Beneath the Surface. Understanding Urban Sinkholes in Malaysia

Infrastructure Failure, Hidden Water Movement, and the Need for Integrated Asset Management

I would like to express my sincere appreciation to my friends in the consulting industry including multi-agencies for their valuable contributions, as well as to the sponsors for their generous support, which enables me to continue producing quality articles for everyone to read and share.

1.0 INTRODUCTION

The recent viral incident involving a developing sinkhole in Wangsa Maju has once again raised public concern regarding the safety of urban infrastructure in Malaysia.

To the public, a sinkhole may appear to be an isolated road failure. To engineers, however, it is often the final visible symptom of a much larger and hidden underground process involving water movement, soil erosion, utility infrastructure, drainage systems, pavement structure, and maintenance coordination.

Most urban sinkholes do not occur overnight. They develop progressively beneath the surface, sometimes over months or years before the pavement finally collapses under traffic load.

The Wangsa Maju case serves as a reminder that modern cities are not merely built above ground. Beneath every urban road lies a complex network of:

• stormwater drains,

• sewer pipelines,

• water mains,

• electrical ducts,

• telecommunication utilities,

• soil layers,

• culverts,

• retaining systems,

• groundwater flow paths.

When one component fails, the consequences may propagate silently underground until a catastrophic collapse occurs.

2.0 HOW SINKHOLES FORM

Urban sinkholes are commonly caused by a phenomenon known as subsurface erosion or soil piping.

This occurs when flowing water gradually removes fine soil particles beneath the pavement, creating underground voids. Eventually, the road surface loses support and collapses.

Simplified Sinkhole Formation Process

It’s a fascinating and terrifying at the same time looking at how something as simple as a leaky pipe can essentially "hollow out" a city street from the inside out.

3.0 COMMON CAUSES

3.1 Drainage and Culvert Failure

Aging drainage systems may crack, leak, or collapse. Fast-moving water then erodes supporting soil beneath roads.

Potential contributors:

• broken culverts,

• failed drainage joints,

• scouring,

• blocked drainage systems,

• heavy stormwater concentration.

Agencies involved:

• Jabatan Pengairan dan Saliran Malaysia (JPS)

• Dewan Bandaraya Kuala Lumpur (Kuala Lumpur City Hall) (DBKL)

3.2 Burst or Leaking Water Pipes

Pressurized water mains can rapidly wash away soil beneath road structures.

Warning signs may include:

• unexplained wet pavement,

• reduced water pressure,

• recurring potholes,

• soil settlement.

Agencies involved:

• Air Selangor

3.3 Sewer Infrastructure Leakage

Leaking sewer systems can soften surrounding soil and create hidden voids.

Agencies involved:

• Indah Water Konsortium Sdn Bhd (IWK)

3.4 Poor Utility Reinstatement Works

After excavation works for cables or pipes, improper backfilling and compaction may leave weak underground zones.

Over time:

• rainfall infiltrates,

• soil weakens,

• settlement occurs,

• pavement collapses.

Possible stakeholders:

• utility contractors,

• local authorities,

• telecommunications companies,

• power infrastructure providers.

3.5 Geological and Geotechnical Conditions

Certain parts of Malaysia especially areas with limestone or former mining activity are naturally more vulnerable to subsurface instability.

Possible contributing factors:

• karst limestone,

• groundwater fluctuation,

• soft clay,

• abandoned underground cavities.

Agencies involved:

• Jabatan Mineral Dan Geosains Malaysia

4.0 SINKHOLES - A MULTI-AGENCY PROBLEMS

One major challenge in Malaysia is that underground infrastructure responsibilities are fragmented.

For example:

As a result:

• the road may belong to one agency,

• the drain to another,

• the leaking pipe to another,

• and the reinstatement contractor to someone else.

Yet the collapse appears at a single location.

This is why urban sinkholes should be viewed not merely as road defects, but as indicators of broader infrastructure coordination challenges.

Although the One Stop Centre (OSC) mechanism which brings together multiple agencies under a coordinated framework is generally a commendable practice often initiated by public authorities, there are still concerns regarding its overall effectiveness in certain cases. It has been observed that some OSC platforms do not consistently achieve full inter-agency participation and coordination, partly due to bureaucratic limitations, overlapping jurisdictions, and the tendency for responsibilities to be shifted between agencies rather than collectively resolved.

5.0 PROACTIVE DETECTION : MOVING FROM REACTIVE TO PREDICTIVE MAINTENANCE

Malaysia cannot rely solely on repairing sinkholes after collapse occurs. A more sustainable approach involves predictive infrastructure monitoring.

