Proceedings of Symposium on Remote Sensing and Photo Interpretation: Proceedings of Symposium on Remote Sensing and Photo Interpretation

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Multivolume work

Persistent identifier:: 842147969

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Type of content:: Konferenzschrift

Info on language/writing:: Beiträge überwiegend in englischer, teilweise in französischer und deutscher Sprache

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Identifier (digital):: 842147969

Parallel title:: Nebentitel: Proceedings : Symposium on Remote Sensing and Photo Interpretation

Language:: German

Publisher of the original:: Canadian Inst. of Surveying

Other Title:: Nebentitel: Proceedings : Symposium on Remote Sensing and Photo Interpretation

Document type:: Multivolume work

Volume

Persistent identifier:: 84214806X

Title:: Proceedings of Symposium on Remote Sensing and Photo Interpretation

Sub title:: October 7 - 11, 1974, Banff, Alberta, Canada

Scope:: VII, 465 Seiten

DOI:: 10.14463/GBV:84214806X

Year of publication:: 1974

Place of publication:: Ottawa, Ontario

Identifier (digital):: 84214806X

Illustration:: Illustration, Diagramme, Karten

Signature of the source:: T 15 B 1305

Language:: German

Publisher of the original:: Canadian Inst. of Surveying

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

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2015

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: VEGETATION DAMAGE CHAIRMAN. - A. REINHOLD

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: INTERPRETATION OF VEGETATION DAMAGE, EXTENSIVELY MANAGED LANDS. Peter A. Murtha

Document type:: Multivolume work

Structure type:: Chapter

iation estimates were based on the percentage of liye conifers, 30% or more defoliated. The defoliation percentage classes were the same as the mortality classes. Areas of all type& were determined through the use of a dot-grid. However, the average volume loss per acre was determined by an independent ground sample of random cluster plots, and was estimated to be 2.76 m^/ha. (40 cubic feet per acre) for the entire Park. More important for recreation management was the fact that the infestation had caused widespread tree mortal ity on 3,100 hectares of the 20,700 hectares in the park, but most of the heavy mortality was concentrated within 2,392 hectares of the spruce-fir complex. It is erahpasized that the damage survey was done from color-infrared photos taken in September, ~ long after the dead-needle detritus has been rain- washed away from the trees. Several insect survey personnel maintain that the red-brown needle detritus must be on the tree when any budworm damage survey is done. Over the last couple of years, the gypsry moth QPorthetria dispar) has caused defoliation of an estimated 1.4 million acres (566,000 hectares) of forests in the north eastern United States. After a film/filter test, it was concluded that Plus-X film and a 25A filter were a satisfactory combination for mapping total defoliation of hardwoods, however, color-infrared was considered superior for detecting and mapping light and medium forest canopy defoliation (Rohde and Moore, 1973). On a test site in the State of Rhode Island, three levels of hardwood defoliation (light 25-50% defoliated; medium 50-80% defoliated and heavy 80-100% defoliated) were mapped. A chemical herbicide (Tordon 101) was used to control vegetation growth in the International boundary zone between Waterton Lakes National Park, Canada, and Glacier National Park (U.S.A.) in 1968. Some of the herbicide killed trees in the Parks outside the boundary zone. In order to establish a case against future spraying, a survey was done to estimate the damage (tree mortality). 1:6,000 scale color-infrared photos were interpreted by counting dead tree crowns. Since the principal tree species affected were lodgepole pine (Pinus oontorta Dougl.), white spruce (Pioea glauoa (Moench) Voss), and alpine fir (Abies Zasiooarpa (Hook) Nutt.) the small size of the defoliated dead tree crowns dictated the use of the larger scale. Strips of dead trees were noted to adjoin 45% of the forested boundary on the Canadian side and 52.3% on the U.S. side. On the Canadian side 1,490 dead trees were counted whereas 1,236 dead trees were counted on the U.S. side of the boundary (Murtha, 1972,). Since a number of studies have reported on the capability of photo interpretation to delineate bark-beetle caused tree—mortality and defoliator defoliation on medium-, and large scale photos, Ciesla (1974) reported on the use of ultra-small scale (1:126,720) for interpretation of the above noted damage types. Defoliation of ponderosa pine ( Pinus ponderosa Laws) forests by pine butterfly ( Neophasia Tnenapia ( F. & F.)) was readily noted on color—infrared positive transparencies. Photo interpretation of conifer mortality caused by mountain pine beetle ( Dendrootonus ponderosae Hopk.) was only partially successful. Western spruce budworm ( Choristoneura ocoidentalis Freeman) defol iation of current year’s foliage was not resolved on the ultra-small scale

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