<abstract xmlns="http://www.w3.org/1999/xhtml"><p> The purpose of this paper is to evaluate the forest health condition in the area of Hydropower plant Gabčikovo using the digital multispectral aerial images from 2011 in the section Dobrohošt - Sap. We proposed a new innovative procedure of creating the forest mask in the image processing. It concerns a process of defining tree crowns, where we combined subject and raster oriented approach of the image classification. We evaluated forest health condition on a selected forest mask using the method of twophased sampling with regression. The indicators of health condition were tree defoliation and presence of heavily damaged trees and snags in the stands. Defoliation was used to compare the current forest health condition in the concerned area with the data from 2008. Presence of the snags as the result of severe damage is interpreted in terms of stand types related to site conditions. Field survey proved presence of invasive and non-native tree species and plants. Based on the result, we have formulated recommendations for further forest monitoring in the Danube River inundation.</p></abstract>

The purpose of this paper is to evaluate the forest health condition in the area of Hydropower plant Gabčikovo using the digital multispectral aerial images from 2011 in the section Dobrohošt - Sap. We proposed a new innovative procedure of creating the forest mask in the image processing. It concerns a process of defining tree crowns, where we combined subject and raster oriented approach of the image classification. We evaluated forest health condition on a selected forest mask using the method of twophased sampling with regression. The indicators of health condition were tree defoliation and presence of heavily damaged trees and snags in the stands. Defoliation was used to compare the current forest health condition in the concerned area with the data from 2008. Presence of the snags as the result of severe damage is interpreted in terms of stand types related to site conditions. Field survey proved presence of invasive and non-native tree species and plants. Based on the result, we have formulated recommendations for further forest monitoring in the Danube River inundation.

Evaluation of forest health condition in the
inundation area of Danube, section Dobrohošť – Sap from aerial multispectral images in 2011

Narodne lesnicke centrum - Lesnicky vyskumny ustav Zvolen, T. G. Masaryka 22, SK – 960 92 Zvolen

Česka zemědělska universita v Praze, Fakulta lesnicka a dřevařska, Kamycka 129, CZ – 165 21 Praha 6 – Suchdol

Narodne lesnicke centrum - Ustav lesnych zdrojov a informatiky Zvolen, Sokolska 2, 960 52 Zvolen

Narodne lesnicke centrum - Lesnicky vyskumny ustav Zvolen, Vyskumna stanica Juh, 925 42 Trstice

Central European Forestry Journal

The purpose of this paper is to evaluate the forest health condition in the area of Hydropower plant Gabčikovo using the digital multispectral aerial images...

Evaluation of forest health condition in the inundation area of Danube, section Dobrohošť – Sap from aerial multispectral images in 2011

Publié en ligne: 15 nov. 2013

Pages: 95 - 106

DOI: https://doi.org/10.2478/v10114-011-0021-z

Mots clés
floodplain forests, Hydropower plant Gabčikovo, health condition, aerial images, Danube River inundation

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