Saturday, December 31, 2011

20120101 Fundamental Resolutions to Singapore Floods

Referring to so frequently repeating flood 20111223 Orchard Road Flood Again - Media Report & PUB Findings

Singapore frequent floods can be fundamentally resolved.

Our flood is due to downstreams ponding, not due to
1. Immense water cathment upstreams, like Kuala Lumpur (Conventive Effect from Immense cathment Upstreams) , better
2. No intensification by Orograhpic effect in Thailand (Orographic effect from immense cloud up North blocked by Northern mountains tapering off Mount Everest)

PUB using the right word, "Ponding."
Ponding means water stayed stagnated as a pond, not flowing.
Therefore the solution is quite clearly implied, we must make the water flow, we must therefore break this stagnation.

There are two level of "Ponding"
Micro-scopic - Choked filter, drains.
When there are too many filters, drains than necessary, they are too costly, if not impossible to clean frequent enough. The retired Chief Engineer of Munciple New Delhi educated me  " Covering of drains has many operation hazards. Regular inspection & maintainenance become difficult"

Macro-scopic -
1. Excessive deep drains upstreams, resulting in no gradient even at mid streams Gradient is the fundamental requirement for water to flow. "人往高出,水向低流" (following blogs provide more details).
2. High water level down streams, easily adjusted by barraged Marina Bay (Marina Bay water is not yet ready for treatment for drinking, therefore there is incentive to expedite the discharge of water. But how to discharge the saltier and keep the fresher one, easy solutions will be provided. Inventor learnt from EDB founders on how they face the challenge when they barrage up Jurong River, where fresh water flow away from the top, while saltier are retained at the bottom, he did not find easy solutions then.)

Raising orchard road will they break this stangation?
A one month ahead warning was given on 20110505 prior to 20110605 floods.
The potential impact were then listed including leakage to basement and underground infrastructure, MRT included.
20110505 Multi-billion Dysfunctional Waterway - Reasons & Solutions

Therefore proposed new barriers, revising building codes will they solve the problem?

In Engineering, there is no perfect solution, as we can always improve on even the best solutions, even assuming situation does not change.

However, there are
1. Costly Solutions - cover the drains, adding construction, maintenance cost.
2. Ineffective solutions - enlarge drains without increasing gradient
3. Worsening solutions - deepen drains by sacrificing gradient, therefore slow flow down, silting and choking of drains resulting. 
4. Complicating solutions - raising road level that move flood upstreams.

Solutions have been prescriebed below and i thank Dr Vivian for he has keep this inventor encouraged that he has held discussion with PUB leaders, on the importance of speedying up the flow.

Speedying up flow, compare to the year long raising orchard road and building motorized barriers, 
1. The most expedient, as it address the root cause
2. Least costly (land, labor and construction upfront, inspection and maintenance in future).

It must be done, even Bukit Timah, Newton, Kampong Java can be resolved. This is after studying 1880 Singapore maps.

Immediately the solution, is to lower the Marina Bay water level to lower than the ten years lowest tide.
So that we have enough time to activate the pumps, if the heavy storm sustain longer than half hours.

May i clearly stated:
1. Installing sensors
2. Modeling water flow without speeding the flow
3. Raising road level like Orchard Road
4. Building barriers like Wheellock place

No matter how much, how fast, how high tech they are, they are irrelevant.
Irrelevant solutions are not changing the root cause of the problem - water stagnation, succintly as PUB put it "Water Ponding"

20110920 SASC1 -  Waterway Design for Global Warming 

20110920 SASC2 Singapore Unique Advantage
20110920 SASC3 What Impede Flow - Over-sized Excessive Depth 

20111223 Orchard Road Flood Again - Media Report & PUB Findings

PUB releases latest findings on Orchard flash floods

Friday, Dec 30, 2011
Findings from investigations of Orchard flash floods show that water could not flow out into Stamford Canal as it was full, said national water agency PUB in a statement today.

