DSM2 Calibration Panel CE 12-14-06 DataModels Elevation.
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Transcript of DSM2 Calibration Panel CE 12-14-06 DataModels Elevation.
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!