Nepali Times Asian Paints
Nation
Thinking the unthinkable



p12
KUNDA DIXIT

It's that time of the year again, as Nepal gears up to mark another anniversary of the devastating 8.4 magnitude earthquake that struck Kathmandu at 2:30 pm on 15 January 1934, and killed at least 10,000 people.

As in previous years, government ministers will give speeches all next week and light lamps at disaster preparedness workshops. But the consequences of an earthquake of similar strength to the one nearly 80 years ago in 1934 are so unthinkable that no one seems to know where to start.

The public is aware of what an earthquake can do, but few are building seismic-resistant homes, retrofitting weak structures, or planning for the aftermath of a disaster. Historical records show that a big earthquake strikes central Nepal every 70 years: the next one is due any day now.

Earthquakes cannot be predicted exactly because scientists can't tell when the tectonic stress is ready for release. However, it is certain another 8.4 magnitude earthquake will strike Kathmandu, we just don't know when. In one scenario, 60 per cent of the buildings in Kathmandu Valley will be destroyed, more than 100,000 people will be killed outright depending on the time of day, and three times that number injured.

Many of the 12 big hospitals in Kathmandu will be damaged, and there will be few open spaces left for survivors. International relief will not get through because of damaged airports and roads. Casualties will be even higher if the quake strikes during school hours.

p12a

However, awareness generation, donor pressure, and scare tactics seem to be finally shaking up the government. "There is more awareness about earthquakes and preparedness," explains Amod Dixit of the National Society for Earthquake Technology-Nepal (NSET).

Two earthquakes struck Haiti and Chile in 2010. More than 300,000 people were killed in Haiti, and fewer than 600 were killed in Chile, even though it was a much bigger earthquake, mainly because the Chileans have better preparedness and stricter building codes. "Nepal has Chile-like earthquakes in a Haiti-like environment," says Dixit, "but we can also be Chile-like if we are prepared like they were."

Despite political instability and an aversion to long-term disaster planning, the government is finally beginning to retrofit schols and hospitals, implementing building codes, planning for prevention, and disaster relief.

Nepal took a big step forward in 2009 with the National Strategy for Disaster Risk Management. A new National Disaster Management Authority will be formed, and the National Planning Commission will integrate climate change and disaster reduction risk management into its development strategy.

The government along with international partners has also formed the National Risk Reduction Consortium (NRRC) to prepare for future disasters, including earthquakes with school and hospital retrofitting on top of the priority list. The consortium includes the Asian Development Bank (ADB), the Red Cross, UNDP, World Bank, AusAid, DFID, the EU, Japan, the US Embassy, and WHO.

Pradip Koirala of the Disaster Management Section at the Ministry of Home Affairs says work has been done, but there is much left to do:"We have identified 83 open spaces for evacuation in Kathmandu Valley, emergency water supply, and sanitation."

Kathmandu is ranked number one in the top 10 cities around the world where a catastrophic earthquake is imminent. But John Galetzka of the California Institute of Technology says Nepal today is better prepared after the Haiti and Japan quakes. "Remember that the UN mission in Haiti suffered, and they don't want that to happen again in Nepal," Galetzka explained, "they also know they will have to step in for relief and rehabilitation after a future disaster."

Foreign embassies and donor agencies have their own post-earthquake evacuation plans, they coordinate relief strategies for citizens, and conduct regular drills. Foreign earthquake experts have tried to convince Nepali authorities that spending a dollar on prevention and preparedness will save hundreds of dollars in post-disaster relief. But until recently, no one was listening.

Man B Thapa, manager of UNDP's Comprehensive Disaster Risk Management Program, says: "If you understand the value of preparedness you can reduce risk, so a school built without proper safeguards is not a good investment."
Because the task is so overwhelming, it has been difficult to figure out where to start. The government has decided that schools and hospitals are the most urgent, and has undertaken an ambitious retrofitting campaign with donor support (see box).

The Kashmir and Sichuan earthquakes in the last 10 years were wake-up calls because of the thousands of children who died under collapsed classrooms. Most schools in Nepal are private and housed in buildings not designed as schools. Says NSET's Dixit: "If we were a rich country we'd demolish them all and build stronger schools. But we're not."

