Share This

Saturday, November 11, 2017

Penang landslides and flooding: are natural disasters man-made?

It’s hard to deny when the effects of climate change are all around us


 Andrew Sheng says that from increasingly intense hurricanes to regional landslides and flooding, it’s clear our actions are effecting the environment. But, it’s also evident that there are ways for us to avert disaster and change course


AFTER two Category 5 hurricanes (Harvey and Irma) hit the US in October, followed by Maria hitting Puerto Rico, no one can deny that natural disasters are devastating.

With three hurricanes costing an estimated US$385bil, with less than half insured, the poor are suffering the most because they cannot afford to rebuild as the rich.

This year alone, monsoon floods in Bangladesh, India and Nepal have left millions homeless. This year will therefore break all records as Munich Re-insurance data suggests that 2016 natural disaster losses were only US$175bil, already 28.6% higher than the 30 years (1986-2015) annual average of US$126bil.

But how much of these natural disasters are man-made?

Despite US President Trump being sceptical of climate change, the US Global Change Research Program Climate Science Report published this month concludes that “it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century”.

Carbon dioxide concentration already exceed 400 parts per million, last occurred about 3 million years ago, when both global average temperature and sea level were significantly higher than today. Roughly one third of carbon emission is due to residential heating/cooling, one third for transport and one third for industrial production.

Human activities on Mother Earth include over-consumption of natural resources, cutting down forests, polluting waters and excessive cultivation/development that caused desertification or soil erosion. You see this from warmer surface and oceanic temperatures; melting glaciers; diminishing snow cover; shrinking sea ice; rising sea levels; ocean acidification; and declining tree and fish stock.

Oceans warming up

Hurricanes are caused by oceans warming up, building energy and vapour levels that create freak typhoons, tornados and massive downpours. At the same time, droughts are also occurring with more frequency for longer.

Scientists estimate that global average sea level has risen by about 7-8 inches since 1900, with almost half that rise occurring since 1993. Everyday, we hear new extreme events, such as unusually heavy rainfall, heatwaves, large forest fires, floods or landslides.

Climate warming is most observable in the water-stressed Middle East and the North Africa/Sahel region, where rapid population growth created desertification, food shortages, civil conflicts and ultimately, outward migration towards cooler climates, especially Europe. This hot region accounts for 60% of global war casualties since 2000, with 10 million outward refugees. About 90% of the world’s refugees and asylum seekers come from four regions with half under the age of 18 years.

A 2016 World Bank report estimated that these water-stressed countries’ GDP could be reduced by up to 6%, with dire consequences on stability. Without water, industries cannot function, food cannot be cultivated and health can deteriorate due to disease from water-shortage and drought.

European estimates suggest that each refugee costs roughly US$11,600 per person to maintain and there are already one million trying to enter Europe last year. The OECD has classified countries such as Afghanistan, Central African Republic, Iraq, Somalia, Sudan, Syria and Yemen as extreme fragile.

Critical point

The world is already reaching a critical turning point. If the Paris Climate Accord can be implemented, with or without the United States, there is some chance of averting further global warming.

But closer home, we are already witnessing the effects of climate change on our daily lives.

In 1972, Hong Kong experienced a devastating landslide near Po Shan Road in Mid-Levels, which caused 67 deaths and collapse of two buildings. One cause was unstable ground following heavy rainfall from Typhoon Rose eleven months prior to the incident.

This tragedy in densely populated Hong Kong resulted in rigorous slope protection and inspection of drains to ensure that these slips do not occur again. I lived near Po Shan Road and admired how Hong Kong engineers regularly inspected the slope protection measures and that the drains were always clear.

In 1993, the collapse of Highland Towers in Kuala Lumpur was partly attributed to the clearing of the hilltop above Highland Towers, which led to soil erosion and the weakening of the foundations. By the time the residents detected cracks in the buildings, it was already too late. Some of my personal friends were among the 48 persons who were killed in that collapse.

