The integration between data and conventional monitoring system in order to update the Arpa Piemonte landslide inventory

Arpa PiemonteL. Lanteri World Landslide Forum - Rome 3-7 october 2011

The integration between satellite data and conventional monitoring system in order to update the Arpa Piemonte landslide inventory

Luca Lanteri , Alessio Colombo, Sara di PrioloArpa Piemonte - DT Geologia e Dissesto

The integration between satellite data and

conventional monitoring system in order to update

the Arpa Piemonte landslide inventory

Arpa PiemonteL. Lanteri Second World Landslide Forum - Rome 3-7 october 2011

The integration between satellite data and conventional monitoring system in order to update the Arpa Piemonte landslide

inventory

Arpa Piemonte is in charge of the maintenance of the framework about the hydrogeological instability of the Piemonte region.

Introduction

Starting from the end of '70, the Geological Survey of Piemonte Region collects information concerning flooding, landslides, geomechanical characteristics of earths and rocks and is in charge of the management and the development of the regional landslide-monitoring system. In 2002 all this topics was moved into the ARPA Piemonte (Regional Agency for Environmental Protection) where the Thematic Department “Geologia e Dissesto” continues to maintain this valuable resource up to date. A first 1:100,000 regional landslide mapping was carried out for the entire regional territory in the first part of '80s.

1:100,000 regional landslide map



From 2000 to 2005 the IFFI project (The Italian landslide Inventory) contributes to increase the level of knowledge and allow to product a national homogeneous landslide information system. In 2005, on the bases of IFFI results, about 470.000 single phenomena have been identified and analysed in the whole Italy.

Introduction

35,023 landslides in Piedmont Region



SIFRAP (The landslide inventory of Piedmont) was born in 2005 as an evolution of

the IFFI project.

Arpa Piemonte, continues to feed and to develop the inventory by:

Database evolution; Developing of new tools for analisys and manage data; Inventory updating; Data spreading;

SIFRAP – Landslide inventory

All this activities are achieved during the istitutional work and by the European INTERREG Project.

One of the main goal of working package B2 of the ALCOTRA European Project RISKNAT is focused to improve the knowledge of the SIFRAP, in particular on the more serious phenomena where detailed examination is needed.



In order to effectively organize and manage informations all data are now

stored in a geographic PostgreSQL/PostGIS database, also containing the

whole Geological Information System of Arpa

Main advantages:

multiuser editing (both geographic and alphanumeric);

related information can now be simply linked together;

Real time intersection of the most significant data with landslide geometry;

easier data analisys and data mining.

Data can be queryed by different open source and proprietary tools

SIFRAP – Database evolution



Up to now the inventory contains 36'271 landslides

The inventory defining three levels of landslide knowledge, depending on the available information:

I – basic information

II – detailed form

III – in-depth monograph

SIFRAP – The landslide inventory



Monitoring data

Arpa manage several devices installed all over Piemonte to monitor landslides that occur close to facilities or built-up areas. The network includes about 300 monitored sites, up to now. The monitoring network includes many sites with few, mostly conventional instruments (inclinometers, piezometers, extensometers, and topographic benchmarks)



Geotechnical data

The Geological database of Arpa contain information about 9800 borehole log data and 6000 geotechnical laboratory analisys



inventory

20102008200620001992 2012

PSInSAR™ processing of 614 radar images from ERS

satellites, covering the period 1992-2001 over the entire Piemonte, ~ 25000 km2Over then 2.2 M of PS

Investigations carried out by Arpa

ERS 1 e 2 platformPeriod 1992-2001

Investigations carried out by other institutions

The PSInSARTM SqueezeSarTM Arpa Piemonte

project, 2010

Processing by Telerilevamento Europa-TRE of RADARSAT

images, time span 2003-2009, over the Western Alps, ~ 12.000

km2Over then 1.8 M of PS

The first regional experience in the

world

1999 PSInSAR™ technique born

2011

We are now in order to acquire all the northen

alpine arc coverege with RADARSAT images

2003-2009

PST of minambiente coverage of the whole

regional territory with ERS 1-2 e ENVISAT data

Time span 1992 – 2010 Over then 2.4 M of PS

DInSAR project in Piedmont



inventoryLandslide inventory updating

This multidisciplinary analysis allow to

detecting new landslides (A)change of the boundaries and/or the typology of existing landslides (B)determinate the state of activity of landslides (C)individuate the possible buildings damaged by landslides displacement (D)

