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46 N

10 E

GIS and DENDROCHRONOLOGICAL

TECHNIQUES for AVALANCHE

HAZARD MAPPING

GIS and DENDROCHRONOLOGICAL

TECHNIQUES for AVALANCHE

HAZARD MAPPING

POTENTI AL

RISK

CLASSES

class 1

class 1

class 3

class 3

class 2

class 2

> 4 0 %

< 4 0 %

coverage

Pas tu res and naked g round

2 5 4 t r e e s/ h a

1 1 5 t r e e s/ h a

m e a n n u m b e ro f t rees per ha .

DENSI TY AND COVERAGE

STUDY AREAS:STUDY AREAS:AI MS OF THE W ORK:AI MS OF THE W ORK:

T o u n d e r st a n d t h e a v a l a n ch ea ct i v i t y o f a p e cu l i a r s it e

T o recons t ruc t spa t ia l ex t en t o fpas t ava lanches

T o m a p a v al a n ch e r i s k o n t h eb a se o f t o p o g r ap h i c al a n dvege ta t iona l pa rame t e rs , i n

o rde r to ge t R IS K MA PS

T o eva lua te the p r o tec t i ver o l e o f t h e v e g et a t i o n

GRASS GI S

DENDROCHRONOLOGY

MORPHOLOGI CAL RISK MAPVEGETATI ON MAP

s lo p e m a p

TOPOGRAPHICAL CRITERI A

D i g i t a lE levat ion

Model

Dig i ta l

E levat ion

Model

a sp e ct m a p

VEGETATI ON MAP

VEGETATI ON MAP

RISK MAP

RISK MAP

MORPHOLOGICAL

RISK MAP

MORPHOLOGICAL

RISK MAP

Fores tM a n a g e m e n t

Plan

Fores t

M a n a g e m e n t

Plan

c a t eg o r i e s o f t h evege ta t i on

% s p e ci e s

dens i t y , cove rage

Giovann i COMUNELLO* , Marco BEZZI* , MarcoCio l l i *

* D e p a r t m e n t o f En v i r o n m e n t a l a n d Ci v i l

En g i n e e r i n g - U n i v e r si t y o f T r en t o ( I t a l y )V i a M e si a n o 7 7 , 3 8 1 0 0 T r e n t o t e l . 0 4 6 1 / 8 8 2 6 2 5

e-mai l : g iovann i . comunel lo@emai l . i t ;

marcobezz i@inwind.com

Tof Larch trackDETERMI NATI ON OF POTENTI AL RI SK

I NVOLVI NG FOREST AREAS W I TH GRASS:

DETERMI NATI ON OF POTENTI AL RI SKI NVOLVI NG FOREST AREAS W I TH GRASS:

D e fi n i t io n o f :

MORPHOLOGI CAL AVALANCHE RISK

d e p e n d e n t o n :

TOPOGRAPHI CAL FEATURES OF

GROUND SURFACE

D e fi n i t io n o f :

MORPHOLOGI CAL AVALANCHE RISK

d e p e n d e n t o n :

TOPOGRAPHI CAL FEATURES OF

GROUND SURFACE

Two avalanche tracks in Pejo Valley:

Tof Larch track Val dei Spini track

Va l de i Sp in i track

Tools

D e fi n i t io n o f :

POTENTI AL RISK

d e p e n d e n t o n :

VEGETATI ON PATTERN

( i . e. c o ve r a ge a n d d e n si t y ,

t r e es p e r h a . )

D e fi n i t io n o f :

POTENTI AL RISK

d e p e n d e n t o n :

VEGETATI ON PATTERN( i . e. c ov e r ag e a n d d e n si t y ,

t r e e s p e r h a .)

Th e se i n f o r m a t i o n a r e

o v e r la y ed t o o b t a in t h e

RISK MAP

Th e se i n f o r m a t i o n a r e

o v e r la y e d t o o b t a in t h e

RISK MAP

Slope changes

i n s i d e m i n i m u m s u r f a ce s

(625 m2)

M i n i m u m s u r f a c e (625 m2)

S l op e c h a n g e _ _ _ _ _ _ _ _

South-Eas t expos i t ion

Tof Larch trackVa l de i Sp in i track

( 10)

s lope: 28 < < 5 5

m i n i m u m s u r f a ce s ( 6 2 5 m 2)

s lope changes : 1 0

( 10)

1

2

compressione

trazione

3

1 2 0

3 1 0

1

2

compressione

trazione

3

1 2 0

3 1 0

Proceedings ofthe Open source GIS -GRASS users conference 2002 -Trento, Italy, 11-13 September 2002

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