EnviroInsite training workshop - Advanced contouring methods
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Transcript of EnviroInsite training workshop - Advanced contouring methods
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Contouring – Advanced Issues
EnviroInsite Training Workshop
March 2013
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Interpolating measured values onto 1-D Grid
Kriging Range in 1-D Interpolation
EnviroInsite Training
measurement
~Range
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Kriging Range in 2D Interpolation
EnviroInsite Training
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Grid Tips
Advanced Issues in Contouring
• Use smallest number of rows / columns that provides reasonable result
• Start with small number of rows / columns and increase for final plot
• Change grid bounds (horizontal and vertical) to slice through contour
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Kriging Tips
Advanced Issues in Contouring
• Spherical model typically works best
• Increasing a_max / a_minsmooths result
• For contaminant plumes –set angle along axis and increase a_max relative to a_min
• Generally don’t change sill / nugget
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Other Contouring Options
Advanced Issues in Contouring
• Calculate volume within each contour shell (only for 3d)
• Log Transform – good for contaminant data
• Manual Label Placement
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Advanced Issues in Contouring
Hands-on Exercise