PROTECTION FORESTS IN THE ALPINE SPACE ; LITERATURE REVIEW ; NATIONAL CRITERIA FOR THE DEFINITION OF PROTECTION FORESTS ; AUSTRIA ; Regulations ; Definitions ; Management ; FRANCE; GERMANY; ITALY ; SLOVENIA ; SWITZERLAND ; PROTECTION FOREST STRUCTURE AND NATURAL HAZARDS ; “Protection forest management in practice in the AS – a silvicultural and economical survey”; Definition for practitioners ; Forest effect on Rock Slope Failure ; Soil Slope Failure ; FLUVIAL PROCESSES ; PROTECTION FORESTS COMPARED TO ARTIFICIAL PROTECTION MEASURES ; QUANTIFICATION OF FOREST’S PROTECTIVE EFFECTS ; QUANTIFICATION OF PROTECTIVE EFFECTS OF ARTIFICIAL PROTECTION MEASURES ; PROTECTIVE EFFECT OF FOREST AND GREY MEASURES AGAINST AVALANCHES ; Protective effects of the forest against snow avalanches ; Protective effect of artificial measures against snow avalanches ; PROTECTIVE EFFECT OF FOREST AND ARTIFICIAL STRUCTURES ON ROCK SLOPE FAILURES ; Protective effect of the forest against rock slope failures ; Protective effect of artificial measures against rockfall ; PROTECTIVE EFFECT OF FOREST AND ARTIFICIAL STRUCTURES ON SOIL SLOPE FAILURES ; Protective effect of forest against soil slope failures ; Protective effect of artificial measures against soil slope failures ; PROTECTIVE EFFECT OF FOREST AND ARTIFICIAL STRUCTURES ON FLUVIAL PROCESSES ; Protective effect of the forest against floods ; Protective effect of artificial measures against floods ; PROTECTIVE EFFECT: FORESTS VS. ARTIFICIAL MEASURES