METHOD OF DETERMINING AFFECTION OF MOUNTAIN VALLEY WITH AVALANCHE STREAM

摘要

FIELD: ecology.;SUBSTANCE: method comprises phytoindication on age of woody vegetation. Determination of the upper limit of affection of a mountain valley with avalanche stream, at which avalanching no vegetation is left on the slopes of the valley, is carried out by measuring the difference in height between the bottom of the valley and the lower limit of the phytometer - autochthonous birch forests, which grow over the affected slope; assessment of date of affection is determined by measuring the amount of annual rings on wood cores drilled by the age-related borer, or on transverse saw cuts at the base of trunks at the level of root collar of the largest trees in the newly formed growing stocks, renewable in the affected area lower the autochthonous birch forests.;EFFECT: method enables to improve efficiency of detection of signs of hazardous natural phenomena.;1 dwg, 1 ex