5.1 Recommendations

a. Ground Penetrating Radar (GPR)

GPR allows authorities to scan beneath roads and detect:

• underground voids,

• soil weakening,

• hidden cavities,

• subsurface water accumulation.

Example Conceptual GPR Scan

b. Smart Drainage Monitoring

Authorities should deploy:

• water flow sensors,

• pressure monitoring,

• soil moisture monitoring,

• underground vibration sensors.

This enables early detection before structural failure occurs.

c. Digital Underground Utility Mapping

Malaysia requires integrated underground infrastructure databases using:

• GIS,

• BIM,

• utility mapping systems,

• digital twin technology.

Poor utility coordination remains one of the largest urban risks.

5.2 Strict Utility Reinstatement Audits

All utility excavation works should undergo:

• compaction testing,

• density verification,

• post-reinstatement monitoring,

• independent engineering inspection.

Recurring potholes often indicate deeper subsurface problems.

6.0 INTEGRATED MULTI-AGENCY TASK FORCE

Future urban resilience requires:

• centralized coordination,

• shared infrastructure databases,

• unified emergency protocols,

• integrated maintenance planning.

7.0 CLIMATE CHANGE AND URBAN INFRASTRUCTURE STRESS

Climate change may worsen sinkhole risks due to:

• more intense rainfall,

• flash flooding,

• higher groundwater fluctuations,

• increased hydraulic pressure on drainage systems.

Urban infrastructure originally designed decades ago may no longer match present rainfall intensity.

This makes proactive infrastructure upgrading increasingly urgent.

8.0 CONCLUSION (for now)

The Wangsa Maju sinkhole incident should not be viewed merely as a viral road defect.

It is a warning sign of the growing complexity and vulnerability of modern urban infrastructure systems.

Beneath every city lies an invisible network carrying water, waste, utilities, and structural loads. When maintenance, coordination, monitoring, or planning fail beneath the surface, the consequences eventually emerge above ground.

The future of urban resilience in Malaysia will depend not only on repairing roads after collapse occurs but on how effectively authorities detect hidden failures before disaster strikes.

Because in many cases, the sinkhole itself is not the true problem. It is merely the symptom.

KEDAULATAN UNDANG-UNDANG

Sebagai seorang biasa, rakyat biasa, saya faham sedikit-sebanyak mengenai undang-undang kerana kerja dan urusan saya banyak melibatkan undang-undang.

Dalam apa jua situasi yang melibatkan dakwaan, pertikaian atau insiden yang sedang dinilai, semua pihak wajar kekal tenang, profesional dan menghormati proses perundangan yang sewajarnya.

Terdapat perbezaan yang jelas antara:

- pertikaian sivil,

- siasatan dalaman,

- dan siasatan jenayah.

Bukan setiap insiden yang malang secara automatik menjadi kesalahan jenayah, dan bukan setiap siasatan secara automatik membuktikan wujudnya kesalahan.

Pada masa yang sama, semua pihak termasuk institusi, kakitangan, pengadu dan pihak penguatkuasa berhak menerima layanan yang adil, profesional serta perlindungan terhadap hak-hak mereka sepanjang proses berlangsung.

Penghakiman awal oleh masyarakat, tekanan emosi, perbicaraan melalui media sosial atau tuduhan bersifat spekulatif hanya akan merumitkan keadaan dan boleh memberi kesan tidak adil terhadap reputasi, mata pencarian serta kesejahteraan emosi pihak-pihak yang terlibat.

Pendekatan yang sewajarnya ialah:

- mendokumentasikan fakta dengan teliti,

- memberi ruang kepada siasatan dan proses undang-undang berjalan secara profesional,

- mengelakkan eskalasi emosi,

dan mendapatkan nasihat perundangan yang sewajarnya apabila perlu.

Kematangan sesebuah masyarakat bukan diukur melalui seberapa cepat ia menghukum, tetapi melalui sejauh mana ia mampu menegakkan keadilan, keseimbangan dan prinsip proses yang adil untuk semua pihak.

A PIECE OF ADVICE

 

I wish to convey a message - on behalf of …

That in matters of governance and public discourse, there exist sacred boundaries which are not to be trespassed upon, neither in word nor in deed.

Let it be understood that this particular matter stands apart from the theatre of political contention, and is not to be drawn into disputation or manoeuvre.

All parties are therefore enjoined to exercise the utmost restraint and propriety, in accordance with established decorum and the dignity befitting such matters.

