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Aquatic Hyperspectral Data

Aquatic Hyperspectral Data. Needs and desires . Resolution. Need fine scale resolution to get data from small delta channels Channels range in size, with many less than 20m. Certain imagery would require meter/sub-meter resolution to be useful ( eg . SAV, FAV). Turbidity.

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Aquatic Hyperspectral Data

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  1. Aquatic Hyperspectral Data Needs and desires

  2. Resolution • Need fine scale resolution to get data from small delta channels • Channels range in size, with many less than 20m. • Certain imagery would require meter/sub-meter resolution to be useful (eg. SAV, FAV).

  3. Turbidity • May have impacts on Smelt/Salmonid Survival • Increases Delta Smelt foraging success • Delta Smelt utilize turbid areas more frequently Probability of catching Delta Smelt in FMWT

  4. Salinity (EC) • Cue utilized for salmonidsmolt migration • X2 zone is highly utilized by Delta Smelt and may prove to be important for smelt recovery. Probability of catching Delta Smelt in FMWT

  5. Submerged Aquatic Vegetation • May contribute to non-native predatory fish species composition and success • May be utilized by migrating salmonidsmolts for cover/forage.

  6. Floating Aquatic Vegetation • Blocks sun from penetrating water column, potentially influencing primary productivity • Hyacinth has been shown to reduce O2 levels in the water. • Water loss through transpiration. • Provides ambush sites for non-native predatory fish

  7. Temperature • Higher temperatures (>16.5 °C) lead to • Higher risk for disease • Lower rates of feeding/increased metabolic demand • Reduced food availability • Increased exposure to warm-water tolerant predatory fish • Temperature induced mortality (>20-22 °C) • Large variation in temperature favors native fish assemblages

  8. Water elevation • Could prove useful for determining inundation of available floodplains.

  9. Riparian Vegetation • Contributes to lower water temperatures • Increases invertebrate food production

  10. Survey Timing • Key Migration Periods • Winter for Delta Smelt, Winter-Run Chinook Salmon, and Steelhead Spawning Migration • Spring for Smolt Outmigration, Striped Bass and Spring-Run Chinook Spawning Migration • Summer for Green Sturgeon Spawning Migration • Fall for Fall-Run and Late Fall-Run Chinook Salmon Spawning Migration

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