Last weekend, Penang (where I live) had the worst rainstorm and floods because we were hit by the tail end of strong winds from Typhoon Damrey, one of the strongest to hit Vietnam in 16 years, leaving 61 people dead. Driving along Penang Bridge, I can see that the continued hilltop developments in Penang are leaving soiled scars on the previously pristine landscape, I am reminded of Highland Towers and Po Shan incidents. Natural disasters are acts of god, but the size of their impact on human lives are completely within our control.

Soil erosion

Soil erosion does not happen overnight, and require responsible developers and conscientious governments, as well as concerned citizens, to be continually vigilant that maintenance of roads and drains, including soil inspections, are serious business with serious consequences.

Modern technology can provide drones and inbuilt sensors that can detect whether erosion is reaching critical levels. Regular maintenance of drains and checks on stability of the soil, especially where there has been recent clearing of trees in steep slopes, will forewarn us all of impending accidents.

As cities are building more and more on hillsides subject to torrential rain, Penang should seek technical expertise from Hong Kong which has extensive expertise on the maintenance of steep hill slopes that are subject to typhoons and sudden rainfall.

Landslides are today used more in political terms than in real terms. The next time landslides happen, residents who watch daily the erosion of their natural environment will know who is really looking after their interests.

Andrew Sheng 




Related links:

No hill land approvals since 2008?

by penangforum
Former MBPP councillor Dr Lim Mah Hui wrote this piece for the press in his personal capacity: I wish to comment on the press statement by Jagdeep Singh Deo as reported in Berita Daily and many other newspapers on 24 October.

PKR rep cries for a stop to hillside development - Nation

Related posts:


Behind BJ Cove houses at Lintang Bukit Jambul 1 is an IJM Trehaus Project.  Approximate Coordinates : 5°20'38.47"N,100°16'...
Becoming bald: A view of the clearing work seen at Bukit Relau which was visible from the Penang Bridge in November last year. GEORGE
Choong (in white) surveying the deforested hillslope next to Majestic Heights. PENANG MCA has raised concerns about the safety of the r...

Why did MBPP approve the Tanjung Bungah development project? Read more at https://www.malaysiakini.com/letters/399357#qbRd534yu1JfC551....

Becoming bald: A view of the clearing work seen at Bukit Relau which was visible from the Penang Bridge in November last year. GEORGE...
Seeking solutions: Penang Forum member and soil expert Dr Kam Suan Pheng giving her views during the dialogue sessio
Council should not bow to development or political pressure, says city councilor, Khoo ‘Politicians should be ‘wakil rakyat’ and n...
https://youtu.be/kslhytLg-Wc Hills, landslides and floods: What to do?   The mega floods in Penang which followed the landslide...
Speaking out: Penang Forum members protesting outside the CAP office in George Town. Don’t just make it about worker safety  

https://youtu.be/QB45Q2_mOG0 Suspicious activity: A photo taken from Penang social activist Anil Netto's blog showing an active 
 
GEORGE TOWN: Penang has tabled a higher deficit state Budget of RM740.5million for the next fiscal year of 2018. Chief Minister Lim Guan ...
Humans Are Destroying the Environment   PETALING JAYA: They are supposed to be guardians of the environment, and yet “certain enforcem..

Penang flooding: are natural disasters man-made?

It’s hard to deny when the effects of climate change are all around us


 Andrew Sheng says that from increasingly intense hurricanes to regional landslides and flooding, it’s clear our actions are effecting the environment. But, it’s also evident that there are ways for us to avert disaster and change course


AFTER two Category 5 hurricanes (Harvey and Irma) hit the US in October, followed by Maria hitting Puerto Rico, no one can deny that natural disasters are devastating.

With three hurricanes costing an estimated US$385bil, with less than half insured, the poor are suffering the most because they cannot afford to rebuild as the rich.

This year alone, monsoon floods in Bangladesh, India and Nepal have left millions homeless. This year will therefore break all records as Munich Re-insurance data suggests that 2016 natural disaster losses were only US$175bil, already 28.6% higher than the 30 years (1986-2015) annual average of US$126bil.

But how much of these natural disasters are man-made?

