Thomas Gast & Associates Environmental Consultants Services

Fisheries Consulting.

Instream Flow Studies

• IFIM implementation
  
• Hydraulic habitat modeling, 1D and 2D
  
• Temperature modeling
  
• Habitat time series analysis
  
• Impact analysis
  

Fish Distribution and Abundance

• Direct observation (snorkel surveys)
  
• Active capture techniques (electrofishing, hook and line sampling)
  
• Passive capture techniques (seine and gill nets, fyke net, rotary screw trap, minnow traps)
  
• Quantitative population assessments (“Single Stream” and “Regional” estimates of fish abundance, Hankin and Reeves 1988; Dollof and Hankin 1993)
  
• Mark-recapture studies
  
• In-stream and riparian habitat assessments (habitat mapping, Large Woody Debris inventories)
  
• Active telemetry, acoustic and radio tags, passive telemetry, PIT tags
  

Benthic Invertebrate and Periphyton Sampling

Watershed Restoration Planning/Implementation

Stream Flow Measurements

• Acoustic Doppler Current Profiler (ADCP)
  
• Wading with hand-held meters
  
• Stream gauge installation
  

Water Quality Monitoring

• Temperature
  
• Dissolved Oxygen
  
• pH
  
• Conductivity, salinity, dissolved solids
  
• Turbidity, suspended solids
  
• Algae, phytoplankton, chlorophyll
  
• Nutrients
  
• Storm runoff/contaminant testing
  

Environmental Compliance Documentation

• NEPA/CEQA reports
  
• Environmental Assessments (EAs)
  
• Regulatory permitting
  

Endangered Species Act (ESA) consultations

• Federal (Sections 7 and 10)
  
• California (Fish and Wildlife Code Sections 2080.1 and 2081)
  

ADCP Mapping

• 3-diminsional Velocity mapping
  
• Bathymetry mapping
  

Boat Support

Scientific Report Writing, Editing, and Review

Eelgrass Surveys

• Sidescan sonar
  

Underwater Noise Monitoring

• Pile driving