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Preliminary Results for Individual Sites NEG/ECP Forest Mapping Group: 

Preliminary Results for Individual Sites NEG/ECP Forest Mapping Group Brief background on approaches Preliminary Maps Compared with ecological unit analysis Incorporating FIA/FHM plots CL nutrient N Forest Health Parameters

Approaches for Calculating Critical Loads: 

Approaches for Calculating Critical Loads Site specific approach Data from individual sites Soil pits Forest inventories Air quality stations Ecological unit approach GIS layers/regional models

An Important Difference…: 

An Important Difference… The site-specific approach Heterogeneous forest ecosystem Multiple data sources Multiple ways to calculate critical load

An Important Difference…: 

An Important Difference… Multiple data sources

An Important Difference…: 

An Important Difference… Multiple data sources

Vermont Sites: 

Vermont Sites

Vermont Sites: 

Vermont Sites

Incorporating FIA and FHM Sites: 

Incorporating FIA and FHM Sites Advantages Much better coverage Forest health parameters Disadvantages Primarily vegetation data Limited in the approach we are able to use

Vermont Sites with FIA and FHM Plots: 

Vermont Sites with FIA and FHM Plots Intensive Research Sites Additional Research Sites NRCS Soil Survey Sites Private Timberlands Vegetation Survey Sites FIA and FHM Plots

New England FIA and FHM Plots: 

New England FIA and FHM Plots Forested FIA plots used in the FMG critical load calculations. Inclusion is based on availability of digitized soil surveys. State VT NH MA CT RI ME #sites 533 415 151 320 144 718 Total# 840 938 646 361 144 3,620 Counties shaded red do not have digitized county soil maps available and will not be included in this analysis.

Where we’re going from here (next steps): 

Where we’re going from here (next steps) Complete calculations for the rest of New England (and NY) Adjustments to the Ecological Unit analysis Further comparisons between the approaches Forest Health Surface water