paleo-tsunami workshop report -...
TRANSCRIPT
Report on Training Workshop 0n Awareness and Assessment of Tsunami
Hazards, Banda Aceh, 10 - 20 July 2011 organized by IOC-UNESCO.
Prepared and submitted to UNESCO by
Din Muhammad Kakar, Assistant Professor
Department of Geology, University of Balochistan, Sariab Road Quetta
2
2
Contents Page No
Acknowledgements: ------------------------------------------------------ 3
List of Trainers: ------------------------------------------------------------ 4
List of Pakistani Participants: ------------------------------------------- 4
Introduction: --------------------------------------------------------------- 5 Visit to Tsunami Museum: ----------------------------------------------- 6
Tsunami Deposits Hunt: ------------------------------------------------- 7
Taking core samples and Cross section sampling-------------------- 10
Eyewitness interview: ------------------------------------------------------ 11 Reconstruction and Evacuvation----------------------------------------- 12
Meeting of Pakistani Participants: -------------------------------------- 14
Future plans: Activities to be carried out by the participants: ---- 14
Action to be taken: -------------------------------------------------------- 16
Issues and Problems: ------------------------------------------------------- 17
3
3
Acknowledgements
We would like to thank IOC and UNESCO (UNESCAP) for funding and
organizing this training workshop. We extend our deepest thanks to UNESCO Jakarta
and TDMRC (Tsunami Disaster and Mitigation Research Centre) for hosting the
workshop. Special thanks to Dr. Jane Cunneen of UNESCO for organizing the successful
event, taking care of tickets, communicating all relevant information in time. We would
like to thank Ms Betti Indira , of UNESCO Jakarta for managing tickets for all of us only
one day before our departure to Jakarta. She really has the skills to work hard in very
short span of time. All personals of TDRC specially Dr. Ir M Dirhamsyah and Dr
Mukhlis and others which could not be named here provided all possible facilities during
our stay at Bande Ache and Jakarta. We all also thanks to Ms. Edle Tenden, Programm
officer UN(ESCAP) Thailand for fruit full discussions during the fieldwork and her hard
labor work digging pits for all of us. Although she was a social scientist but she used to
work as Natural scientist.
We highly appreciate the trainers, namely Dr. Brian Atwater (United States
Geology Survey), Dr.Marco Cisternas, Pontificia Universidad Católica de Valparaíso,
Chile, Dr.Kruawun Jankaew, Chulalongkorn University, Thailand, Dr. Srinivasalu,
Anna University,Chennai, India and the host Dr.Eko Yulianto, Indonesian Institute
of Sciences (LIPI). We thank these entire noble scientists for their commitment and
professional approach and communicating and imparting knowledge in a friendly
environment. Useful discussion and their encouragement gave us good opportunity to
learn new techniques.
At the end we also must express gratitude for the dinner arranged by the respected
Vice Mayer of Bande Aceh Madam Iliza S. Jamal. Meeting with Iliza S. Jamal was very
much inspiring and encouraging.
4
4
List of Trainers:
1. Dr. Brian Atwater (United States Geology Survey),
2. Dr.Marco Cisternas, (Pontificia Universidad Católica de Valparaíso, Chile),
3. Dr.Kruawun Jankaew, (Chulalongkorn University, Thailand,)
4. Dr. Srinivasalu, Anna (University,Chennai, India)
5. Dr.Eko Yulianto, (Indonesian Institute of Sciences (LIPI).
List of Participants
1. Mr Ameer Hyder, Geophysicist, Pakistan Meteorological Department Karachi
2. Miss Yasmin Raza , Geologist, at Geological Suervey of Pakistan, Karachi.
3. Mr. Muhammad Danish, National Institute of Oceanography Karachi
4. Mr. Naimatullah Sohoo, National Institute of Oceanography , Karachi
5. Mr Shahid Sheikh, Lecturer, Jamshoro, University, Sindh.
6. Miss Quratulain Shaikh Geologist Ex-Field Assistant, GSP Karachi.
7. Mr. Simon Sadiq Assistant Director Geological Survey of Pakistan Islamabad
8. Dr Haider Hassan, Assistant Professor, NED University Karachi.
9. Mr. Attaullah Mengal, Deputy Director PDMA Balochistan.
10. Prof. Din Muhammad Kakar, Department of Geology, University of
Balochistan
5
5
Introduction: The ten days training workshop in Bande Aceh was very productive and informative for
the Pakistani participants. For the first time, we all worked in a Tsunami hit area, where
every effect of 2004 Tsunami was evident from the surface, looking out the ruins of the
old buildings, dry up and destructive trees, the sea level rise in the coastal regions.
Geologically in the subsurface, the 2004 Tsunami deposits was vey much clear and
convincing having variation in thicknesses following the geographical extent and local
topography. In some places we could not be able to find tsunami deposits due to
biological disturbances. In some field forms we also observed that Tsunami deposits were
intermixed by plough in the field and cannot be differentiated their layer.
Interview the eye witness give us in depth analysis of the Tsunami waves, its
height reaching up to the top of the coconut trees, which account for up to nine meters.
The survivors account also indicated the time difference between the earthquake and
arrival of the 1st wave of the tsunami, which was not less than 30 minutes, which could be
enough to evacuate the population, but due to non- existence of the awareness of tsunami
among the population and the country was did not equipped with early warning system,
the colossal damage was much higher in the region, which is the main dilemma of the
third world countries.
The five trainers were having amazing commitment of working in the field. In the
field for the first time we saw the scientists were working labor work, by digging pits
themselves in extreme hot and in rainy spells. Brian, Marco, Shirini, Wow and the host
Eko were looking busy by working hard work. We Pakistani were initially in denial state
to accept such labor work, but when we asked, why we should not hiring the services of
labor for digging, they replied that you have to dig it, as very much information you will
miss, if this is worked by other persons, so keep having the ownership of the pit not to
6
6
miss a single information when digging. The logic was very much convincing. They told
us very clearly how to recognize and differentiate Tsunami deposits from other layers.
I summarized the activities carried out during the ten days workshop:
Visit to Tsunami Museum:
We were taken to Tsunami Museum of the Bande Aceh. It was the building to
keep reminds the tsunami of 2004 to the world in General and to the Indonesian
generations in particular. The entrance of the build having a tunnel, with darkness, giving
us very sad outlook showing a water flow on a nine meter high wall, an indicative of nine
meter Tsunami wave of 2004. The water flowing sound gives an excellent sense of
Tsunami wave.
Figure 1.Tsunami Museum, showing a nine meter high wall with over flows of water, an indicative of Tsunami waves.
Then this dark tunnel open into a circular shaped Minaret, giving us feeling of heartache
when we saw the name of 10,000 innocent victims of 2004 Tsunami, which they called
the mass grave. We asked about the others victims names, they told us the space still not
enough to put all 167000 names of Bande Aceh Tsunami Victims.
Then we were taken to a hall having much darkness. The hall were having square block
of about three feet height from the ground and a screen on top of these with lighting
7
7
having frame images. The shocking images of the 2004 Tsunami were preserved in these
blocks. Afterwards we went to Exhibition Hall where portraits and models of devastated
city of Bande Ache were displayed.. The models showing situation before and after the
Tsunami. Those portraits and poster were very much striking.
Figure 2: Tsunami Minaret,(mass Grave) Internal side, having 10,000 Tsunami victim names, while in 2nd picture minaret out side view, photo taken from the top of the Tsunami building.
To sum up, this Tsunami Museum is very much important to keep remember the innocent
victims of 2004 Tsunami and the world can see and learn lessons from the devastation of
the Bande Aceh. The coming generation can only be teach to keep preserve these
important events of Tsunami and its destruction in this Museum.