Despite US President Trump being sceptical of climate change, the US Global Change Research Program Climate Science Report published this month concludes that “it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century”.

Carbon dioxide concentration already exceed 400 parts per million, last occurred about 3 million years ago, when both global average temperature and sea level were significantly higher than today. Roughly one third of carbon emission is due to residential heating/cooling, one third for transport and one third for industrial production.

Human activities on Mother Earth include over-consumption of natural resources, cutting down forests, polluting waters and excessive cultivation/development that caused desertification or soil erosion. You see this from warmer surface and oceanic temperatures; melting glaciers; diminishing snow cover; shrinking sea ice; rising sea levels; ocean acidification; and declining tree and fish stock.

Oceans warming up

Hurricanes are caused by oceans warming up, building energy and vapour levels that create freak typhoons, tornados and massive downpours. At the same time, droughts are also occurring with more frequency for longer.

Scientists estimate that global average sea level has risen by about 7-8 inches since 1900, with almost half that rise occurring since 1993. Everyday, we hear new extreme events, such as unusually heavy rainfall, heatwaves, large forest fires, floods or landslides.

Climate warming is most observable in the water-stressed Middle East and the North Africa/Sahel region, where rapid population growth created desertification, food shortages, civil conflicts and ultimately, outward migration towards cooler climates, especially Europe. This hot region accounts for 60% of global war casualties since 2000, with 10 million outward refugees. About 90% of the world’s refugees and asylum seekers come from four regions with half under the age of 18 years.

A 2016 World Bank report estimated that these water-stressed countries’ GDP could be reduced by up to 6%, with dire consequences on stability. Without water, industries cannot function, food cannot be cultivated and health can deteriorate due to disease from water-shortage and drought.

European estimates suggest that each refugee costs roughly US$11,600 per person to maintain and there are already one million trying to enter Europe last year. The OECD has classified countries such as Afghanistan, Central African Republic, Iraq, Somalia, Sudan, Syria and Yemen as extreme fragile.

Critical point

The world is already reaching a critical turning point. If the Paris Climate Accord can be implemented, with or without the United States, there is some chance of averting further global warming.

But closer home, we are already witnessing the effects of climate change on our daily lives.

In 1972, Hong Kong experienced a devastating landslide near Po Shan Road in Mid-Levels, which caused 67 deaths and collapse of two buildings. One cause was unstable ground following heavy rainfall from Typhoon Rose eleven months prior to the incident.

This tragedy in densely populated Hong Kong resulted in rigorous slope protection and inspection of drains to ensure that these slips do not occur again. I lived near Po Shan Road and admired how Hong Kong engineers regularly inspected the slope protection measures and that the drains were always clear.

In 1993, the collapse of Highland Towers in Kuala Lumpur was partly attributed to the clearing of the hilltop above Highland Towers, which led to soil erosion and the weakening of the foundations. By the time the residents detected cracks in the buildings, it was already too late. Some of my personal friends were among the 48 persons who were killed in that collapse.

Last weekend, Penang (where I live) had the worst rainstorm and floods because we were hit by the tail end of strong winds from Typhoon Damrey, one of the strongest to hit Vietnam in 16 years, leaving 61 people dead. Driving along Penang Bridge, I can see that the continued hilltop developments in Penang are leaving soiled scars on the previously pristine landscape, I am reminded of Highland Towers and Po Shan incidents. Natural disasters are acts of god, but the size of their impact on human lives are completely within our control.

Soil erosion

Soil erosion does not happen overnight, and require responsible developers and conscientious governments, as well as concerned citizens, to be continually vigilant that maintenance of roads and drains, including soil inspections, are serious business with serious consequences.

Modern technology can provide drones and inbuilt sensors that can detect whether erosion is reaching critical levels. Regular maintenance of drains and checks on stability of the soil, especially where there has been recent clearing of trees in steep slopes, will forewarn us all of impending accidents.

As cities are building more and more on hillsides subject to torrential rain, Penang should seek technical expertise from Hong Kong which has extensive expertise on the maintenance of steep hill slopes that are subject to typhoons and sudden rainfall.

