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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. - PowerPoint PPT Presentation
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Mathematical modeling and Hyperspectral imaging
Eli AteljevichDWR Delta Modeling Section
April 3, 2013
Image from USBR GIS Group
Martinez
Sacramento
Stockton
DSM2: Our 1D ModelSacramento River
San Joaquin River
Delta Island Consumptive Use
Tidal Surface Elevation & Water Quality
Inflow & water quality
Export flowTributaries
Exports
Yolo Bypass
SELFE 3D Circulation Model
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
Comparison by Yi Chao, JPL
Temperature• Fish• Nutrients• Hydrodynamics• Etc…
Turbidity/Sediment
• Utilized by Smelt/Salmon– Aquatic discussion
• Mercury in Yolo
Inundated Region
• Applications:– Flooding– Yolo habitat– Elevation maps
• Resolution:– Habitat: 10-20m– Elev maps < 5m
Source: MODIS
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
Delta Island Consumptive Use
• Major uncertainty– Flow and salt/quality
• Diversions and returns• Modeled using:– Land use/crops– Hydrology
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
Velocity• We are starting to use HF Radar in the Bay:– Model validation– Initialization/assimilation
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
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.