- ad hoc

Elevation related data

DSM2 Calibration Panel CE 12-14-06

Data Models

Data used by models

• Flow data- USGS

• Stage data- DWR, USGS

• Bathymetry data- USCOE, DWR, NOAA

• Topography data- ad hoc

Elevation related data

BUT, elevation control istotally ad hoc!

DSM2 Calibration Panel CE 12-14-06

GPS Bench Mark and Tide Gage Locations in theDelta and Suisun Marsh

All elevation data (stage, bathymetry, topography)

depends on this

geodetic benchmark network

• realigned in 2002 to NAVD88 standard

• probably needs to be done again soon!

DSM2 Calibration Panel CE 12-14-06

Data Models

Everyone needs to know the elevation

• models: geometry, geometry, geometry

• levee system as good as lowest point

• tidal marsh restoration within tidal frame

• flood management

• navigation

DSM2 Calibration Panel CE 12-14-06

Data Models

Everyone especially needs to know the rates of elevation change

• rate of land/levee subsidence

• rate of tidal marsh elevation restoration

• rate of channel sedimentation/erosion

• rate benchmark movement

• rate of stage gauge movement

• rate of sea level rise

DSM2 Calibration Panel CE 12-14-06

Data Models

As yet, no one is in charge

• Given its importance, we should know the elevation anywhere in the estuary.

• Elevation data requires ongoing end-to-end coordination and follow through.

• There oughta be a Program.

DSM2 Calibration Panel CE 12-14-06

Data Models

End-to-End Elevation Monitoring Program

1. Geodetic benchmark survey- monitor change

2. Align stage gauges- monitor change

3. High precision bathymetry surveys- monitor change

4. High precision topography surveys (e.g. LiDAR)- monitor change

5. Spatial data management with integrated elevation products (e.g. grids)

6. Meta data documentation

DSM2 Calibration Panel CE 12-14-06

<-3

-2.9 - -2.5

-2.4 - -2

-1.9 - -1.5

-1.4 - -1

-0.9 - -0.5

-0.49 - 0

0.01 - 0.5

0.51 - 1.1

1.2 - 6

>6.0

Inter-tidal Elevation Zone(~MLLW to MHHW)

ElevationElevationNAVD88NAVD88

Below MLLW (~1.1 ft NAVD88)

Suisun Marsh Land Elevation

Based on Fall 2005DRAFT LiDAR Survey

Upland (>6 ft NAVD88)

Channels and Bays are USGS 1:24,000 Hydrography

For Example:For Example:

DSM2 Calibration Panel CE 12-14-06

Hey Stakeholders

• Insist that agency data be accurate, timely, documented, and easily available…..

Including elevation data!