NSET is working with the government to retrofit 50 schools every year in Kathmandu Valley to make them seismic resistant, and 300 schools will be strengthened in the next four years. The UN Office for Disaster Risk Reduction inspected every school in Kathmandu Valley last year and the overall target in the near future will be to retrofit nearly 1,000 additional school buildings.

Retrofitting schools is important because besides helping to save lives, the buildings themselves can serve as shelters in the aftermath of a future earthquake.


p12b

Early warning

Although earthquakes cannot be predicted with any accuracy, earthquake alarms are available that give up to half-a-minute warning of an impending earthquake by detecting the first tremors. One earthquake alarm available in specialised stores senses the P wave (compression wave, pictured in seismograph above) that first radiates out of an earthquake. These waves travel faster than S wave (shear wave) which are more destructive. The alerts can give homes, offices, and schools up to 30 seconds to flee to safer places, but the early warning depends on how close and deep the epicenter is.

To order: www.earthquakestore.com


p13

Fit again

The Tri-Padma Vidyashram School in Lalitpur is a model for a government school that has been strengthened to withstand earthquake shocks that are magnified by Kathmandu's alluvial soil. Tri-Padma's old masonry structures have been retrofitted with concrete beams and columns, and the walls strengthened with steel rods. The school also conducts regular drills so children and teachers are prepared when the real one hits. The students then take that awareness to their homes and alert other family members. Retrofitted buildings like the Balkumari School (pictured right) aren't just safer, they can also serve as shelters in the aftermath of an earthquake.

KATHMANDU #1
Kathmandu tops the list of the 10 cities in the world most vulnerable to a catastrophic earthquake in a survey put out by the US-based GeoHazards International.

1. Kathmandu, Nepal
2. Istanbul, Turkey
3. New Delhi, India
4. Quito, Ecuador
5. Manila, Philippines
6. Islamabad, Pakistan
7. San Salvador, El Salvador
8. Mexico City, Mexico
9. Izmir, Turkey
10. Jakarta, Indonesia

WHAT TO DO

Before earthquake
• Identify safest place in every room under furniture or against aninterior wall away from windows, shelves.
• Practice 'drop, cover and hold on'
• Bolt bookshelves, cabinets and other tall furniture to wall
• Hang pictures and mirrors away from beds, couches
• Install earthquake alarm that detects P-waves and gives up to 30 seconds advance warning

During earthquake
• Protect head and neck.
• Follow 'drop, cover and hold on' to go down on your knees and under at able. Hold on the table.
• Keep away from shelves, windows, staircases and balconies.
• If you are in bed, stay there, curl up and hold on. Protect your head with a pillow, don't rush out.

Source: Red Cross

Emergency kit
Experts recommend being prepared to be self-sufficient for at least three days. Store household disaster kit in an easily accessible location. Put contents in a large, watertight container easily to move.
• Medications and first aid
• Drinking water
• Non-perishable food items
• Flashlights with solar chargers
• Portable radio with extra batteries
• Water purifiers
• Digging equipment, rope, whistle
• Copies of important family documents
• Cash
• Duplicate set of keys

Source: National Society for Earthquake Technology, Nset

Strongest recent earthquakes

Event Casualties and damage
Haiti Mw* 7.0
January 2010
At least 310,000 people killed. 300,000 injured. 1.3 million displaced. 97,294 houses destroyed. 188,383 damaged in Port-au-Prince.
New Zealand Mw 7.0
September 2010
Two people seriously injured, six bridges and many buildings damaged in the Christchurch area.
Taiwan Mw 7.7
September 1999
At least 2,400 killed. Over 8,700 injured. 82,000 housing units damaged, and 600,000 left homeless.
Chile Mw 8.8
February 2010
At least 523 people killed, 24 missing, about 12,000 injured, 800,000displaced and at least 370,000 houses, 4,013 schools, 79 hospitals and 4,200 boats damaged or destroyed by the earthquake and tsunami.
Japan Mw 9.0
March 2011
At least 15,703 killed. 5,314 injured. 130,927 displaced. 332,395 buildings, 2,126 roads, 56 bridges and 26 railways destroyed or damaged by earthquake and tsunami.

Source: USGS Earthquake hazards program. *Mw: moment magnitude scale and retains the continuum of values in the Richter magnitude scale.

What will Kathmandu look like after an earthquake?

