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Mathematical modeling and Hyperspectral imaging

Mathematical modeling and Hyperspectral imaging. Eli Ateljevich DWR Delta Modeling Section April 3, 2013. Yolo Bypass. Sacramento River. Sacramento. Tributaries. Delta Island Consumptive Use. Martinez. Tidal Surface Elevation & Water Quality. Stockton. Exports. San Joaquin River.

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Mathematical modeling and Hyperspectral imaging

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  1. Mathematical modeling and Hyperspectral imaging Eli Ateljevich DWR Delta Modeling Section April 3, 2013

  2. Yolo Bypass Sacramento River Sacramento Tributaries Delta Island Consumptive Use Martinez Tidal Surface Elevation & Water Quality Stockton Exports San Joaquin River Image from USBR GIS Group DSM2: Our 1D Model Inflow & water quality Export flow

  3. SELFE 3D Circulation Model

  4. Variables of Interest • Temperature (<50m) • Turbidity/Sediment • Bathymetry and inundated area (< 5m) • Island consumptive use: land use/hydrology • Particular constituents: • Chlorophyll/nutrients • Mercury (just askin’) • Altimetry (time res? accuracy?) • Velocity • Salinity Model hydrodynamics Important model application

  5. Temperature • Fish • Nutrients • Hydrodynamics • Etc… Comparison by Yi Chao, JPL

  6. Turbidity/Sediment • Utilized by Smelt/Salmon • Aquatic discussion • Mercury in Yolo

  7. Inundated Region • Applications: • Flooding • Yolo habitat • Elevation maps • Resolution: • Habitat: 10-20m • Elev maps < 5m Source: MODIS

  8. Bathymetry in the Intertidal Zone • High resolution data but… • Land water interface gaps up to 40m wide • Imaging may help • Vegetation maps may help • also help with roughness

  9. Delta Island Consumptive Use • Major uncertainty • Flow and salt/quality • Diversions and returns • Modeled using: • Land use/crops • Hydrology

  10. Altimetry • Applications: • Storm surge + sea level rise • Initialization • Validation • At issue: • Resolution • Accuracy (differential?) • How often? • Can learn bathymetry from inundated area • or IA from bathymetry and altimetry San Francisco

  11. Velocity • We are starting to use HF Radar in the Bay: • Model validation • Initialization/assimilation

  12. Salinity • Probably not a hyperspectral item • L-band? • Indirect measurement? • Lots of ground truth • Scale issues: • Bay: lots of water, medium PSU • Delta: small channels, < 1 PSU • But that is where the glory is, policy-wise

  13. Overarching conclusions • The problem is multi-scale • The difficult, narrow place is where the glory is (DWR) • The Bay/estuary is needed “on the way up” • Two goals 1) improve models and 2) enable new studies • Real-time info is valuable for operations but … • Planning is often hypothetical and the payoff to improving planning is big.

  14. Contact Info Eli Ateljevich eli@water.ca.gov

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