Opinion
Save Parakrama Samudraya!
By Bandula Kendaragama, Dam Safety Consultant, Melbourne, Australia
This article is written based on information collated through consultations that were submitted as a technical report recently to President Gotabaya Rajapaksa and other relevant government authorities. The consultations were among those who had been interested in dam safety and directly involved in managing the “Narrowly-Missed” breach and in the reconstruction of the Parakrama Samudraya bund after the Cyclone in 1978. They considered it appropriate in sharing concerns and acquired knowledge with the public at this crucial juncture of decision-making on the safety of the aging irrigation infrastructures in Sri Lanka.
The Parakrama Samudraya Reservoir was built by King Parakramabahu the Great, during his reign (1153-1186 AD) and it has a reservoir capacity of 116,000 acre-feet, feeding approximately 25,000 acres of paddy cultivation. This reservoir has a bund 52 feet high and 10 miles long.
The study on the Parakrama Samudraya bund was undertaken owing to information and misinformation that had been widely shared and debated in the formal media, and especially in the social media, concerning the Parakrama Samudraya bund being proposed as a site to construct an 8-feet wide walking path. Further, it is noted that similar walking paths will be constructed on bunds of other reservoirs such as Kantale, Udukirala Wewa, etc.,
Cyclone in 1978
The 1978 Cyclone started with the onset of the storm formed on 20 November 1978 over the southwest Bay of Bengal. It intensified gradually, reaching Super Cyclonic Storm Status Category 4 Cyclone on 23 November with a gusty wind speed of 220 kmph. The 1978 Cyclone was the second strongest Super Cyclonic Storm to strike Sri Lanka’s Eastern Province since modern records began. The cyclone attained peak intensity on November 23, before making landfall in Batticaloa. The Eastern Province was heavily affected by the cyclone.
The cyclone had devastating impacts in Sri Lanka, killing about 915 people and an unaccounted number of cattle and other animals. An estimated more than one million people were affected, with over 250,000 buildings damaged, and one-fifth of Batticaloa’s fishing fleet destroyed. Nine of the 11 paddy stores were destroyed and 90 % of the coconut plantation (about 28,000 acres) in the Batticaloa district were destroyed. Also, in Polonnaruwa District, the public and private infrastructure, paddy, and rice stored in Food Commissioners and Cooperatives, coconut cultivation, etc., were devastated.
Cyclone 1978 and Parakrama Samudraya
The Cyclone reached the Parakrama Samudraya bund at about 6:30 pm on 23 November and lasted till about 4:00 am on 24 November. According to eyewitnesses, the height of the waves was 10 to 12 feet. Knowing the imminent catastrophic danger of overtopping leading to a breach of the bund, the Irrigation Engineer in charge of Polonnaruwa A. D. S. Gunawardana, the Government Agent Polonnaruwa Austin Fernando, and a few other officials, on duty, decided to be ready with a few bulldozers and retain them standby at strategic locations such as at the sluice and spillway, to breach the bund at these locations if the need arises.
The idea behind this decision was if the predicted overnight rainfall occurred and the anticipated inflow to the Parakrama Samudraya did really eventuate, the inflow would have been greater than the outflow with all 10 radial gates and the sluice gates kept open. Then there was a risk of overtopping and breaching the bund. Hence, an artificially introduced breach of the bund to discharge floods along the existing channels would prevent a haphazard catastrophic breach at an unknown and unwanted location, which could inundate the heavily populated downstream areas. Such an emergency rapid drawdown is the standard practice to prevent a dam breach. Fortunately, predicted overnight rainfall was low. However, the drawdown of the reservoir continued overnight.

Following the overnight drawdown, about 2/3 of the 12-feet wide bund top road and a fair portion of the upstream shoulder were found to be slipped into the reservoir, leaving only about 1/3 of the bund top road intact. There were widespread such slips along the full length of the bund. The damaged areas were repaired with earthfill and Ralapanawa reinstated as a short-term risk reduction measure. The upstream face of the Ralapanawa was not flattened to improve the safety margin (i.e., Factor of Safety) of the bund in case of future similar drawdowns as it was a long-term risk reduction measure to be implemented by the Government Authorities. Therefore, consideration should be given to implementing appropriate long-term risk reduction measures.
Walking Track Proposal
Based on information available to date, the proposed walking path will be constructed on the upstream side of the bitumen surfaced bund top road where there was a sliding failure during the 1978 cyclone and floods (See Figure above 1).
Several long tension cracks, sealed with tar, are present on the bitumen surfaced bund top road as seen in videos of Sri Lanka media. Most of them are located along (parallel) the bund top road, thus increasing the risk of sliding failures similar to those that occurred during the 1978 floods. Additional loads due to the construction of a walking path would widen and deepen those tension cracks, compromising the safety of the bund, which is not known.