Landslides are today used more in political terms than in real terms. The next time landslides happen, residents who watch daily the erosion of their natural environment will know who is really looking after their interests.

Andrew Sheng 




Related links:

No hill land approvals since 2008?

by penangforum
Former MBPP councillor Dr Lim Mah Hui wrote this piece for the press in his personal capacity: I wish to comment on the press statement by Jagdeep Singh Deo as reported in Berita Daily and many other newspapers on 24 October.

PKR rep cries for a stop to hillside development - Nation

Related posts:


Behind BJ Cove houses at Lintang Bukit Jambul 1 is an IJM Trehaus Project.  Approximate Coordinates : 5°20'38.47"N,100°16'...
Becoming bald: A view of the clearing work seen at Bukit Relau which was visible from the Penang Bridge in November last year. GEORGE
Choong (in white) surveying the deforested hillslope next to Majestic Heights. PENANG MCA has raised concerns about the safety of the r...

Why did MBPP approve the Tanjung Bungah development project? Read more at https://www.malaysiakini.com/letters/399357#qbRd534yu1JfC551....

Becoming bald: A view of the clearing work seen at Bukit Relau which was visible from the Penang Bridge in November last year. GEORGE...
Seeking solutions: Penang Forum member and soil expert Dr Kam Suan Pheng giving her views during the dialogue sessio
Council should not bow to development or political pressure, says city councilor, Khoo ‘Politicians should be ‘wakil rakyat’ and n...
https://youtu.be/kslhytLg-Wc Hills, landslides and floods: What to do?   The mega floods in Penang which followed the landslide...
Speaking out: Penang Forum members protesting outside the CAP office in George Town. Don’t just make it about worker safety  

https://youtu.be/QB45Q2_mOG0 Suspicious activity: A photo taken from Penang social activist Anil Netto's blog showing an active 
 
GEORGE TOWN: Penang has tabled a higher deficit state Budget of RM740.5million for the next fiscal year of 2018. Chief Minister Lim Guan ...
Humans Are Destroying the Environment   PETALING JAYA: They are supposed to be guardians of the environment, and yet “certain enforcem..

Friday, November 10, 2017

Sustainable Development in Penang

Why did MBPP approve the Tanjung Bungah development project?
Read more at https://www.malaysiakini.com/letters/399357#qbRd534yu1JfC551.99 
https://www.malaysiakini.com/letters/399357

The never ending torrential rain in Penang over the weekend was an act of God. A natural phenomenon which is a perpetual feature of our equatorial climate. Nobody would wish to have the heavens open up with such vengeance on any state.

Naturally, when the rain intensity is so great, floods will occur. We should always be vigilant during the annual monsoon season.

Flood mitigation starts from the local council and state government. Every council must take into consideration the terrain, rainfall and built up surfaces in their area. While we can always engineer ourselves out of a flood, there is always a cost versus benefit consideration. There are some low-lying areas in a flood plain that will perpetually be flooded when it rains and if we situate developments in those areas, we have to be prepared for such events.

On a small island like Penang, with its hilly terrain, engineering flood mitigation measures must be a long term and all-inclusive plan encompassing all urban growth zones. It will not be cheap, mainly due to the high land cost and the expense incurred to provide adequate storage for the surface runoff.

As the island develops, open permeable spaces will continue to diminish causing higher runoff to flow downstream into the coastal areas. Couple that with tidal phenomenon and the incoming surface runoff will easily overwhelm the drainage system causing a rise in water level.

The question we should all be asking is how do we reduce the incidence of flooding? Unfortunately, especially with our tropical climate, it is quite impossible to entirely eliminate flooding. Anybody that promises that is telling you a blatant lie.

With the right planning and engineering, we can reduce the incidence of flooding and lower the magnitude of the damage caused.

Penang’s terrain bears much similarity to Hong Kong. Being in the path of tropical storms and typhoons from the Pacific Ocean, Hong Kong bears the brunt of some of the regions worst storms. On average, six tropical cyclones slam into Hong Kong every year. While flooding still occurs in Hong Kong, they have managed to reduce the damage it causes.

