01 Introduction and Overview (1)

Krautblatter – Wunderlich - Straub LANDSLIDES SS 2012

Geodetical Monitoring of Landslide Processes– Concepts, Instrumentation, Evaluation, Analysis

Thomas WUNDERLICH, Technische Universität München

Krautblatter – Wunderlich - StraubLandslides


Contents of Part 1

Natural Hazards

Landslides

Introduction toGeodetical Monitoring


Global Natural Disasters 2010


Munich RE: event categories


Number of events with trend (1950 – 2010)


Overall and insured losses worldwide (1950 – 2010)


Risk

UN/ISDR, 2004

risk = expected impact (EI) x propability of occurence (PO)

risk priority figure = EI x PO x capability of reaction TUM BWL, 2006


Experts teaming up in natural risk management

Environmental Engineers(Umwelting. – Kulturtechniker)

Geologists Hydrologists Civil Engineers Geodesists Geophysicists Meteorologists Geographers … and some more


Demand for geodesists in natural risk management

FIG, 2006


Geodetic disciplines and their contribution

• Earth System Research• Physical Geodesy• Remote Sensing• Land Management• Geoinformatics (GIS)• Engineering Surveying• Photogrammetry• Cartography• Satellite Geodesy

understanding global coherencesglobal reconnaissanceregional reconnaissanceland use planning – hazard zoningdata modelling and provisionmonitoring & early warningswift local reconnaissancemapping and orientationpositioning and navigation


Creating risk awareness and providing information!


natural hazard evidence maps

Bayerisches Landesamtfür Umwelt


Initiative InnovaRISK(since 2004)


Landslides


Trigger for Landslides

Landslides, though generally disposed geologically are frequentlycaused resp. activated by other occurrences, called triggers:

earthquakes

volcanism

erosion

heavy rain, flooding, snowmelt

freeze-thaw cycle, upward movement of permafrost line

structural interventions in slope equilibrium

Extent of losses of minor importance according reassurancecompanies, but clearly increasing – alpine space most affected!


Over all the peaks it is peaceful [Goethe] – but below?


Geodetical Monitoring

GNSS-based procedures (global)

Remote Sensing (regional)

Terrestrial procdures (local)

Triangulation / Trilateration (conventional precision surveying)

Tacheometry / Total Stations as Observation Robots (TPS)

Laserscanning (TLS)

Ground based interferometric Synthetic Aperture Radar (Gb-SAR)

Geotechnical explorations, Fibre Optic (Strain) Sensors (FOS)

Geo Sensor Networks (GSN)


Comparing accuracy and range

geotechnical< 1 mm

relative

geodetical1mm < 10 mmTPS or GPS

absolute

remote sensing> 10 mm

(over short periods)

monitoring method

< 100 m < 1500 m / 3000 m region covering


First exemplary considerations


Deformations of 4 m in 20years


Long term monitoring – technology change problem

intervisibility between stationscommon reception of

min = 4 satellite signals


Deformations 1987-2010 (horizontal – vertical)


3d movements and point velocities


continuous monitoring by low-cost GNSS

Inst. f. Geodäsie, UniBw München


what „alpine“ means …


Areal deformation measurement by TLS


Areal deformation measurement by TLS


Searching for hot spots by Gb-SAR


Open Air Laboratory for master students GG & EE

Institute for Geodesy, GIS and Land Management


Thuro, Wunderlich, Heunecke, 2006

Integrative earlywarning system foralpine instable slopes


finden alert thresholds – setting up emergency plans


Autonomous monitoring of natural targets (non-cooperative)

Wasmeier, 2006

Testing area Sudelfeld, BY


[Quelle: Geomatik Seminar, Wasmeier]

Image Assisted Total Station 2 for robotic observation


Feature-matching by 2 videometric tacheometers

Reiterer, 2011


DeMONTES — Deformation Monitoringby High Resolution Terrestrial Long Range Sensing

Laufzeit: 2012-2013Finanzierung: EU (FP7)

Projektsumme: ca. 1.0 Mio. €Für TUM: Dr. Alexander Reiterer

Forschungskonsortium:

Lehrstuhl für Geodäsie,Technische Universität

München

Institut für Informations- undKommunikationstechnologien,

Joanneum Research Graz (Österreich)

Center for Machine Perception,Czech Technical University

(Tschechien)

Dibit Messtechnik,Innsbruck (Österreich)

Cautus Geo,Lier (Norwegen)

Geo ImagiNicosia (Zyp


Interdisciplinary EU research project with LfU

Climate Change, Impacts andAdaptation Strategies in theAlpine Space



thuderstorms arriving more often and heavier


Preparing for cascading extreme events

water destabilizing land land barring watercourse


Certainly, geodesy is not a must …

01 Introduction and Overview (1)

Documents

areal deformation

natural risk

geodetical

krautblatter

landslides

straub

tls

sterreich