Results of Monitoring at Olkiluoto in 2006 - Environment (pdf) - Posiva

8Figure 2. Olkiluoto from the air on June 7, 2006 (Lentokuva Vallas Oy/Hannu Vallas).The vegetation and forest inventories by homogeneous polygons (VCP) in 2002 and2003 describe the vegetated landscape at those time points. The monitoring of forestsand mires on the island is based on a systematic grid with a density of 1 plot/ha, calledFET (see Appendix B for details). The first rounds of measurements on FET grid in2004 and its subset FEH plots in 2005 provide a statistical basis for the monitoring offorested parts of the landscape.As a first approach for estimating the extent of all current land-use types, the FET networkwas extended to cover all land-use/land-cover classes and intermediate plots wereadded between the existing plots to create a 50 x 50 m grid. The land-use/land-cover ofeach plot was visually interpreted from the aerial photographs taken in 2005 (Haapanenet al. 2007). The classification system was fine-tuned in the spring of 2007. Theinterpretation was updated using the new classes, and the 2006 aerial photographs wereinterpreted as well (Table 4, Figs. 3-4). The interpretation of older photographs is underway. This work allows the land-use changes to be monitored on a statistical basis.