There are many lessons Penang can learn from Hong Kong.

If DAP still wants to continue to develop the state in a sustainable manner, they must implement special flood mitigation requirements in addition to the ones provided by the JPS Masma manual. If the hills are being cleared, the increased runoff will tax the existing drainage system. Siltation will occur, evident from the brownish flood waters, as topsoil and sediment from the hills wash down into the coastal plain. These sediments, unless periodically maintained, will clog existing waterways, thus reducing drainage efficiency.

The ultimate problem with highly built up areas is the immense volume of runoff from storms. Sufficient storage areas in the form of retention ponds and green open areas should be provided to retard the flow of water into the rivers.

Due to its terrain and the high-density development on the island, it is expensive to provide adequate stormwater storage within a development.

Catchment areas next to hillslopes also have a large volume of runoff moving at a high velocity. The damaging effect of erosion is quite evident on many of these hill projects. Sometimes water currents are so strong, even paved roads can be ripped apart.

Some of the more innovative solutions for Hong Kong’s flooding problems like the underground stormwater storage system has worked very well over the years together with a comprehensive Drainage Master Plan.

The Drainage Services Department of the Hong Kong SAR constructed massive underground tanks to route surface runoff intercepted from uphill catchments during storms only to slowly release the stormwater into the natural waterways when the storm abates.

The Penang state government has a duty of care to the residents of Penang to ensure that disasters of such proportion should not happen.

Over the past four years, a total of 119 incidences of flooding has been recorded in Penang. Penang is an economic powerhouse and home to some of the world most high-tech electronics producers.

The state government has to provide a safe and secure environment for investor to house their production facilities and assets. Otherwise, multinationals might shun the island because of the cost of protecting and insuring their priceless assets. Productivity would be affected and the cost to remedy the damage.

We will only find out the true financial cost of this disaster over the next few weeks.

For Penang to recover from this tragedy, federal funding is required to repair all the damaged infrastructure within the state.

The very least they can do is to provide a COMPETENT flood mitigation plan for the state starting with a comprehensive Drainage Master Plan Study.

The Penang government has to be ACCOUNTABLE to the people and not private developers. If certain waterways and catchment areas have to be gazetted as permanent drainage and storage areas, then so be it.

The safety and well-being of the Rakyat has to come first. Lastly, in the interest of  TRANSPARENCY, Penang has to launch an inquiry into how the local council approved property developments on Class III slopes without adequate slope protection.

The collapse of many retaining structures and slope failures in such risky locations is cause to for concern because as of right now, any dwelling structure located downstream to those development could possibly be the scene for the next Highland Towers.
Kong Len Wei@konglen wei

Source: by Kong Len Wei, a Civil engineer  and councilor for Majlis Perbandaran Manjung and the Chairman of MCA Youth Perak Young Professional’s Bureau


Related Links

'The Penang government has voluminous guidelines but why are landslides still happening?'

'The Penang government has voluminous guidelines but why are landslides still happening?'
www.malaysiakini.com


Related posts

Who is responsible: developer, contractor, local council or house-owner for the damages? 

 

Behind BJ Cove houses at Lintang Bukit Jambul 1 is an IJM Trehaus Project.  Approximate Coordinates : 5°20'38.47"N,100°16'...
Becoming bald: A view of the clearing work seen at Bukit Relau which was visible from the Penang Bridge in November last year. GEORGE...
Choong (in white) surveying the deforested hillslope next to Majestic Heights. PENANG MCA has raised concerns about the safety of the r...
https://youtu.be/kslhytLg-Wc Hills, landslides and floods: What to do?   The mega floods in Penang which followed the landslide...
Council should not bow to development or political pressure, says city councilor, Khoo ‘Politicians should be ‘wakil rakyat’ and n...

Three slammed over finwall tragedy GEORGE TOWN: An incompetent engineer, a irresponsible one and a neglectful senior civil servant hav...