Imagery for Forest R

1
Imagery for Forest RD

• General requirements
• Sub-crown spatial resolution
• Fine spectral resolution (10nm FWHM)
• Season
• Image collection coincident with field data
  collection
• Accurate ground control and radiometric
  corrections

2
Potential NAFE Projects

• Three objectives
• Forest water use
• Productivity prediction catchment-scale soil
  water holding capacity
• The condition of crowns that are severely
  affected by agents that reduce crown visibility
  in images

3
Forestry Water Use

• Forest water use an important issue
• Post fire
• Pasture to plantations
• Effects on streamflow/groundwater
• Canopy transpiration rate
• High resolution thermal imagery - midday
• Field site near Mt.Gambier (SA)
• Blue gum (E.globulus)
• Calibrate models to sap flow sensor data
• Calibration of imagery?

4
Forestry Productivity Prediction

• Plantation productivity prediction at catchment
  scale
• Current work focuses on recharge and discharge
  areas, break of slope
• Maximum benefit requires understanding of
  catchment-specific hydrological processes
• Images to calibrate/validate catchment-scale soil
  water holding capacity prediction models
• Point samples and temporal prediction
• Imagery requirements moderate resolution radar?
• Subcatchments of the S.W. Goulburn-Broken

5
Forestry Invisible Crowns

• Several damaging agents increase crown
  transparency
• Essigella californica aphid defoliates crowns
• Reduces crown visibility
• Increased light penetration causes higher vigour
  of understorey vegetation
• Pixels over the most affected trees have high NIR
• High resolution lidar and hyperspectral imagery
• Field study area in Carabost, southern NSW
  (P.radiata).