preliminary co-seismic landslide inventory map for bahía...

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Bahía de Caráquez

80°24'0"W

80°24'0"W

0°40'0

"S

0°40'0

"S

Preliminary Co-seismic Landslide Inventory Map for Bahía de Caráquez, Ecuador

0 1 20.5km

Interpretation

International Charter Disaster Activation 564, coordinated byUNOSAT.This inventory was prepared in rapid mapping mode using acombination of satellite image interpretation and sourcinginformation from news reports and crowdsourcing.No liability concerning the content or use thereof is assumed by theproducer. Product published 25 April 2016 and designed forviewing at A0 paper size.

Data sources

This satellite image interpretation shows a landslide inventorymap produced by the British Geological Survey. The scale ofmapping was between 1:1,000 and 1:10,000 and the satelliteimage resolution is 0.5 m. Insets show detailed mapping.Some 475 landslides were identified in the Bahía de Caráquezarea; 395 translational/falls, 9 rotational, 43translational/rotational, and 26 dominated by liquefaction (mainlyof tidal deposits). Many events occur at the top of the slope(topographic amplification). 377 landslides (79%) have nodiscernible impact; 41 landslides affect at least part of a road; 7potentially affect houses. Liquefaction of tidal deposits resulted infailure of dikes in 3 locations, with dike stability affected at 15other locations. This inventory requires field verification.

WGS84 Geographic (DMS)Geographical system: µCartographic information

Framework

Satellite data:

Vector data:Cities, Boundaries © OpenStreetMap

Pleiades © CNES 2016, Distribution Airbus DS

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Puyo

Tena

Macas

Quito

Ibarra

Tulcan

Ambato

RiobambaBabahoyo

Guaranda

Guayaquil

Esmeraldas

La TacungaPortoviejo

Ecuador

Colombia

Legend

Disaster coverage by the InternationalCharter 'Space and Major Disasters'. Formore information on the Charter, which isconcerned with assisting the disaster relieforganizations with multisatellite data,please visit www.disasterscharter.org

Contact Information:unosat@unitar.org

24/7 Hotline: +41 75 411 4998www.unitar.org/unosat

Contact Information:landslides@bgs.ac.uk

www.bgs.ac.uk

(Imagery acquired 19 April 2016)

\ EpicenterDominant Landslide Type

Liquefaction, flow

RotationalTranslational

Translational, rotational" Town