PDF Estimation of Fire Emissions in Portugal

[Pages:23]Estimation of Land-use Changes in Portugal

Methodology used in NIR 2013

JRC Workshop, 27-29 February 2013

Land-use Changes in Portugal: General Approach ? 3 separate approaches for Portugal (9,22Mha)

? Portuguese Mainland (8,91Mha = 96,6%) ? Azores (0,23Mha = 2,5%) ? Madeira (0,08Mha = 0,9%)

Mainland

Madeira

Portuguese Mainland: General Approach

? Time-series 1995-2012 based on NFI6

? National Forest Inventory 6 covers all land uses and land-use changes (1995, 2005, 2010)

? Time-Series 1970-1995 (re)constructed using auxiliary data:

? National Forest Inventories: NFI2 (1974), NFI3(1985)

? Total forest area ? Forest area per forest type

? General Census of Agriculture (1979, 1989, 1999, 2009)

? Total cropland and grassland area ? Crop area per crop type

NFI6 Methodology

? Land-use/cover data

? Use of Sample Points

? Systematic grid of 500m x 500m (360'000 points) ? Land-use X attributed to a point if included in an area of X >0,5ha

? Interpretation of airborn imagery

? Full wall-to-wall country coverage ? False color near infrared imagery (1995, 2005, 2010) and true color imagery

(2005, 2010) ? Spatial resolution 1m (1995) and 0.5m (2005, 2010)

? Use of Kyoto and UNFCCC compatible land-use classification

? ALL land uses (not just forest)

? Land-use Change data

? Comparison of land-use in each point in each temporal assessment

? Two land-use change matrices : 1995-2005 and 2005-2010 ? Annual data for land-use change estimated by dividing total land-use change by

number of years in interval

Data production process

National Sampling Grid

Orthophotomaps 1995 Orthophotomaps 2005 Orthophotomaps 2010

Classified sampling points 1995 Classified sampling points 2005 Classified sampling points 2010

Auxiliary data

Final classification

NFI6 ? Attribution of Land-use/cover

? A > 0.5ha

? Results calculated based on No. of plots per land use type

75ha B 25ha A

? A < 0.5ha or ................
................

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