Tsunami Deposits Hunt:
We spent most of the days in the field. The major part of our training was to hunt
Tsunami deposits in different parts of the Bande Aceh, where the Tsunami wave’s
inundation took place. Several pits were dugout in different parts of the Bande Aceh. We
all Pakistanis were experiencing these on hand training by digging pits for the first time
and studying the different depositional layers. On 13th July 2011, the trainers divided us
8
8
in three groups, each group was assigned a place to dig their own pit under the
supervision of trainers and each group need to explain it to other groups. This was good
opportunity given us to practically experience the digging process and the same technique
were to be used in Makran. However, in Makran we don’t expect same and such deposits
as we saw here. The Makran area is arid region and precipitation and vegetation is very
much less than this tropical and humus environment.
Three groups were formed and diggings were started in Lampulo area, selecting
three different areas, in low land, high land to see depositional variation of different
layers.
2004 Tsunami Layer
As clearly evident from the photos No: 3 &4, the top layer is the sediments deposited by
2004 tsunami. The sand layer is overlying on the previous humus soil having very sharp
contact with. The thickness of tsunami layer varies from 5cm to 18cm in different pits
within the 100 meter distance. The sediments shows clear grading, a trend of fining
upward. The lower portion of the sand also contains some fossils shells and occasionally
pebbles and concretions. The 2nd layer in fig 3&4 is of the humus layer, the vegetative
ground present before the 2004 Tsunami. It is organic matter (black layer) is converted
by the process of decay and turned black its vegetations into black organic matter.
Then we encountered a layer of yellowish ash material, probably belong to 1839
volcanic activity took place in the region. This layer in places shows regular pattern of
bedding, while in some place these turned into lenticular bodies, pinch out showing that
at higher places they may be disturbed by the biogenetic activity and at higher place they
may be also eroded due to wind action and could not be preserved.
This volcanic ash is overlying on humus soil which was the original surface at the time of
volcanism. After volcanic ash layer once again we have an other organic matter (Humus
Layer) which once again the original ground before the volcanic activity (Fig4).
9
≈10cm 2004 Tsunami Deposits
Ground before2004 Tsunami Deposits/Humus layer
Up to 5cm volcanic ash deposits, believed to be deposited in 1839, volcanic eruption in this region
≈6cm another sand layer, a candidate for another Tsunami
Another humus sand layer,
≈10cm 2004 Tsunami Deposits
Ground before2004 Tsunami Deposits/Humus layer
Lenticular volcanic ash deposits, May be destroyed by animal or other agriculture/erosion activity
Figure 3 &4. Pits showinlayers Lampuk, Bande
Ground Surface
9
gs 2004 tsunami deposits along with other depositionaAceh Indonesia.(13th July, 2011).
15cm Another Humus layer, before the deposition of volcanic ash
Ground Surface
l
10
10
Fig 5 & 6: Dr. Brian, dewatering pit. In 2nd photo Marco taking core sampling. When the water comes into pit then we have the choice to run rotating hollow bit into ground to take core samples at different depths. Core sampling is also say lot about the subsurface, if properly place and arrange these samples on ground surface. Taking Core samples/ Cross sectional samples We can also use the technique to take core samples by driving a hollow bit machine
operated manually. If the water don’t allow you to work in pit, then you have the choice
to take core samples. During the course of training we also able to get cross cut samples
of different layer. One such cross section of layers encounter in Lampolu samples which
we named Tsunami Mummy (shown in Photo No:7)
Fig:7. The cross sectional sample of a pit showing all layers from top to bottom as shown in fig No.3.
This Tsunami Mummy were brought to the regional workshop in Jakarta.
Eyewitness interview Number of male and female of 2004 tsunami, eyewitness account, were taken. This was
also unique experience when in depth information was taken. The reported height from
II≈10 of Tsunami surge were testified and verified by eyewitness.
1. Mr. Marzaki the Eye witness of 2004 Tsunami
Mr Marzaki (Fig:8) told us that there was a big earthquake on 26 December, at 8.00am.
The trembling was so horrifying and long which he never experienced before. He saw a
wall of water 30 minutes after the earthquake at 8:30am. His mother escape on Motor
bike, he lost his father. He was caught in the wave and taking him 2-3 km from his house
and at the end he took grip of the coconut tree branch and stayed there for two hours. He
could saw lot of people on the top of coconut tree (Life saving trees). When he was asked
what to do if there is an earthquake, he really doesn’t know what to do. Three points can
be established from the account of Mr Marziki.
