Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [WP-3 FOREST INVENTORY APPLICATIONS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: FOREST DAMAGE INVENTORY USING LANDSAT IMAGERY BY MEANS OF COMPUTER-AIDED CLASSIFICATION. A. Kadro

Document type:: Multivolume work

Structure type:: Chapter

FOREST DAMAGE INVENTORY USING LANDSAT IMAGERY BY MEANS OF COMPUTER-AIDED CLASSIFICATION A. Kadro Unversitat Freiburg D-78 Freiburg FED. REP: of GERMANY ISPRS, COM. VII Abstract: The forest decline at present is a major environmental problem occur ring in central and western Europe, due to the air pollution and acid lain. Due to the rapid increase in forest area damaged, remote sensing techniques have become an important and essential tool for large area forest decline inventory. This paper presents the potential application and the advantage of Landsat imagery for forest damage assessment and the mapping and moni toring the progressive development of damage occurring at sites in the Black Forest (South West Germany) and in the Erzgebirge (Mountain) region, located between East Germany and Czechoslovakia. For this task, satellite imagery (Landsat Thematic Mapper and multispectral Scanner) has been used for forest damaged assessment. The evaluation of both types of data, using computer-aided, supervised classification, makes it possible to identify and quantify a ranged forest damaged classes. Another methodology for the evaluation of the Landsat data is the ratioing between important spectral bands determind to be useful in discrimination of damage. Keywords: Landsat imagery. Forest Damage Assessment and Monitoring 1- Introduction: During the last decade, a new type of fo rest damage situation has, refered to as forest decline, occured in many forest regions of West Germany and western Europe, independent of site conditions and independent of the distance to the industrial areas. This forest decline be gan very early in the Erzgebirge (moun tain region) located between Czechoslova kia (CSFR) and East Germany (GDR) . The first Conference dealing with forest decline in this area was held in 1956 and reported details regarding the first fo rest damage inventory, the damaged area at that time was only 10,000 ha. (Excursion prospect 1989 to Erzgebirge region). Such kind of forest decline, characterized by special damage symptoms, was considered to be caused mainly by air pollution and acid rain (NiefSlein et al 1985). The forest soil now has a lower pH value than previous measurements and soil investigations (Butzke 1981). The degree of the forest damages differ between the study test site in the Black Forest (south west Germany) and the study test site Erzgebirge, they are now not comparable, due to the fact that the situation in the forest area in Erzge birge is so severe. This area belongs to one of the most heavily damaged forest areas in Europe and the world, due to air pollution. The forest damage symptoms are needle loss during the active growth stage, often accompanied by discoloration (chlo rosis). In some cases there is chlorosis in the whole crown, part of the upper side of the branches only, or in combina tion with needle loss. Later these trees become dead. This kind of damage leads, especially in case of old firs, to a ty pical deformation of the crown, due to dying parts of the crown (storks nest). In the case of young trees, damage begins with yellowing and defoliation and results is death in a short time (AFZ 1984, Hildebrandt and Kadro 1984). In Germany and western Europe, the forest stand structure is mostly, homogeneous in term of age and species composition. Therefore the damage symptoms in one stand are similar. To study the situation of the forest con cerning the health and vitality, the com mission of the European Community's Forest and Silviculture Division de termined a forest damage classification based on the percentage of needle/leaf loss. The damage classes are Tab. (1): Class Needle/ Loss(%) Leaf Tree health 0 0 to 10 healthy 1 11 to 25 slight damage 2 26 to 60 medium to serious damage 3 61 to 99 dying 4 100 dead "The presence of chlorosis adds a point to the damage class rating." Table 1984). 1 Damage Classification (From AFZ 425

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