Singapore has been hit by floods in an otherwise thought dry month of June. This is not the usual period where heavy rainfall is expected. The unusual rainfall patterns around the world is causing many of the drainage systems in cities to overflow and systems are unable to cope, thus causing damages to properties and worse, life lost. Rainfall is a natural phenomenon and water needs time to flow out to the sea or to low lying ground. It's a matter of simple physics. What engineers do is to create channels, canals, drains to transport the large amount of water from one place to another, usually to reservoirs or to the sea. These are only man-made engineering measures, which require considerable time and resources to construct. Land has to be reserved for such massive structures, and a balance usually has to be reached for the use of the land.
Unfortunately, our prediction of rainfall and modelling of stormwater flows is dependent on statistics and predictions can become haywired because of changing weather patterns. How to convince governments to spend resources, set aside land otherwise used for businesses/population, for sufficient drainage systems when it is just a risk which is not guaranteed? No modelling systems is accurate, because the inputs are not assurance of the future occurence, just a possibility. After all, it is risk mitigation.
Extracted from Channel News Asia
Govt to bring forward plans to improve drainage in flood-prone areas
By Mustafa Shafawi and Joanne Chan
Posted: 19 July 2010 1434 hrs
SINGAPORE: The government will bring forward plans to improve drainage in major canals and drains in flood-prone areas. There will also be an urgent review of the Stamford Canal which overflowed and caused the June 16 and July 17 floods in Orchard Road. With Singapore hit by three floods in just a month, the issue dominated Parliament for a good half an hour on Monday.
10 Members of Parliament (MPs) wanted to know the cause of the floods, and what the government was doing to prevent a repeat. "In one month, there are three floods in Orchard Road and other parts of Singapore. Do you think that this could have been prevented and why do you think so," questioned Lee Bee Wah, MP for Ang Mo Kio GRC. "If these areas identified are the same as those identified in previous years... then why is the drainage of those existing flood-prone areas not rectified in the first placed," asked Penny Low, MP for Pasir Ris-Punggol GRC.
In reply to the parliamentary questions, the Minister for the Environment and Water Resources, Dr Yaacob Ibrahim said there are plans to implement drainage improvements to several major canals and drains. Dr Yaacob said the tender for improvement to Geylang River closed in June. Tenders for improvements to Bukit Timah First Diversion Canal and the downstream stretch of Rochor Canal1 will be called in the next three months. Tenders for the upgrading of major drains along Thomson Road and MacPherson Road will be also called by the end of the year. Works to improve the drainage system in the flood-prone areas of Little India will start in the next few months.
Dr Yaacob said wherever possible, PUB will bring forward the start of these works and expedite their completion. Dr Yaacob Ibrahim also said Orchard Road, which flooded just last Saturday, is a new hotspot. He said an urgent review of the Stamford Canal is being undertaken. "We need to review the design of Stamford Canal and its adequacy altogether. I think the last July 17 storm caused us to be very concerned that this a major canal - diverting water all the way to the sea - is flooded. We need to take a serious view of what needs to be done," said Dr Yaacob.
Dr Yaacob said the incidence of flash floods is a challenge faced by cities around the world. Recently, devastating floods in France, China and Japan inflicted significant damage and loss of lives. As an island in the tropics, Singapore is especially prone to intense rain storms. He said Singapore has seen the occurrence of three intense rainfall events over the past month, caused by Sumatra squalls and the influence of Typhoon Conson, and aggravated by the prevailing La Nina conditions. Dr Yaacob said climate change could add a new level of complexity to this. He said he empathised with the frustration and anxiety of those affected by the recent floods. Dr Yaacob said PUB officers will continue to hold dialogues with affected residents and businesses and advise on possible improvement measures that they can take. He said improvements will also be made to the alert system to provide early warning of possible floods to the public. PUB will also be increasing the number of water level sensors installed in canals from 32 to 150 by next year. Currently, when sensors installed in canals are activated by rising water levels, an SMS alert is sent to warn businesses in the vicinity.
