geotechnical damage on the 2017 iran iraq...
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GEOTECHNICAL DAMAGE ON THE 2017 IRAN – IRAQ EARTHQUAKE
Prof. Miyajima Masakatsu & Hendra Setiawan February 15th, 2018
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Geotechnical damage was found in the following location:
Piran waterfall (Rock fall) - A
Ban Zardeh Village (Rock fall) - B
Maskane Mehr & Fooladi District, Sarpol-e-Zahab City (liquefaction-induced ground deformation) – C
Palan-e Olya Village, close to Salas-e-Babajani Town (Soil surface rupture, ground subsidence) – D
Mela Kabod & Goorchi Bashi Villages (Massive landslides) - E
Survey
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Fig. 1 Location of geological damage occurred
0 10 miles
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The average shear wave velocity for the top 30 m (Vs30) map
Fig. 2 Vs30 map of Iran deduced from ASTER digital elevation model.
Karimzadeh, S., et al., 2017, “From a GIS-based hybrid site condition map to an earthquake damage assessment in Iran: Methods and trends”,International Journal of Disaster Risk Reduction 22, pg. 23-36
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Aggregated geology map
Fig. 3 aggregated geology map of Iran
Karimzadeh, S., et al., 2017, “From a GIS-based hybrid site condition map to an earthquake damage assessment in Iran: Methods and trends”,International Journal of Disaster Risk Reduction 22, pg. 23-36
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0 10 miles
Piran Waterfall (A)
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Piran Waterfall
Fig. 4 location of Piran waterfall
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Piran Waterfall
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Fig. 5 (a & b) Rock fall in Piran waterfall
Piran waterfall is one of the tallest waterfall in Iran. The height is around 100 m.
Located around 9 km from Sarpol-e-Zahab city. This waterfall is registered in the list of national and
natural relics.
a
b
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0 10 miles
Ban Zardeh Village (B)
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Ban Zardeh Village
Fig. 6 location of Ban Zardeh village
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Ban Zardeh Village
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Fig. 7 (a,b and c) Rock fall in Ban Zardeh Village that block the road between the village and Baba Yadegar tomb
a
cb
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12http://historicaliran.blogspot.jp/2009/12/baba-yadegar-shrine.html
Fig. 8 (a & b) Baba Yadegar tomb
a b
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0 10 miles
Maskane Mehr & Fooladi District, Sarpol-e-Zahab City ( C )
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Maskane Mehr & Fooladi District, Sarpol-e-Zahab City
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0 1296 ft
Fig. 9 Location of Maskane Mehr and Fooladi District, Sarpol-e-Zahab
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Maskane Mehr & Fooladi District, Sarpol-e-Zahab City
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Fig. 10(a and b) Ground deformation in Maskane Mehr/Fooladi District
There is a river in this area, close to ground deformation location. According to the residents, before the earthquake, City government planned to relocate the residents due to the shallow
ground water table in this area. It is likely that this ground deformation appeared due to liquefaction occurrence in the subsoil layer.
Maskane Mehr & Fooladi District, Sarpol-e-Zahab City
a
b
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0 10 miles
Palan-e Olya Village (D)
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Palan-e Olya Village
Fig. 11 location of Palan-e Olya village
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Palan-e Olya Village
Fig. 12 (a, b and c) Ground subsidence in Palan-e Olya village
a
b
c
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Palan-e Olya Village
Fig. 12 (a & b) Soil rupture in Palan-e Olya village
Soil rupture occured with the length around 1 km
a b
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0 10 miles
Mela Kabood & Goorchi Bashi Villages (E)
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Mela Kabood & Goorchi Bashi Villages
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Fig. 13 Location of massive landslides near Mela Kaboodand Goorchi Bashi villages
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Mela Kabood & Goorchi Bashi Villages
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Fig. 14 (a & b) Massive landslides near Mela Kabood and Goorchi Bashi villages
ba
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Mela Kabood & Goorchi Bashi Villages
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Fig. 15 (a & b) Soil rupture occurred near Mela Kaboodand Goorchi Bashi villages
a b
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Mela Kabod & Goorchi Bashi Villages
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c
b
a
Fig. 16 (a, b & c) Ground subsidence
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Mela Kabod & Goorchi Bashi Villages (Displacement map)
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7 m of slip related to Mela Kabod landslidetrigerred by November 12th 2017.
Areas without clear fringe patterns representincoherent areas.
When there is a rugged surface within the pixelor the surface changes by land formation,landslides, two SAR signals cannot interfere witheach other and loks like “sprayed sands”.
Fig. 17a Ground displacement using Sentinel-1 and ALOS-2 SARdata (Karimzadeh, 2017)17b & 17c Groud displacement occurred (Vajedian,Twitter)
a
b c
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Mela Kabod & Goorchi Bashi Villages
a c
b
Fig. 18 (a,b & c) Damaged building dueto landslides
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THANK YOU VERY MUCH
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