ROOTREINFORCEMENTOFGRAPEVINESANDITSEFFECTONSLOPESTABILITYTHECASESTUDYOFTHEOLTREPO’ PAVESEALESSIOCISLAGHI1,2GIANBATTISTABISCHETTI1,218thJune 2019, Milan, Italy1DepartmentofAgriculturalandEnvironmentalSciences(DiSAA),UniversityofMilan,Italy2CentreofAppliedS

R OOT REINFORCEMENT OF GRAPEVINES AND ITS EFFECT ON SLOPE STABILITY

T HE CASE STUDY OF THE O ^LTREPO ’ P ^AVESE

A ^LESSIO C ^ISLAGHI

^1,2

G

IAN

B

ATTISTA

B

ISCHETTI^{1,2 1}Department of Agricultural and Environmental Sciences (DiSAA), University of Milan, Italy

2 Centre of Applied Studies for the Sustainable Management and Protection of Mountain Areas (Ge.S.Di.Mont), University of Milan, Via Morino 8, Edolo, 25048 Brescia, Italy

L ^ANDSLIDE H ^AZARD

 L ^ANDSLIDE H ^AZARD

The European Commission considers landslide risk as a major threat in mountainous and hilly area across Europe producing serious impact on population, properties and infrastructures [European Commission, 2012].

11/2018 – Omiš City – Croatia www.suedtirolnews.it Image courtesy of online newspapers

03/2015-Ventimiglia (IM)-Italy

02/2017 – Spring Mountains (California) 02/2014 – Faedis (UD) - Italy 04/2014 – Cinque Terre (SP) – Italy

02/2014 –

San Pietro di Feletto (TV) – Italy

11/2018 – Valdobbiadene (TV) – Italy

 L ^ATEST N ^EWS

Vineyards

Natural hazards Buildings with wine cellars and roads

[31st May 2019]

1.INTRODUCTION 2.AIMS 3.MATERIALS AND METHODS 4.RESULTS 5.CONCLUSIONS

R ^{OLE OF} V ^EGETATION

 V EGETATION AND S ^LOPE S ^TABILITY

Slope stability

M

^ECHANICAL

M

^ECHANISMS

H

YDROLOGICAL

M

^ECHANISMS

wind loading

[Cislaghi, 2018]

1.INTRODUCTION 2.AIMS 3.MATERIALS AND METHODS 4.RESULTS 5.CONCLUSIONS

 R ^OOT R EINFORCEMENT

B

^ASAL

R

^OOT

R

EINFORCEMENT

3

1 2

3

1 ^L

^ATERAL

^R

^OOT

^R

EINFORCEMENT

2

R

^OOT

R

EINFORCEMENT UNDER

C

OMPRESSION

Images courtesy of Massimiliano Schwarz

[Cislaghi, 2018]

A ^{IMS OF THE} S ^TUDY

 A ^IMS

 Q UANTIFY

R OOT D ENSITY

 Q ^UANTIFY

R OOT R EINFORCEMENT OF GRAPEVINES

 M ^EASURE

B IOMECHANICAL P ROPERTIES

Image courtesy of Massimiliano Bordoni

C ^ASE S ^TUDY

 C ^{ASE STUDY} : N ^ORTH -E ^AST O ^LTREPO ’ P ^AVESE

[Bordoni et al., in preparation]

F ^IELD C ^AMPAIGN

 T RENCH M ETHODS

[B OHM , 1979]

 I MAGE A NALYSIS

 C OUNTING R OOTS

 R OOT DENSITY

L ^ABORATORY M EASUREMENTS

 R OOT DENSITY AND B IOMECHANICAL PROPERTIES

Image analysis [Bischetti et al., 2005]

Tensile test in laboratory

[Bischetti et al., 2003]

M ^ODELLING

 R ^OOT D ISTRIBUTION AND

R ^OOT R EINFORCEMENT M ^ODELS

CALIBRATION AND APPLICATION:

R

OOT

D

ISTRIBUTION

M

ODEL (SCHWARZ ET AL., 2010)

CALIBRATION AND APPLICATION:

RBM

W

- R

OOT

B

OUNDLE

M

ODEL (SCHWARZ ET AL., 2010)

R ^ESULTS

 R OOT DENSITY AND R ^OOT D ISTRIBUTION

Observations

Root density -> 70-110 roots/m

²

Root depth -> 0.95 m

From the Literature

Root density -> 50-580 roots/m

²

Root depth -> 0.5-6.0 m

Calibration and Simulation of

Root density -> 50-160 roots/m

²

 B IOMECHANICAL PROPERTIES

Diameter (mm)

Te ns ile f or ce ( N )

Root tensile strength was not influenced by:

-location

-grapevine plants age -type of vineyards

-seasonality

Rootstocks:

420A and SO4 with the same combination of -Vitis berlandieri

-Vitis riparia

Grapevine cultivars:

-Croatina -Uva Rara

-Barbera

1.INTRODUCTION 2.AIMS 3.MATERIALS AND METHODS 4.RESULTS5.CONCLUSIONS

 S ^OIL - REINFORCEMENT PROVIDED BY GRAPEVINE ROOTS

Root distribution

Analysis at large scale

From 1 kPa at 1.30 m to 9 kPa at 0.20 m

Root reinforcement

Mechanical properties

?

C ^ONCLUSIONS

 C

ONCLUSIONS

/F

UTURE

P

ERSPECTIVES

• T

HE PRESENT STUDY INVESTIGATED THE

R

^OOT

R

EINFORCEMENT PROVIDED BY THE GRAPEVINE PLANTS

;

• T

^HE

R

ESULTS SHOW THE POSSIBILITY TO ADOPT THIS APPROACH IN SIMILAR CONTEXT WITH

R

^ELIABILITY

;

• T

HE METHODOLOGY ALLOWS TO INCORPORATE THE

V

^INEYARDS

C

HARACTERISTICS INTO A SLOPE STABILITY MODEL

;

• C

URRENT STUDY FOCUSES ON THE DETERMINATION OF THE

E

^FFECTS

ON ROOT REINFORCEMENT DUE TO DIFFERENT AGRICULTURAL PRACTICES

(B

ORDONI ET AL

.,

IN PREPARATION

);

• F

UTURE IMPROVEMENTS ARE TESTING THE PROCEDURE IN DIFFERENT GEOGRAPHICAL LOCATIONS AND CLIMATIC CONDITIONS AND TAKING INTO ACCOUNT THE LOCAL DISCONTINUITIES

(

^TERRACES

,

^DRAINAGE

SYSTEMS

,

^ETC

.).

[https://www.quvestra.com]

HANKS FOR THE ATTENTION

[email protected] [email protected]