Any continued inclination toward overreach is regarded with grave reservation

Nak kirim satu mesej ulangan bagi pihak ...... :

Nak usik apa pun, usiklah, yang ni satu jangan diusik-usik.

Nak politik pun politiklah - jangan dok heret pihak lain ke sana ke mari.

Saja nak pesan sebab nampak macam menjadi-jadi pula.

DARA, AMOI AND KELAT

The issue revolves around three Malaysian elephants Dara, Amoi, and Kelat that were transferred from Zoo Taiping AND Night Safari to Tennoji Zoo under a “sister zoo” conservation and breeding collaboration agreement.

What triggered controversy was:

1) Videos and photos circulating online showing the elephants appearing stressed or uncomfortable.

2) Concerns that Japan’s climate and enclosure conditions may not suit Malaysian tropical elephants.

3) Reports involving Kelat’s tusk injury/trimming raised public alarm.

NGOs, activists, and some politicians questioned whether the transfer truly prioritised animal welfare or diplomacy/public relations.

Because of this, some NGOs requested:

1) independent monitoring,

2) psychological and behavioural assessment,

3) veterinary checks,

4) welfare audits,

and even if necessary, bringing the elephants back to Malaysia.

An independent review or oversight body need to be formed to examine:

1) living conditions,

2) stress behaviour,

3) feeding and enrichment,

4) veterinary care,

5) compliance with conservation agreements.

However, technically, animal welfare evaluation is usually done by:

1) wildlife veterinarians,

2) zoologists,

3) elephant behaviour specialists,

4) conservation experts,

rather than financial or governance auditors.

On the other side, the Malaysian government and zoo authorities say:

1) the move was planned for years,

2) Japan upgraded facilities before receiving the elephants,

3) Malaysian mahouts were sent to Osaka to care for them,

4) and ongoing monitoring shows the elephants are adapting.

So overall, the controversy is really about:

1) animal welfare,

2) ethics of moving endangered wildlife overseas,

3) public transparency,

4) and whether the conservation agreement genuinely benefits the elephants.

WRITING - WASTE OF TIME?

 
HARD TALK

I will not hesitate to block anyone who says the same thing to me, regardless of who they are.

Some people bluntly say, “You have too much free time Nik” or “You write too much.” Such remarks do not reflect intelligence, but rather a lack of appreciation for knowledge, literature, and intellectual contribution.

Let me ask this: when great writers spent years producing books that shaped minds and civilizations, did people accuse them of having too much time? When intellectuals and thinkers shared their knowledge through articles, essays, and commentaries that educated society, were they merely “writing too much”?

When religious scholars painstakingly wrote thick kitabs to guide generations in faith, morality, and wisdom, were they wasting time? When Jalal al-Din Muhammad Rumi composed poems that still touch hearts centuries later, or when William Shakespeare wrote dramas and scripts that became references for millions of writers, poets, playwrights, and even modern filmmakers, did anyone say they simply had “too much time”?

We share for the sake of mankind. We work like everyone else, carry responsibilities like everyone else, and face struggles like everyone else. Writing and sharing knowledge is a gift, and we choose to use that gift so it may benefit others.

It is far better to spread knowledge, awareness, wisdom, experience, and meaningful discussions than to contribute to fake news, empty gossip, slander, or viral untruths that mislead society.

The irony is that some people dismiss writers, reporters, journalists, poets, authors, and thinkers, yet they enjoy movies, documentaries, books, songs, and stories created through the dedication, sacrifice, creativity, and endless writing of others.

Every meaningful civilization was built not only by warriors, businessmen, and leaders, but also by thinkers, scholars, and writers whose words preserved knowledge, inspired change, and shaped humanity.

Writing is not a waste of time. Meaningless thinking is.

“Carik-carik bulu ayam, lama-lama bercantum juga.”

Begitulah indahnya ikatan kekeluargaan. Walaupun ada perselisihan faham sesama saudara-mara atau adik-beradik, kita perlu belajar untuk redha dan memaafkan kerana itu adalah sifat yang sangat mulia, walau sebesar mana pun luka yang pernah kita rasa.

Kita semua bukan manusia yang sempurna. Namun apabila kedua ibu bapa telah tiada, sudah pasti antara harapan terakhir mereka ialah mahu melihat anak-anak dan kaum keluarga mereka terus bersatu, menjaga silaturrahim dan tidak bermusuhan sesama sendiri.

