Zhodnotenie zdravotného stavu lu nych lesov v inunda nej oblasti Dunaja v úseku Dobroho - Sap z leteckych snímok

We assess in the paper the health condition of floodplain forests being affected by the operation of Gab íkovo hydropower plant in the inundation area of the Danube River in the section Dobroho t - Sap using multispectral aerial photos obtained in 2008. We summarize results from aerial photographing in the years 1996, 1999, 2002 and 2005. We use defoliation and occurrence of heavily damaged trees as well as snags in stands as indicators of the health condition of stands. Based on the assessment of both indicators we may state that by the construction of dam with artificial channel system there are secured suitable conditions, first of all, for floodplain forest communities of transitional type and hard floodplain forests, which dominate in the interest area what concerns the area they cover on this territory. We may assess their health condition as very good in a long term. We monitor increased occurrence of snags in 64 stands with total area 334 hectares. Soft floodplain forests of higher age are the most affected communities.