Dr Yaacob said his ministry is studying if this system can be extended to members of public in low-lying areas, so that they too will have sufficient time to respond to a possible flood. The minister said although it might not be realistic to expect Singapore to be completely flood-free, his ministry will work with the relevant agencies to carry out a systematic review of all major drainage systems and their design parameters, as a priority. The review is expected to take several months, and all possible interventions will be considered within the constraints of cost effectiveness and competing uses for limited land in Singapore.
The government has invested some S$2 billion to upgrade Singapore's drainage infrastructure in the last 30 years. As a result, flood-prone areas have been reduced from 3,200 hectares in the 1970s to a total of 66 hectares today. - CNA/vm/ls
Tuesday 20 July 2010
Tuesday 6 July 2010
SIWW (28 Jun - 2 Jul)
As part of work, I was fortunate this year to have some time to attend some of the events at the Singapore International Water Week 2010, after all my official duties are over. Much has been publicized on the news and net about this event, but I would just like to say that it is a very good opportunity to meet professionals, experts and friends involved in water, and to learn more about the world of water...;)
Indeed, attending the water convention was an eye opener. I didn't know that Hong Kong had a deep tunnel sewerage system since 2001 at depths of 150m, using an inverted siphon method to convey used water. This is different from what Singapore uses.
Events like the SIWW allows us the chance to learn and interact more indeed.
Indeed, attending the water convention was an eye opener. I didn't know that Hong Kong had a deep tunnel sewerage system since 2001 at depths of 150m, using an inverted siphon method to convey used water. This is different from what Singapore uses.
Events like the SIWW allows us the chance to learn and interact more indeed.
Tuesday 8 June 2010
Water Pricing I (08 Jun 2010)
Since the beginning of the year, I have mulling on this topic of water pricing. Water services is not free. The supply of treated clean safe water cannot be free, as there is a cost to all aspect of the process, from sourcing (be it groundwater, river water, reservoir), storage of raw water, treatment, distribution and finally collection and treating the used water for discharge such that there is minimal impact on the environment. The cost have to be borne, in addition to maintaining and upgrading/building the water systems.
I am not a financial scientists, but water pricing is a critical part of water management. A water utility cannot supply water to the customers sustainably unless there is proper financial management, which means that there is a need to collect tariff as well as manage the cost of delivering the water services.
Water tariff is part of water pricing, and is what water utilities collect for water services. There is advantage in the economies of scale, as implementing water services is expensive, a cost which needs to be shared by all customers. But what is the right price, which is fair to all stakeholders involved? I will blog more in the next few blogs as the ideas come in... :)
I am not a financial scientists, but water pricing is a critical part of water management. A water utility cannot supply water to the customers sustainably unless there is proper financial management, which means that there is a need to collect tariff as well as manage the cost of delivering the water services.
Water tariff is part of water pricing, and is what water utilities collect for water services. There is advantage in the economies of scale, as implementing water services is expensive, a cost which needs to be shared by all customers. But what is the right price, which is fair to all stakeholders involved? I will blog more in the next few blogs as the ideas come in... :)
Tuesday 9 March 2010
thought on resources
Singapore is now going through a long dry spell. There is not enough rain. The punggol and Serrangoon reservoir scheme, where 2 of the rivers are now closed off is completed, increasing the catchment areas in Singapore to 1/2 the land area. However, it depends on when the rain will fall.
What's funny is that other places like Australia and Europe are experiencing floods and heavy rainfalls. Earthquakes in places like Chile,turkey, China and many others. Philippines declaring a state of emergency due to droughts causing their hydoelectric dams to be at low levels cutting off electricity. All this is due to the El nino effect.....
Well, I can only say that our nature is a dynamic systems of cause and effects and that our water sources are unevenly distributed around the world. Our water management have to take this principle into account and adapt accordingly, just like nature does
What's funny is that other places like Australia and Europe are experiencing floods and heavy rainfalls. Earthquakes in places like Chile,turkey, China and many others. Philippines declaring a state of emergency due to droughts causing their hydoelectric dams to be at low levels cutting off electricity. All this is due to the El nino effect.....
Well, I can only say that our nature is a dynamic systems of cause and effects and that our water sources are unevenly distributed around the world. Our water management have to take this principle into account and adapt accordingly, just like nature does
Tuesday 2 March 2010
Water policy & Governance?
