There is no flooding in SG, only ponding and draining

[LITTLEREDDOT]

Not flooding but draining: Bishan-Ang Mo Kio Park functioning as planned amid high water levels

In the event of a storm, the park area doubles up as a conveyance channel, carrying the rainwater downstream gradually.
ST PHOTO: SHINTARO TAY

The park is functioning exactly as intended - with a canal that channels rainwater downstream.

A stream running through the park is part of the Kallang River, but is also a naturalised canal designed to accommodate "fluctuating water levels"

Ng Wei Kai

PUBLISHED 2 JAN 2021


SINGAPORE - Photos of high water levels in the Bishan-Ang Mo Kio Park have caused some netizens to assume it is flooded, but the park is functioning exactly as intended - with a canal that channels rainwater downstream.

The spike in the water levels comes from torrential rain over the past few days, but this is part of the normal functioning of the park's waterway. A stream running through the park is part of the Kallang River, but is also a naturalised canal designed to accommodate "fluctuating water levels" which may rise as high as 3m.

According to information on the National Parks Board (NParks) website, there are safety features visible in the park to ensure that members of the public are aware of impending high water levels.

"A river monitoring system with water level sensors is in place to provide early warning in the event of impending heavy rain or rising water levels. Warning signs, red makers, life buoys and CCTVs have also been put up along the river," says the website.

The redevelopment of the waterway from 2009 to 2012 was a joint collaboration between national water agency PUB and NParks under the Active, Beautiful, Clean (ABC) Waters Programme.

According to the PUB website, the river channel was designed based on a floodplain concept and is linked to a network of drains in the city. A floodplain is an area of land adjacent to a stream or a river which fills with water during periods of high discharge.

During dry weather, the flow of water is confined to a narrow stream in the middle of the river.

In the event of a storm, the adjacent park area doubles up as a conveyance channel, carrying the rainwater downstream gradually.

The naturalisation of the Kallang River serves both functional and aesthetic purposes.


"Under the ABC Waters Programme, a combination of plants, natural materials such as rocks, and civil engineering techniques were introduced to soften the edges of the waterway, give it a natural appearance and prevent soil erosion," says the PUB website.

 

[millim6868]

One clown or a few clowns say once every 50 years, i am tgink why 61% agree to pay them so high n talk cock not kniwing wat happening n solving it, like CCS talk cock

 

[laksaboy]

Man-made stuff is always a disappointment compared to Nature's gifts.

Bishan-AMK Park aerial view, before and after.

 

[mojito]

Flood plain concept u peasant under stand? This is what we call the Nile.

 

[kaninabuchaojibye]

Not flooding but draining: Bishan-Ang Mo Kio Park functioning as planned amid high water levels

In the event of a storm, the park area doubles up as a conveyance channel, carrying the rainwater downstream gradually.
ST PHOTO: SHINTARO TAY

View attachment 100199
The park is functioning exactly as intended - with a canal that channels rainwater downstream.

View attachment 100200
A stream running through the park is part of the Kallang River, but is also a naturalised canal designed to accommodate "fluctuating water levels"

Ng Wei Kai

PUBLISHED 2 JAN 2021


SINGAPORE - Photos of high water levels in the Bishan-Ang Mo Kio Park have caused some netizens to assume it is flooded, but the park is functioning exactly as intended - with a canal that channels rainwater downstream.

The spike in the water levels comes from torrential rain over the past few days, but this is part of the normal functioning of the park's waterway. A stream running through the park is part of the Kallang River, but is also a naturalised canal designed to accommodate "fluctuating water levels" which may rise as high as 3m.

According to information on the National Parks Board (NParks) website, there are safety features visible in the park to ensure that members of the public are aware of impending high water levels.

"A river monitoring system with water level sensors is in place to provide early warning in the event of impending heavy rain or rising water levels. Warning signs, red makers, life buoys and CCTVs have also been put up along the river," says the website.

The redevelopment of the waterway from 2009 to 2012 was a joint collaboration between national water agency PUB and NParks under the Active, Beautiful, Clean (ABC) Waters Programme.