Rainwater that drained off from the roof and the back area of Liat Towers overflowed into the basement area from an internal drain as water could not flow out into the canal when it was full.

These were among the findings by PUB with regard to flash floods in the Orchard area on Dec 23, resulting in ankle-deep water in the basement shops of Liat Towers and Lucky Plaza.

Countermeasures fail to stop flooding at Liat Towers
Flash floods hit Liat Towers and other parts of Orchard Road

PUB said that the pumping system at Liat Towers was able to pump out the water from the open basement area when the canal is not full.

When the canal in front of Liat Towers reached full capacity, the pumps were not able to discharge water that had accumulated in the basement into the canal. However, the pumps were still able to divert water onto the pedestrian walkway.

The agency said it is working with the management of Liat Towers to build a perimeter wall along their internal drain to prevent water from flowing into the basement.

As for Lucky Plaza, the management and relevant authorities are in the process of implementing flood barriers.

Prolonged and heavy rain caused the flash floods at the Orchard Road area last Friday afternoon. A total of 152.8mm of rain fell, equivalent to about half the average monthly total of rain recorded for the entire December and over the last 142 years.

No floods in Orchard Rd, just 'ponding': PUB
by Ng Jing Yng 04:46 AM Dec 24, 2011

Singapore - As heavy rain pelted down on Orchard Road yesterday, Liat Towers activated its S$200,000 flood barrier system. As an added measure, plastic barriers were also distributed. But they proved no match for the floodwaters, as levels reached knee height and poured into the basement-level shops - reminiscent of the scene in June last year when floodwaters last hit the building. Yesterday, some customers even had to form a chain of chairs to get out from one of the affected stores.

Prolonged heavy rain which fell over a three-hour period over the southern and central parts of Singapore resulted in flash floods at numerous areas. Cuscaden Road, Newton Circus, Kampong Java, Lincoln Road, Wee Nam Road, Cambridge Road, the junction of Moulmein and Thomson roads in front of United Square, and the junction of Bukit Timah Road and Sixth Avenue were affected.

Flood waters reached a height of 30cm in some areas and generally subsided within an hour, except at Cambridge Road, Newton Circus and the Moulmein-Thomson junction in front of United Square, where waters subsided by 6pm, said national water agency PUB. "The affected areas are mainly low-lying areas," it added.

While the total recorded rainfall at Orchard Road was 152.8mm, PUB said "there was no flooding at Orchard Road". "However, water ponded at the open area of Liat Towers, the underpass between Lucky Plaza and Ngee Ann City, and the basement of Lucky Plaza due to the sustained heavy downpour," it added.

The underpass between Lucky Plaza and Ngee Ann City remained closed yesterday evening. Some shop owners at the ground floor of Lucky Plaza said that water levels were ankle-high, but the situation this time was better than during previous floods.

At retail store Giordano, store in-charge Lyn Molino estimated losses of up to S$7,000 and said that customers were not only deterred by the wet floors but also by the stench from yesterday's floodwaters. "This is supposed to be a good opportunity for us to have extra earnings but it has all been affected," she said.

The floodwaters also washed out business at Starbucks and fast-food restaurant Wendy's, among other establishments, at Liat Towers. Wendy's manager (marketing and branding) Seng Woon Fa estimated losses of about 60 per cent of the day's earnings. "We are now just busy cleaning up and hope to resume business as soon as possible ... we are still checking if any equipment is spoiled," he said.

Earlier yesterday, before the rain fell, PUB said drains would be widened in some areas next year. Eight of the 10 projects will commence in the first quarter, of which five of will involve expanding roadside drains at flood-prone areas, including parts of Chinatown, roads near Bencoolen Street as well as Arab Street and Rochor Canal Road.

The PUB will also improve drainage in three other non-flood-prone areas: Roads will be raised at Jalan Dusun, Jalan Datoh and Jalan Raja Udang. And drains will be expanded at Shanghai Road, Wee Nam Road, Outram Road and Tiong Bahru Road.