I have been trying to understand what it means by the various terms like water policies, water governance, water managements. A quick search on definitions:
"Those actions governing the management, administration, and procedures used to implement and direct a formal Water Planning process by which water rights, water uses, and water diversions are evaluated, ranked, and allocated on the basis of specific public policy goals and objectives and designated, either by legislative mandate, regulation, or fiat, Preferred Uses" - (http://dictionary.babylon.com/WATER_POLICY)
"Public policy can be generally defined as a system of laws, regulatory measures, courses of action, and funding priorities concerning a given topic promulgated by a governmental entity or its representatives." - Dean G. Kilpatrick (http://www.musc.edu/vawprevention/policy/definition.shtml)
"Water management is the activity of planning, developing, distributing and optimum use of water resources under defined water polices and regulations." - (http://en.wikipedia.org/wiki/Water_management)
So in effect, all those terms used in water policies and governance is really just implementation of a pre-set/ planned course of action to manage how water is sourced, treated to a pre-determined quality for a specific purpose, distributed, used, and retreated for discharge back into the environment or for reuse. The key then is to understand how and what kind of a set course of actions is required for each situation, say, from a large cities to rural communities.To understand that depends on the local conditions. However, I think the principle of sustainable water services is the same.We can look at how the different communities are managing their water services, learn from it, tweak it, but also there are pretty basic common sense principles which can be put in place. Some say that our water services in some parts of the world have failed, are failing, will fail in the future, or there was nothing in place at all, then there is a need to apply a more innovative, not run-of-the-mill approach to sustainable water services.
Ultimately, all the population want is to have drinking water of suitable quality available anytime, everytime, and the waste disposed of easily and conveniently.
"Those actions governing the management, administration, and procedures used to implement and direct a formal Water Planning process by which water rights, water uses, and water diversions are evaluated, ranked, and allocated on the basis of specific public policy goals and objectives and designated, either by legislative mandate, regulation, or fiat, Preferred Uses" - (http://dictionary.babylon.com/WATER_POLICY)
"Public policy can be generally defined as a system of laws, regulatory measures, courses of action, and funding priorities concerning a given topic promulgated by a governmental entity or its representatives." - Dean G. Kilpatrick (http://www.musc.edu/vawprevention/policy/definition.shtml)
"Water management is the activity of planning, developing, distributing and optimum use of water resources under defined water polices and regulations." - (http://en.wikipedia.org/wiki/Water_management)
So in effect, all those terms used in water policies and governance is really just implementation of a pre-set/ planned course of action to manage how water is sourced, treated to a pre-determined quality for a specific purpose, distributed, used, and retreated for discharge back into the environment or for reuse. The key then is to understand how and what kind of a set course of actions is required for each situation, say, from a large cities to rural communities.To understand that depends on the local conditions. However, I think the principle of sustainable water services is the same.We can look at how the different communities are managing their water services, learn from it, tweak it, but also there are pretty basic common sense principles which can be put in place. Some say that our water services in some parts of the world have failed, are failing, will fail in the future, or there was nothing in place at all, then there is a need to apply a more innovative, not run-of-the-mill approach to sustainable water services.
Ultimately, all the population want is to have drinking water of suitable quality available anytime, everytime, and the waste disposed of easily and conveniently.
Friday 22 January 2010
1st post (22 Jan 2010)
Welcome to my new blog.... ;)
It has been more than 1 yr since I graduated from my Masters course. This blog is to share and talk about various water, environment and public health issues. I may not know much, but I will try my best to find out.
Water and environmental issues affect all of us because we are part of the environment. Noone can survive without water for more than a week. As such, how we interact and handle the environment have a huge impact on the quality of out lives. Everyone would be better off understanding and taking action to sustain and improve the environment.
Writing about the issues will help me clear my thoughts and critically think about the various issues involved.
It has been more than 1 yr since I graduated from my Masters course. This blog is to share and talk about various water, environment and public health issues. I may not know much, but I will try my best to find out.
Water and environmental issues affect all of us because we are part of the environment. Noone can survive without water for more than a week. As such, how we interact and handle the environment have a huge impact on the quality of out lives. Everyone would be better off understanding and taking action to sustain and improve the environment.
Writing about the issues will help me clear my thoughts and critically think about the various issues involved.
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