According to the PUB website, the river channel was designed based on a floodplain concept and is linked to a network of drains in the city. A floodplain is an area of land adjacent to a stream or a river which fills with water during periods of high discharge.

During dry weather, the flow of water is confined to a narrow stream in the middle of the river.

In the event of a storm, the adjacent park area doubles up as a conveyance channel, carrying the rainwater downstream gradually.

The naturalisation of the Kallang River serves both functional and aesthetic purposes.


"Under the ABC Waters Programme, a combination of plants, natural materials such as rocks, and civil engineering techniques were introduced to soften the edges of the waterway, give it a natural appearance and prevent soil erosion," says the PUB website.

seoul also have one of such park design...

 

[eatshitndie]

seoul also have one of such park design...

i live next to a golf course, and 6.9 holes of golf links near a creek are intended and designed to be an “overflow” catchment zone if water in the creek crested over its banks. this seldom happens as it’s dry most of the year. but if there’s heavy rain over 6.9 days straight and or an intentional release of water up-creek at a mountain lake/reservoir, the water will gush down the creek and drain into low lying areas with overflow and catchment areas downstream to absorb the surge. the creek runs a long way to the bay and thus cannot drain the sudden surge of water within 6.9 days. great concept and it works. but if it rains heavily and continuously for 69 days or dam at reservoir breaks, which has never happened, it’s anyone’s guess.

 

[Hypocrite-The]

have to give credit when credit is due,,,if it works and the residential areas and roads and ppls houses not flooded,,it is good,,compared to mudland,,singkieland is better managed

 

[eatshitndie]

have to give credit when credit is due,,,if it works and the residential areas and roads and ppls houses not flooded,,it is good,,compared to mudland,,singkieland is better managed

agree. must give credit to amdk who designed and built it. sinkies only think of canals and tua longkang made of concrete but amdks think differently. they incorporate nature and terrain into the solution, providing habitat for birds and wild animals while giving residents a nature-like environment. it’s a park on dry months and pond on wet weeks. good riddance to the ugly old concrete canal that stood there before.

 

[Hypocrite-The]

agree. must give credit to amdk who designed and built it. sinkies only think of canals and tua longkang made of concrete but amdks think differently. they incorporate nature and terrain into the solution, providing habitat for birds and wild animals while giving residents a nature-like environment. it’s a park on dry months and pond on wet weeks. good riddance to the ugly old concrete canal that stood there before.

At that time when the concrete canals were built..there was limited knowledge on naturalised canals.. now singkieland is improving despite pinky. Contrast that to mudland..still 3rd world in infrastructure

 

[Leongsam]

Singapore civil engineers are the best! They designed this hill to give way in the event of a heavy rainstorm in order to protect other more vulnerable areas.

 

[eatshitndie]

At that time when the concrete canals were built..there was limited knowledge on naturalised canals.. now singkieland is improving despite pinky. Contrast that to mudland..still 3rd world in infrastructure

sg still has clay, m&d, soft soil, sediment in much of the island. without concrete or rock retaining walls, these soils will contribute to sludge, mudslides, caking in the drainage system. at that time, to clean up the rivers and drainage system, it was best to concretize the longkangs and canals to remove sediment first before removing waste. even with park-size overflows, the sludge and m&d will not disappear unless they are built with boulders, rocks and concrete underneath the facade. sg is too small and space-constraint for large natural overflow basins.

 

[eatshitndie]

Singapore civil engineers are the best! They designed this hill to give way in the event of a heavy rainstorm in order to protect other more vulnerable areas.

chocolate pudding factory produces too much pudding.

 

[tobelightlight]

have to give credit when credit is due,,,if it works and the residential areas and roads and ppls houses not flooded,,it is good,,compared to mudland,,singkieland is better managed

Hopefully, this concept can be applied in Malaysia too if it is suitable for their environment. We love our neighbours and will help them if they met any problems.