Saya sendiri pernah melalui masalah dengan saudara terdekat. Tetapi akhirnya saya belajar untuk memaafkan dan menerima dengan hati yang reda walaupun ada yang masih tidak mahu memaafkan - kita perlu memulakan langkah terlebih dahulu walaupun kita benar apatah lagi jika kita salah.

Percayalah, di sebalik kemaafan itu hadir satu ketenangan jiwa yang sukar digambarkan, satu nikmat yang mungkin tidak pernah kita rasai selagi hati masih dipenuhi kemarahan.

M & E Technical Drawing Services

 

NOTHING IS FREE

There have been quite a number of enquiries about my services that appear suspicious. When I respond with a few basic questions, some enquirers become unusually persistent in pushing for engagement.

Let me be clear, I have nothing against genuine enquiries, but I reserve the right to decline, ignore, or block any request at my discretion.

There is no such thing as free services in this line of work, so attempts to fish for unpaid advice or exploit goodwill will not be entertained.

WHEN TECHNOLOGY OUTSMARTS CON

A new albeit rather clumsy scam tactic has surfaced. On two occasions, someone sent emails to my company impersonating me with the message:

“I am Nik Zafri bin Abdul Majid, are you in the office?”

What they didn’t realise is that all such emails are automatically copied to me and another partner (on one occasion, my partner even looked at me in amusement upon receiving it) so their attempt went straight back to the very person they were trying to impersonate.

Quite ironic.

SHORT ARTICLE - Bridging the Gap: CPD, Competency, Academic, Accreditation and Certification

I’ve been writing about this since the late 90s and early 2000s and now again in 2026, as I continue to observe persistent misunderstandings, twisted "plot" and evolving narratives around professional and academic development.

What follows is a clear, but often misinterpreted, distinction between several key pillars:

1. CPD Points vs Credit Hours

• CPD (Continuing Professional Development) points are awarded by professional bodies to ensure practitioners remain competent, current, and aligned with industry practices. In many regulated professions, e.g. Board of Engineers Malaysia, CPD is mandatory even for Graduate Engineers to maintain registration and eligibility to practise.

• Credit hours, on the other hand, are issued by academic institutions as part of formal education. They represent structured learning time and academic workload, contributing toward qualifications.

So, credit hours build the foundation (students), while CPD sustains and enhances the practitioner (professionals).

2. Competency-Based vs Academic Qualifications

• Competency-based certifications, such as those under TVET frameworks, National Vocational Training Centre (MLVK), or City and Guilds UK focus on what a person can do. They emphasize practical skills, technical ability, and job readiness. In many cases - the next step is to be licensed e.g. safety certifications under the Department of Occupational Safety and Health Malaysia.

• Academic qualifications, such as degrees, focus on what a person knows covering theory, research, and analytical capability.

So, competency is performance-driven (application), while academic qualification is knowledge-driven (foundation).

Sometimes, in the effort to secure employment for graduates, the easier path is taken and in doing so, the line between academic qualification and true competency can become blurred.

3. Certification Bodies vs Universities

• Accredited Certification Bodies (CBs) are formally accredited by entities such as UKAS or Department of Standards Malaysia (based on ISO/IEC 17021-1:2015) CB role is to audit and certify organizations against recognized standards, operating with independence and impartiality.

• Universities and higher learning institutions, regulated by bodies such as the Malaysian Qualifications Agency, award diplomas and degrees etc. Their function is education not certification of management systems or compliance.

CBs certify systems and organizations while universities award qualifications.

Additional Observations

Misunderstanding these roles can lead to misrepresentation, non-compliance, and reputational risks particularly in regulated industries. It is important to recognize that certification, accreditation, and qualification are distinct, each governed by its own framework of authority, traceability, and independence.

A healthy professional ecosystem depends on alignment not overlap between academic learning, industry competency, and certification systems. Ideally, professionals progress through all three stages:

Education → Competency → Continuous Professional Development.

This is the issue I often (and still) experience when too many entities positioning themselves as "professional bodies" while insisting or trying to mandate others to register under them. This has led to unpleasant repeated disagreements, largely due to their inability or reluctance to recognize legitimate professional certifications from overseas. Some have even remarked to me, “There aren’t many with your kind of professional certifications.” rather than openly admitting a lack of recognition, it seems the issue is framed as rarity when in reality, it reflects a deeper distinction between quality and quantity.

Conclusion

Academic knowledge shapes the mind, competency builds capability, and professional certification sustains credibility. When aligned effectively, these elements form a robust and resilient professional ecosystem.