Photo gallery by Bikram Rai

See also:
Where the quake will hit hardest, RUBEENA MAHATO
Kathmandu is woefully unprepared for the next Big One



1. Naresh, Fire Fighter

It is very interesting article. Thank you. I would like to request journalists to write article on local risks. In everyday we response 5-7 fire events in the city. None of our government officers and international NGOs and UN agencies have given priority for Fire prevention and local risk reduction.Β  In our opinion ( fire-fighters of Nepal), comprehensive disaster management programme should focus to reduce daily risk and hazards and we can plan for sudden disaster like earthquake. I am not educated in aboard but from my job I know what risk in the city here is at Kathmandu. Β 

in earthquake resistant schools at Kathmandu, building might be ( i am not sure even that because the materials used to constructΒ  the building is not properly quality controlled in Nepal) resistant , how about evacuation route , fire drill and open space around the school ? none of experts based at Nepal have raised these issues.

Naresh

One of the fire fighters of KMC

Β 



2. Ravi Sharma
NTU's ground-breaking study warns of more great quakes in the Himalayas

A research team led by scientists from Nanyang Technological University (NTU) has discovered that massive earthquakes in the range of 8 to 8.5 magnitudes on the Richter scale have left clear ground scars in the central Himalayas.

This ground-breaking discovery has huge implications for the area along the front of the Himalayan Mountains, given that the region has a population density similar to that of New York City.

NTU Professor Paul Tapponnier, who is recognised as a leading scientist in the field of neotectonics, said that the existence of such devastating quakes in the past means that quakes of the same magnitude could happen again in the region in future, especially in areas which have yet to have their surface broken by a temblor.

Published recently inΒ Nature Geosciences, a prestigious scientific journal, the study by NTU's Earth Observatory of Singapore (EOS) and colleagues in Nepal and France showed that in 1255 and 1934, two great earthquakes ruptured the surface of the earth in the Himalayas. This runs contrary to what scientists have previously thought.

Massive earthquakes are not unknown in the Himalayas, as quakes in 1897, 1905, 1934 and 1950 all had magnitudes between 7.8 and 8.9, each causing tremendous damage. But they were previously thought not to have broken the earth's surface - classified as blind quakes - which are much more difficult to track.

However, Prof Tapponnier said that by combining new high resolution imagery and state of the art dating techniques, they could show that the 1934 earthquake did indeed rupture the surface, breaking the ground over a length of more than 150 kilometres, essentially south of the part of the range that harbours Mt Everest.

This break formed along the main fault in Nepal that currently marks the boundary between the Indian and Asian tectonic plates - also known as the Main Frontal Thrust (MFT) fault.

Using radiocarbon dating of offset river sediments and collapsed hill-slope deposits, the research team managed to separate several episodes of tectonic movement on this major fault and pin the dates of the two quakes, about 7 centuries apart.

"The significance of this finding is that earthquakes of magnitude 8 to 8.5 may return at most twice per millennium on this stretch of the fault, which allows for a better assessment of the risk they pose to the surrounding communities," said Prof Tapponnier.

Prof Tapponnier warns that the long interval between the two recently discovered earthquake ruptures does not mean people should be complacent, thinking that there is still time before the next major earthquake happens in the region.

"This does not imply that the next mega-earthquake in the Himalayas will occur many centuries from now because we still do not know enough about adjacent segments of the MFT Mega-thrust," Prof Tapponier explains.

"But it does suggest that areas west or east of the 1934 Nepal ground rupture are now at greater risk of a major earthquake, since there are little or no records of when last earth shattering temblor happened in those two areas."

The next step for Prof Tapponnier and his EOS scientists is to uncover the full extent of such fault ruptures, which will then allow them to build a more comprehensive model of earthquake hazard along the Himalayan front.


Source:http://www.eurekalert.org/pub_releases/2012-12/ntu-ngs122812.php



3. Yam Gurung

Wish we has a leader who really care for Nepal and the people???...



Leave a Comment

Name (required)

Mail (will not be published)(required)

    Please read our terms of use

LATEST ISSUE
638
(11 JAN 2013 - 17 JAN 2013)


ADVERTISEMENT









himalkhabar.com            

NEPALI TIMES IS A PUBLICATION OF HIMALMEDIA PRIVATE LIMITED | ABOUT US | ADVERTISE | SUBSCRIPTION | TERMS OF USE | CONTACT