 

[kaninabuchaojibye]

How the Cheonggyecheon River Urban Design Restored the Green Heart of Seoul
ARCHITECTURE

Seoul's Lessons for Asian Urban Flooding
www.asiasentinel.com
A year ago, heavy summer rains wrought havoc on Seoul, triggering political implications that continue to play out in South Korea's capital city. Due in part to the city's mountainous terrain, 69 people died in landslides and floods, homes were ruined, the subway was paralyzed. There were concerns that landmines left over from the Korean War could surface and cause accidents.
In the aftermath, Seoul's citizenry chastised the city's government for not having done more to prepare. Seoul's mayor at the time was Oh Se-hoon, who came under particular fire for having chosen to direct the city’s resources towards what were considered unnecessary prestige projects like remodeling Seoul as a ‘World Design Capital’ and improving the parks along the Han River (which, it should be mentioned, are far nicer and more popular now than they were a few years ago).
Seoul is hardly alone. Just how much urban flooding has become a regular occurrence across the region was detailed in a 638-page report by the World Bank released in February, describing the problem as a “global phenomenon which causes widespread devastation, economic damage and loss of human lives.” Heavy summer rains in cities including Beijing and Manila this year have caused severe flooding that led to loss of lives and extensive damage. There is no lack of money in either of those places, but for whatever reason it hasn’t been used to develop effective drainage systems to deal with the heavy rains that come annually.
Unlike most other Asian cities, Seoul has chosen to do something about it. The city’s response to the floods should be a lesson not only to Beijing and Manila, but to Bangkok and Indonesia as well, which have suffered perennial flooding for decades.
Immediately in the aftermath of the 2011 flooding crisis, Oh said he would make improvements to Seoul’s drainage system and response capacity, but he didn’t last long enough to enact them. He staked his political future on a referendum in October, which his side lost. He then made good on a pledge and stepped down. An election was soon held and he was replaced by Park Won-soon, a liberal civic group leader.
Park treated improving the city’s flood infrastructure as an important part of his mandate as mayor. “Sixty-nine people died in Seoul. We were shocked so we decided we needed measures to prevent it from happening again,” Park told Asia Sentinel in an interview at his Seoul office.
“We needed a natural disaster governance system. City officials can’t do everything on their own, they need input from residents, experts. We have provided a link between city officials and the residents of flood-prone areas so that they can interact and find ways to solve this problem together.”
In 2011, Seoul’s budget for dealing with summer rains was a modest KRW360 million (US$318,670). After the events of last summer, it was bumped up to 580 million. Mayor Park plans to have the budget rise all the way to 5 trillion by 2021.
There was opposition to this from both sides of the political spectrum, as conservatives called Park’s plans too expensive and environmentalist groups argued against digging new tunnels and building new reservoirs.
Park has devised and implemented comprehensive improvements to Seoul’s drainage infrastructure. He established a task force that would respond to citizen requests (made on a specialized flood hotline) by going out and assessing areas that residents identified as vulnerable to flooding or landslides. Throughout the spring and winter, Seoul city government planned and implemented a series of measures, some basic, some specific to what could be the world’s most wired city.
As South Korea boomed in the 1970s and 1980s, Seoul was built quickly and is now home to far more people than it was probably designed to accommodate. The speed at which the city was built led to some slapdash construction of pipes, so basic improvements to drainage were the first order. Pipes all around Gwanghwamun Square, Seoul’s symbolic epicenter, were reconstructed to fix leaks and improve drainage. An underground tunnel was built to connect the square with the Han River.
Also, Seoul is a concrete mass with only minimal tree cover, meaning very little rainwater is absorbed into the ground. “The problem is permeability. Most of the rainwater doesn’t permeate the ground when it falls,” said Park.
In addition,, since Seoul is surrounded by mountains, there is widespread risk of landslides. Thirty-four particularly dangerous areas were designated by the taskforce.
Mayor Park thought it essential that Seoul residents have a forum to communicate with city officials and share information among themselves. “We developed an online system so that residents can report online by uploading photos and share information that way.”
Park recognizes that this only possible in a city like Seoul where residents have access to technology and are savvy about using it. “Our community mapping system was only possible because Korea is such connected country where so many citizens have smartphones.” Still he hopes that other cities will benchmark Seoul’s measures and use them to improve. “I believe that this will become a worldwide model,” Park said.
The big question is, whether this is a result of global climate change, or is it just a change of conditions in one city.
“It can be somewhat attributed to global warming because we are seeing repeated instances of heavy rain, we’re seeing temperatures rising, we’re seeing difficulties in agriculture," Park said. “So part of this is global warming, but there are still roles that we can play as a local government by continually discussing ways that we can improve this situation.”
This year in Seoul the summer rains have been lighter, but no serious damage or deaths have been reported. While it’s impossible to say with certainty, the city’s measures appear to have worked.

