Cost Action E 43 WG 1 COST Action

Cost Action E 43 - WG 1 COST Action E 43 Harmonised definitions and measuring practices State of the art Team of specialists Geneva, 25 – 27 April 2005 Claude COST Action E 43 - WG 1 Vidal April, 2005 cvidal@ifn. fr

State of the art of WG 1 work COST Action E 43 1. Elaboration of a questionnaire 2. 23 country answers till now 3. Compilation and analysis of the results 4. Follow up COST Action E 43 - WG 1 April, 2005 2

State of the art of WG 1 work COST Action E 43 Elaboration of the questionnaire • Draft of the questionnaire • Recommendations and changes coming from the Florence seminar (December 2004) • Integrating and remodelling the questionnaire • Sending it in 2 parts (September - October 2004) (middle and end of January 2005) COST Action E 43 - WG 1 April, 2005 3

State of the art of WG 1 work COST Action E 43 27 questionnaires sent 23 country answers till now (LU, not in the action did answer) Data available (23) Data not available yet (5) COST Action E 43 - WG 1 April, 2005 4

State of the art of WG 1 work COST Action E 43 First analysis of the results • Forest definition part a • Volume estimation parts b and c • Inventory methods parts d and e COST Action E 43 - WG 1 April, 2005 5

State of the art of WG 1 work COST Action E 43 Forest definition Main parameters used to define a forest Number of Countries adopting the parameter Percentage of total forest area Percentage of total growing stock volume Crown coverage 17 98% 96% Minimum extension 19 100% Minimum width 14 94% 91% Minimum tree height 13 84% 65% COST Action E 43 - WG 1 April, 2005 6

State of the art of WG 1 work COST Action E 43 Forest definition Coverage classes used % of forest area assessed 80% 3 nb of countries forest area 60% 40% 20% 1 8 4 3 1 2 0% 5% COST Action E 43 - WG 1 10% 15% 20% 25% 30% 35% 40% 45% 50% coverage classes April, 2005 n/a 7

State of the art of WG 1 work COST Action E 43 Forest definition Minimal area size used % of forest area assessed 100% forest area 8 nb of countries 80% 60% 40% 20% 8 5 4 1 1 0% 0. 05 0. 1 0. 3 0. 5 2. 5 minimal area size (ha) COST Action E 43 - WG 1 April, 2005 8

State of the art of WG 1 work COST Action E 43 Volume estimation Tree compartments above ground: • stump above ground • stem • tree top • bark • branches COST Action E 43 - WG 1 April, 2005 9

State of the art of WG 1 work COST Action E 43 - WG 1 April, 2005 10

State of the art of WG 1 work COST Action E 43 Volume estimation Minimal diameters of trees included in volume estimation % of growing stock assessed 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 0% Growing stock volume 6 nb of countries 4 < 2. 0 cm 3 2. 0 - 3. 9 cm 3 4. 0 - 5. 9 cm 6 6. 0 - 7. 9 cm 0 8. 0 - 9. 9 cm 2 >= 10 cm 1 n. a. diameter class COST Action E 43 - WG 1 April, 2005 11

State of the art of WG 1 work COST Action E 43 Inventory methods Development of statistical inventories 1970 1975 1980 1985 1990 1995 2000 2005 AT BE CH CZ DE DK EE EL ES FI FR IE IT LT LU LV NO RO SE SI SK COST Action E 43 - WG 1 April, 2005 12

State of the art of WG 1 work COST Action E 43 Inventory methods High precision Area precision: mostly < 3% Map evaluation: 3 countries 1% 13% 68% % of forest 6% 1% 8 1 10% 3 % of countries 3 0% 10% 20% 30% 40% 1 50% 60% 3 70% 80% 90% 100% Precision of area estimations < 1% COST Action E 43 - WG 1 1% - 2% 2% - 3% April, 2005 > 3% Map NA 13

State of the art of WG 1 work COST Action E 43 Follow up • Improvement of the questionnaire • Additional information from countries • Further step of analysis COST Action E 43 - WG 1 April, 2005 14

Cost Action E 43 - WG 1 COST Action E 43 Thank you for your attention Claude Vidal COST Action E 43 - WG 1 cvidal@ifn. fr April, 2005 15