1). The time between the earthquake and Tsunami arrival is 30 minutes, which is a
enough time for a population to evacuate or take refuge in a safe place before the tsunami
hit. 2) The Tsunami waves height can be clearly establish as the height of coconut trees
are not less than I 7-9 meter. 3). It is surprising that still he don’t know what to do in the
case of earthquake and Tsunami.
Madam Murul of Klaing (Coordinates: 0764937 and 0619298):
After passing seven years of Tsunami, the eye witnesses seems still in trauma, specially
40 years old Madam Murul of Klaing,(Fig:9). when she was explaining the tsunami, she
could not control here feelings and tears in her eyes were visible. She told us that she saw
many dead bodies were floating in water. At the time of Tsunami surge, we did not know
what to do and where to go. Then she escaped in car, when the first low wave came and
during the drive, the car splash water in the way. She told us that after the earthquake, 30
12
12
minutes later the 1st Tsunami waves come, followed by big one. When she was ask that
did she believe that an other Tsunami can come? she told that God knows.
Fig:8 &9.The participants are taking eye witness account with help of the interpreter.Mr Mazaki (in Center still wrap his hand on coconut tree wood).in 2nd picture Madam Marul expressing here views about the Tsunami. In background her mud made bricks are visible. Taking interview is a very careful task, keeping in mind not to hurt the feelings of the interviewee.
Reconstruction and Evacuation Centers:
The world as whole more responsive to post disaster e.g. relief recovery, reconstruction
and less responsive to invest in disaster reduction e.g. preparedness, prevention, and
mitigation. After the 2004 Tsunami International community invest little bit more than
earlier, in Preparedness and mitigation. As Band Aceh was devastated and new Bande
Aceh city has been established on the ruins of old. Different donor agencies wisely
selected the sites for reconstruction near the hills which will be easy to evacuate at the
time of Tsunami (10 a). We also visited TDRC building which is also declared as
evacuation center (Fig:10.b). Only three such building exists in Bande Aceh and each
building have the capacity of 600 to accommodate. More building needed to be built
along the coast.
13
13
.
Fig:11. Newly constructed houses afterb2004 tsunami. It is learnt that the site selection is wisely, in near to the hill, where the people can escape to hill at the event of Tsunami.
Fig:10: TDRC building will also perform as evacuation center at the time of Tsunami. Till date only three building has been constructed near the coast. Each building may capacity to accommodate 600 people
14
14
Meeting of Pakistani Participants to develop future Strategy:
We all Pakistani have given time and space to meet and develop a future strategy
and chalk out a program to work on Makran Tsunami. Two meetings were convened in
the Hotel. Then we shared the points raised in the meeting with Trainers and thoroughly
discussed again. The trainers also give us input about the future strategy. Each and every
participant take the responsibility to carry out the following activities to make the Aceh
workshop beneficial and replicate same activities as done and learn in Aceh workshop. In
addition to these activities. Additional work is also realized to be done in the Makran
region:
Pakistani sharing their plans with trainers in TDRC building. Flip charts prepared earlier in a brain storming session in Hotel. Future plans: Activities to be carried out by the participants
1. Development of Educational Material: Development of Educational Material in
local languages for the awareness of the people of Makran and costal region of
Pakistan. The book “Where the First Wave Arrives in Minutes” Indonesian
Lessons on Surviving Tsunamis near Their Sources” will be translated in local/
regional languages. As the literacy rate especially in women in Makran region is
less than I 6%, so, some pictorial material will be developed for the awareness of
this majority of the population.
15
15
2. Awareness workshop in Coastal region: Awareness workshop in Coastal
region will be carried out with cooperation of the government concerned
departments, specially with Provincial Disaster Management Authority(PDMA).
It is also the mandate of PDMA to raise awareness about the disaster in coastal
region.