35 new landslides where identified using PS data426 anomalous areas interpreted as landslidesIn 67 cases PS data was used to define state of activitiesIn 74 cases PS data was used to define state of activities

A B C

Mov. versante

Cedimento del tetto

D



Monitoring data

Borehole log/prove di laboratorio

Satellite interferometric data

Historical/archives data

Photointerpretation – Field Survey

SIFRAP / BDG

Geoprocessing

PDF Report

WebGIS

Landslide inventory updating

The monitoring data was coupled with detailed morphological analysis, carried out mainly by air-photo interpretation and, in second place, with some aimed field survey. Also the analysis of the geotechnical database of Arpa has allowed to obtain a more exhaustive geo-mechanical framework.



more serious phenomena,

monitoring landslides,

landslides triggered during heavy rain events,

landslides involving houses and facilities.

The result of analisys:

Azione B2_h

Up to now about 190 landslides with a

2°level of knowledge

Expected about 300 at the end of the

project

Outcomes



SIFRAP – 3° livello

Realizzazione di monografie di estremo

dettaglio per alcuni fenomeni di particolare

interesse.

Le monografie sono state utilizzate anche per

gli approfondimenti effettuati su RME (Aree a

Rischio Molto Elevato)

(Convenzione 2010 con OO.PP Regione

Piemonte)

Azione B2_h



SIFRAP – 3° livello

Descrizione dettagliata del fenomeno

Profilo interpretativo

Censimento delle opere di mitigazione e difesa

Analisi elementi esposti

Considerazioni su pericolosità e rischio



PAI (1999)

No other data thenState of activity


Borgofranco d'Ivrea: loc. baio Dora



IFFI (2006)

I liv.: shape Typology State of activity





II liv.: Scheda di dettaglio

SIFRAP (2009)




SIFRAP (2011)

III liv.: Detailed monography





Valprato Soana (TO) – cod. 001-00940-00

PS perfectly agrees with monitoring data

A A

B B

CC



Monitoring data diverging from PS

mean vel -6.2 mm/yLoreglia (VB) – cod. 103-00940-00

no movement



GPS data and PS have a good agreement.

I dati PS concorrono ad una miglior definizione spaziale del fenomeno.

Integrano le informazioni di movimento lungo l'asse verticale (scarsamente

rilevabile mediante sistema GPS)



inventory

Comune di Novalesa: loc. Rocciamelone

Remote control helps us to better manage monitoring systems

Data integration

2007

2010



The RISKNAT Project was a chance to reorganize the database and to

improve our knowledge on landslides:

Efficiently data organization;

Detailed regional frame of more interesting phenomena.

multidisciplinare ed integrazione di dati derivanti da diverse fonti (dati

telerilevati, monitoraggio, fonti documentali, rilievi diretti) per ottenere un

modello gelogico interpretativo robusto dei fenomeni.

Easly access of information by end users (Enti, Pubblici, Professionisti);

Satellite data



The integration between monitoring system and satellite data allows to define a

more detailed quadro cinematico-evolutivo.

PS data integrate the punctual information of monitoring system with a more

spatially-wide spreaded information.

Evidenziano un movimento generale dell'interno versante, confermano

sostanzialmente la suddivisione del versante in zone a diversa evoluzione già

definita in precedenza.

Remarks



L'inventario rappresenta uno strumento conoscitivo fondamentale per la

gestione del territorio sia nelle attività di pianificazione sia in fase di

emergenza.

L'organizzazione dei dati all'interno del geo-database permette un

efficiente utilizzo dei dati e la possibilità di effettuare analisi spaziali in

tempo reale.

Per mantenere la base dati efficiente e funzionale è necessario mantenerla

costantemente aggiornata e con un livello conoscitivo adeguato

Satellite data



inventory

http://www.risknat-alcotra.orghttp://www.arpa.piemonte.it

[email protected]

Thanks

Luca Lanteri Alessio Colombo Arpa Piemonte - DT Geologia e Dissesto

Technology

The integration between data and conventional monitoring system in order to update the Arpa Piemonte landslide inventory