 

[realDonaldTrump]

After this weekend's raining MCE tunnel waterproofing also failed. Saw leaks when I drove pass.

 

[laksaboy]

After this weekend's raining MCE tunnel waterproofing also failed. Saw leaks when I drove pass.

MCE - massive engineering feat.

 

[syed putra]

Hopefully, this concept can be applied in Malaysia too if it is suitable for their environment. We love our neighbours and will help them if they met any problems.

N9 need. Just get them t9 build houses on stilts like in the old days.cheaper and less damaging to environment.

 

[LITTLEREDDOT]

Part of park connector near Clementi BTO site closed after landslide​

1 of 8

The site has now been cordoned off for public safety. ST PHOTO: JOYCE FANG

Shermaine Ang and Yong Li Xuan

SEP 2, 2022, 9:51 PM SGT


SINGAPORE - A section of the park connector in Clementi near an almost completed Housing Board Build-To-Order (BTO) project has been closed after soil spilt into the nearby canal on Friday morning.
According to the MP for the area Sim Ann, a landslide near the Clementi NorthArc construction site in Clementi Avenue 6 in the early hours of the morning caused damage to the Ulu Pandan Park Connector and soil displacement into the Ulu Pandan Canal.
She said the site has been cordoned off for public safety and asked residents to stay clear of the area for now.
One passer-by sustained minor injuries and was attended to at the site, said HDB in a statement on Facebook. It added that the injured man is now resting at home. No other injuries were reported.
The affected areas of the park connector have been cordoned off and the public should stay away from the area, HDB added.
“HDB is working with the National Parks Board (NParks), PUB and the Building and Construction Authority to conduct a thorough investigation of the incident and carry out the necessary recovery actions,” it said. “As part of our safety process and precautionary measures, we have checked the nearby completed but yet to be occupied blocks and confirmed that they remain structurally sound.”

Cyclist Baven Chin, who travels on the section of the affected park connector twice a week from Ghim Moh to Pandan Road, said that the landslide can cause flooding in the area now that soil and m&d have spilt into the canal.

“The rain is going to come. I don’t know what is going to happen. It is probably going to flood this area or there is going to be heavy washing away (of soil),” said the 53-year-old management consultant.
Addressing concerns over potential flooding if the canal is choked, PUB said on Facebook at about 1pm that water can still flow in Sungei Ulu Pandan and HDB is working on removing earth inside the canal. Water quality in the nearby Pandan Reservoir is not affected.
It added: “PUB is monitoring the situation and has deployed our quick response team vehicles at locations upstream of the canal. They are on standby to respond to any potential flooding incidents in the event of heavy rainfall.”
NParks has closed the Ulu Pandan Park Connector along both sides of the canal for slope repair works.

Mr Lim Thiam Chye, 56, a resident at Block 307, near the area affected by the landslide, said the street lamps in the area were not working at about 1am on Friday. He added that there are park connector users even at night. “There are people who cycle and run here at night.”
The landslide occurred near the Clementi NorthArc HDB project, which was launched in February 2017 with an estimated completion date in the second half of this year.