3. Paleo-Tsunami deposits studies: Paleo-Tsunami deposits studies along the
Pakistan Coast will be carried out to hunt 1945 Tsunami and other events if the
any occurred in the history of the Makran active subduction zone. Some other
prominent scientist will also be contacted at national and International level to
help out in these studies.
4. Laboratory analysis of the Tsunami sediments: Laboratory analysis of the
Tsunami sediments will be conducted in facilities available at Pakistani
Universities, however, regarding aging of the tsunami sediments and other
techniques will be sort from abroad including the regional countries, like Oman,
India and Iran.
5. Hunt for Archeological / historical documents: As the Makran was part of
Oman in 1945, so the historical documents have may recorded the accounts of
1945 Tsunami will be hunted in Oman and Iran. At governmental level these
countries will be approach to help out about these archeological documents.
6. Interviews of the survivors or next generation to survivors: The important part of
the Tsunami studies is taking the survivors account. Since 1945, 66 years passed
and we still may number of survivors still alive at the age of 74/78, specially the
women of the coastal region have higher age limit. So these survivors will be
contacted immediately before they expire. Their account will help us in our
tsunami studies.
7. Tectonic studies through GPS: As we have already started tectonic studies
(Geodetic Studies) in the region through GPS (Global Positioning System). The
GPS studies are designed to determine tectonic strain rates in the region, and
16
16
subsequently to estimate future seismic hazards. At its simplest the geodetic
strain rate is a measure of seismic productivity.
8. Inundation Modules will be developed: Inundation Modules will be developed
about the coastal region of Pakistan as some of the participants were interested in
such studies. The Modules developed in Iran and Oman will also be considered in
these studies.
9. Application of Geophysical instruments to study subsurface layers: Some of
the Geophysical instruments are available in Pakistani Universities and applicable
for the studies subsurface layers.
10. Logistic support will be sort from the PDAMA: As one of the participants was
from PDMA, and he agreed to provide logistic support during the preliminary
studies in the coastal region of Makran. He will also play a role of coordinator
between the PDMA and the researchers.
11. Historical tidal data: Historical tidal data will be collected from various
concerned departments including Metrological Department and Institute of
Oceanography.
12. Coastal region students/ stockholders: will be kept involved throughout
the length of our work in this region. Local capacity will be developed through
the interaction with the stake holders.
Action to be taken:
1. Developments of Project Proposal: initially a project will be developed for the
above mentioned studies. Dr. Haider Hasan and Professor Din Muhammad Kakar
17
17
took the responsibility to prepare a project proposal and afterwards input will be
asked from all participates of the workshop and will also ask the input of the
trainers.
2. Submission of Proposal to UNESCAP: After a long debate and discussion it
was unanimously decided to submit project proposal to the UNESCAP. We
decided to work under the umbrella of the UNESCAP; however NDMA (National
Disaster Management) authority will be taking in consideration.
3. Development of Coordination with regional countries: It was also discussed
and the input coming from the trainers were also incorporated that regional
countries including Iran, Oman and India will be contacted to accomplish a
regional association as these countries also have the same threat pose by the
Markran Subduction Zone and also cyclones that may hit these countries in the
future.
The expertise of the International Experts: The expertise of the International Experts
including Dr. Brian F. Atwater, Dr. Marco Cisternas, Dr Kruawun Jankaew, Dr. Eko
Yulianto will be sought by Inviting them to Pakistan as project proposal get approved.
Issues and Problems:
a) Security situation in the region:
We also discussed the regional and local issue and hurdles exist in the coastal
region. Prime most was the security situation Balochistan Makran region. Currently the
security situation in Makran is not permissible to work. However, if we kept involve the
local administration, PDMA and DDMAs(District Disaster Management Authrities) and
the stake holder( local Population) of the coastal region, this hurdle will be over come.
The students of the coastal region will be a good source to giving them/involving them in
18
18
these studies, which will create a sense of ownership. We have good relationship with
students of Makran region.
b) Seasonal Harshness:
As in summer, the Makran have extreme high temperature and is not feasible for work,
however, work can be carried out only from November to February as temperature drop
to working conditions.