Yesterday, up to eight gates at Marina Barrage were opened to maintain the water level at Marina Reservoir within the normal range. PUB advised the public to exercise caution as flash floods could occur in the event of heavy storms. The public can also call the PUB 24-hour Call Centre at 1800-284-6600 or go to PUB's Facebook page or on its iPhone app, iPUBOne, to report flash floods or to check on the flood situation.

The public can also get updates on water level information in key canals/drains at PUB's Facebook page, its Twitter account,, or website,

Saturday, December 17, 2011

20111203 Structure, Design and Managment Caution: MRT

From: Sweekeng
Sent: Saturday, 3 December 2011 7:39 PM
To:  Lim Bok Niam;  Chew Hock Yong; 'Tuck Yew LUI
Subject: 20111203 Structure, Design and Managment Caustion: MRT

Dear Minister
Dear Hock Yong, Bok Ngam

I cc PM, two DPM (Finance and Home Affair Ministers) engineering, money and rescue effort must be in placed.

I cc Vivian for good effort, seemingly there is no flood reported despite intense rain in recent one week as alerted twenty one days before this bout of days long rains. (it is best time to work with weather department and LTA, Traffic Police, Transport operators to see where we did right, where are next likely improvement, bottleneck)

I am most ready to assist, do not invest in another team of same domain world experts who are yet to master how to accelerate river flow on a small island.
Let this be an opportunities we learn and progress together, let Singapore be an ever learning, progressing nation.




Recently I noticed there are green light on the station head, aligned with where the train heading stopped.
There is a green light when cleared to move.
However, the control panel, the cable harness are of casual design, they can be penetrated easily.
On one occasion, the driver has to stop, alight the train, move out to close the control panel box(which was ajar), before green light is on, he can move on.


I noticed on more than 5 occasion, the train station is different from what is announced, or displayed on the LED panel in the train.
Car 1068 heading from Sembaway to Jurong East at 1607hours today, 2011 12 03
Display and Read Yew Tee as next station, immediately after leaving Yew Tee.
This error repeated till Jurong East Station, one station late.

This is dangerous.
One of these misinformation may cause the disruption of train services, worse collision of trains, worst case scenario – piling up of many trains.

Please advise action taking….

I am most ready to assist, do not invest in another team of same domain world experts who are yet to master how to accelerate river flow on a small island.
Let this be an opportunities we learn and progress together, let Singapore be an ever learning, progressing nation.

Solvere Lim Swee Keng
Engineer, Inventor, Philosopher

CtS Cognoscere Tenuse Solvere
Cognize before Happening
Solving at Motivation Forces

CtS helps governments and business leaders build a better tomorrow by discovering early the root causes of major changes, and providing practical solutions based on science, technology and diverse cultural values.

By rallying the forces of nature and inspiring the insatiable nature of man to work constructively, we can achieve endless and peaceful progress.
CtS is not biased to any political belief. Instead, it applies wisdom from diverse cultures and religions.

10 days latter, for a few days,

  1. Both operators of Singapore MRT failed,
  2. Including third rail(power rail) misaligned, 
  3. Network signal failures. 20111215 Business Time Carine Lee - How can signal no impact on safety, then what are these signal for?
  4. During breakdown, doors open and close abruptly. 20111217 晚报 P3,4574,469929,00.html

December 15, 2011, 6.57 pm (Singapore time)
Network problem on Circle Line has no impact on safety: SMRT


SMRT on Thursday assured commuters that the communication network problem on its Circle Line has no impact on its system safety.
The communication network problem caused a service disruption on the Circle Line between Marymount and one-north MRT stations at Wednesday morning peak hour. The problem has yet to be resolved.
To commence service and maintain the scheduled train timetable on Thursday, SMRT deployed staff to man all Circle Line trains. SMRT said it will continue to do so until the fault is resolved.