THE
TSUNAMI HAZARD ASSESSMENT IN THE NORTHERN AEGEAN SEA
Barbara Theilen-Willige
Berlin University
of Technology (TU Berlin),
Institute of Applied Geosciences, Department of Hydrogeology
and
Bureau of Applied Geoscientific Remote Sensing (BAGF),
Germany.
ABSTRACT
Emergency planning for the assessment of tsunami hazard
inundation and of secondary effects of erosion and landslides,
requires mapping that can help identify coastal areas that are
potentially vulnerable. The present study reviews tsunami susceptibility
mapping for coastal areas of Turkey and Greece in the Aegean
Sea. Potential tsunami vulnerable locations were identified from
LANDSAT ETM imageries, Shuttle Radar Topography Mission (SRTM,
2000) data and QuickBird imageries and from a GIS integrated
spatial database. LANDSAT ETM and Digital Elevation Model (DEM)
data derived by the SRTM-Mission were investigated to help detect
traces of past flooding events. LANDSAT ETM imageries, merged
with digitally processed and enhanced SRTM data, clearly indicate
the areas that may be prone to flooding if catastrophic tsunami
events or storm surges occur.
Science of Tsunami
Hazards, Vol. 27, No. 1, page 1 (2008)
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LARGE
BOULDERS ALONG THE RABAT COAST (MOROCCO) ; POSSIBLE EMPLACEMENT
BY THE NOVEMBER, 1st, 1755 A.D. TSUNAMI
Nadia
Mhammdi, Fida Medina
Université
Mohammed V-Agdal, Institut Scientifique, Département des
Sciences de la Terre, Rabat, Morocco.
Dieter
Kelletat
Universität
Köln, Institut für Geographie, Koeln, Germany.
M'Fedal
Ahmamou, Lamiaa Aloussi
Université
Mohammed V-Agdal, Faculté des Sciences, Département
des Sciences de la Terre, Rabat, Morocco.
ABSTRACT
The rocky coastline
south of Rabat (Morocco) shows a large number of boulders lying
upon the lithified dune system. The boulders, of 4-100 tons,
may be single, in imbricated sets, or forming clusters and ridges.
Several of the boulders were lifted and overturned, thus showing
pool apertures downwards. Transport distance is generally decametric
because of the surface roughness, but it can reach 300 m in flat
areas. All boulders have been detached from their initial position
at the fractured front of the active cliff. Quantification with
the help wave hydrodynamics and rock displacement mechanics shows
that dislodgement and transport of these boulders were accomplished
rather by tsunami than by storm waves. Although no dating was
attempted, post-emplacement bio-erosion by littorinids and the
absence of any erosional features below the boulders suggests
that they were emplaced during the 1st November 1755 AD Lisbon
tsunami.
Science of Tsunami
Hazards, Vol. 27, No. 1, page 17 (2008)
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TSUNAMIS
OF THE ARABIAN PENINSULA
A GUIDE OF HISTORIC EVENTS
Benjamin
R. Jordan
Department
of Geology
Brigham Young University
Rexburg, Idaho, U.S.A.
ABSTRACT
The Arabian Peninsula
has been affected by tsunamis in the past. The Peninsula is
bounded by the Persian Gulf on its northeast side, the Red Sea
on its west side, and the Arabian Sea, the Gulf of Aden, and
the Indian Ocean to its east and south. Each of these areas
is very different geographically, tectonically, and bathymetrically.
Only two, localized tsunamis have been recorded in the Red
Sea and one, doubtful, tsunami in the Persian Gulf. Almost all
of the recorded tsunamis along the Arabian Peninsula have occurred
on its eastern and southern edge, some, such as the one formed
by the 1945 Makran earthquake, were extremely destructive. The
Indian Ocean is the most likely source area for future destructive
tsunamis that would impact the Arabian Peninsula.
Science of Tsunami
Hazards, Vol. 27, No. 1, page 31 (2008)
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A
STUDY OF GROUNDWATER QUALITY IN TSUNAMI
AFFECTED AREAS OF SIRKAZHI TALUK, NAGAPATTINAM
DISTRICT, TAMILNADU, INDIA
N.
Ravisankar and S. Poongothai
Department of Civil
Engineering
Faculty of Engineering and Technology
Annamalai University, Annamalainagar, India.
ABSTRACT
The 26, December 2004 tsunami had major impact on the quality
of groundwater along the south¬east coast of India, but especially
in the tsunami-affected areas of the Nagapatinam district of
Tamilnadu. Major pollution resulted primarily from increases
in the salinity of groundwater. The post-tsunami water quality
posed problems to general health and contributed significantly
to agricultural and environmental degradation in the Sirkazhi
taluk and Nagapattinam districts. The adverse impact was particularly
significant in the areas of Pazaiyar, Madavaimedu, Thirumullaivasal,
Thoduvai, Koozaiyar, Puthupattinam, Kizhamoovarkarai, Poombhukar
and Vanagiri. The present study assesses the source, degree,
extent and nature of groundwater contamination in the Sirkazhi
coastal region. Samples of groundwater were collected from 11
wells in this area and analyzed chemically to determine the extent
of contamination. The results showed significant variations in
water quality parameters in the study area and helped understand
the longer-term adverse impacts that tsunami inundation can have
upon groundwater resources.
Science of Tsunami
Hazards, Vol. 27, No. 1, page 47 (2008)
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