The before and after of the Ulu Pandan Canal. PHOTOS: SCREENGRAB FROM GOOGLE MAPS, SIM ANN/FACEBOOK
But the BTO project has been hit with delays - first till the third quarter of this year and again for up to six more months till March next year.
ST reported in April that buyers of Clementi NorthArc and two other BTO projects were frustrated at being informed late about the latest round of delays.

 

[LITTLEREDDOT]

Sections of Ulu Pandan Park Connector briefly closed after flash flood warning​

Remote video URL

Aqil Hamzah

SEP 18, 2022


SINGAPORE - Sections of the Ulu Pandan Park Connector in Ghim Moh were closed on Sunday morning after water levels in the Ulu Pandan Canal almost reached the level of the park connector.
Flash flood warnings issued by national water agency PUB at 9.50am said that the water level in the canal was at 90 per cent capacity.
Responding to queries from The Straits Times, NParks said it had closed sections of the park connector from Clementi Road to Commonwealth Avenue West near Ghim Moh Road at about 8am owing to the potential flood risks.
“These sections were reopened when the rain eased close to noon,” it said.

The PCN was closed to the public at around 8am, and reopened at around noon. ST PHOTO: GAVIN FOO

The PCN was closed to the public at around 8am, and reopened at around noon. ST PHOTO: GAVIN FOO
Separately, a statement on NParks’ website said: “NParks and PUB will closely monitor the water level and will close the park connector when necessary.”
The canal had a 3.5m-wide channel carved out of it on Sept 3, after soil was displaced into it following a landslide the previous day. ST understands that the channel has since been expanded and now spans 10m wide.
With Singapore forecast to experience rainy weather in the coming weeks, the channel would help to mitigate flood risks upstream by allowing water to flow through the canal.


Construction efforts to repair the damage caused by the landslide are estimated to take a few months, with a section of the park connector – stretching from Commonwealth Avenue West flyover to Clementi Road – remaining closed to the public.
Two weeks ago, the Housing Board said in an update that it would install sheet piles along the affected stretch of the park connector to reinforce and further stabilise the slope.
These works are projected to take at least a month, before main recovery and construction efforts can begin.
The recovery work includes removing the dislodged soil in the canal, reinstating the damaged part of the park connector, and reconstructing the slope and retaining walls within the site.

 

[LITTLEREDDOT]

Risk of flash floods in 13 areas from Wednesday morning downpour: PUB​

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Heavy rain in Bukit Panjang on the morning of Oct 5, 2022. ST PHOTO: NG SOR LUAN
Sarah Koh

Oct 5, 2022

SINGAPORE - Drains in 13 areas across the island reached 90 per cent capacity due to heavy rain on Wednesday morning, according to flash flood alerts by national water agency PUB.
Between 7am and 8am, the drains in places such as Telok Kurau, Siglap Canal, Cambridge Road, Aljunied Road, and Sims Avenue East were near full capacity.
PUB advised the public to avoid these areas for an hour due to the risk of flash flooding.
It said that heavy rain is expected over many parts of Singapore until 9.30am.
The Straits Times reported last week that wet weather is expected to continue through the first half of October, with thundery showers on most days, according to the bimonthly report by the Meteorological Service Singapore.
Showers will usually occur between the morning and early afternoon, with daily temperatures on most days expected to range between 24 and 33 deg C.
Rain may lower this to between 23 and 32 deg C on a few days.

In September, a landslide occurred at the Clementi NorthArc construction site in Clementi Avenue 6, causing damage to Ulu Pandan Park Connector and displacing soil into the Ulu Pandan Canal.
Minister for National Development Desmond Lee, in a written parliamentary response on Monday, said during periods of intense wet weather, local agencies may conduct inspections on slopes more frequently, such as on a weekly or monthly basis.
He added that while the cause of the landslide is still under investigation, such soil movements may be triggered by factors such as heavy and prolonged rainfall.
Mr Lee noted that an average of four landslide incidents were reported to the Building and Construction Authority per year between 2017 and 2019, and 21 each year in 2020 and 2021.
He said: "Higher-than-normal rainfall was recorded in 2020 and 2021, which could be one factor that contributed to the higher number of incidents in these two years."