Therefore, it is the considered view that additional loading on top of the 1978 sliding mass for construction of the walking path would increase the risk of reactivating the 1978 slides during a future rapid drawdown, similar to in 1978.
It is understood and appreciated that the Irrigation Department is currently undertaking geotechnical investigations to assess the safety margin of the bund.
The highest concern is dam-safety
Based on information available, it is understood that there is a period of 741-years (i.e., from 1159 to 1900), where the performance of the bund is not documented and unknown. However, it is reported that the bund was totally breached during the colonial era. According to R L Brohier, the bund and the reservoir were abandoned for more than a century.
Given that the population at risk in case of a dam break is extremely high, it appears that the consequence category of this bund is “Extreme” as per the current international dam safety guidelines. Therefore, the proposed walking path at Parakrama Samudraya cannot be compared to that of the Kurunegala Wewa, Boralesgamuwa Lake, etc., constructed along the reservoir rim, and the walking paths constructed around water bodies in the suburbs of Colombo.
It is understood that the Parakrama Samudraya is formed by combining three reservoirs of unknown history. Therefore, the bund may have been raised in several stages during the 741-years associated with unknown performance. It is not known whether dam safety-related defects of the bund such as slips or slides, cracks, animal burrows, sinkholes, soft areas, root bowls, zones of desiccation cracking, zones of residual shear strength because of historical failures, etc., were repaired to satisfactory standards, or not.
The aging of dams constructed of earth and rockfill material is due to time-related changes in the properties of the materials of the structure and its foundation. As reported in a technical paper published in May 2010 by the United States Society of Dams, the aging or deterioration of embankment dams and their foundations are of concern. These concerns extend throughout the entire life of the dam until safe abandonment or demolition.
Recent interventions on dam-safety
Given the dam safety issues associated with this controversial walking path project, the Water Forum of the Institute of Engineers in Sri Lanka conducted a Webinar on 09 September 2021 on “Usage of Inland Water Bodies for Recreation”. More than 280 personnel, mainly engineers, participated in this Webinar and raised over 100 questions related to the safety of the bund. Several questions were raised on fundamental errors and potential failure modes associated with the proposed walking path. It appears that ad hoc decisions have been taken for reasons unknown. The lack of laws and dam safety regulations in Sri Lanka could be one of the reasons for such ad hoc decisions taken by various individuals and organisations.
As far as dam safety regulations are concerned, India is well ahead of Sri Lanka. Even Ghana in Africa has introduced Dam Safety Regulations to ensure the safe design, construction, operation, and maintenance as well as decommissioning of dams.
Based on statistics of embankment dam failures and accidents, 48% of dam failures are related to overtopping and failures of appurtenant structures, and 46.5% are due to internal erosion. Due to the absence of an internal filter system in this bund, not only the slope instability, but the internal erosion is also likely to be a prominent potential failure mode.
It is understood that planning is underway to construct several fast-food outlets, toilet facilities (including a “changing room”) at the toe of the bund, i.e., within the reservation area of the bund located immediately downstream of it. It is to be stressed that this stretch of land along the bund is a critical area to ensure the safety of the bund. Identification of dam safety features such as heaving the ground, cracks, wet areas, springs, seepage locations, etc., in this area, is critical. Digging of lavatory pits, trenches, etc., could intercept permeable layers in the foundation and may trigger “backward erosion tunnels” leading to piping, which is a major failure mode in embankment dams (or, bunds). Excavations in this area could lead to sides of the downstream face of the bund, compromising its safety margin.
Should there be a need to improve the safety margin of the bund, additional stabilizing fills are to be constructed in this area over the downstream face of the existing bund. An access road along the downstream toe of the bund is an essential item for repairs and routine maintenance of the bund. Given the proximity to the dam, this reservation area should be used to stockpile materials to be used during dam emergencies such as filter sand, crushed rock, rockfill, etc., and movement of construction machinery for maintenance and repairs. This area is an integral part of the bund, hence should not be used for either permanent or temporary constructions. Therefore, consideration should be given to providing these facilities at an alternate suitable location, perhaps close to the Government Agent’s residence, or thereabouts.
Recommendations to maintain dam safety
Based on dam safety concerns and consequences discussed, it is recommended that,
1) the crest of the bund is reserved for routine maintenance, including replacement of displaced Ralapanawa if necessary, placement of additional boulders if required, and for construction of temporary overtopping protection bund using ‘Sandbags”, as and when required.
2) the stretch between the Ralapanawa and bitumen road be reserved for the construction of a wave wall to meet the dam safety requirements of future hydrological reviews to be undertaken during the service life of the reservoir and bund.
3) a safe “Load Capacity” be imposed on the bund top road, and arrangements are made to stop all heavy trucks plying on the bund top road as the bund has not been designed for such traffic loads.
4) the bund top road is completely closed for all traffic, say from 5:30 am to 7:30 am and then from 6:00 pm to 9:00 pm or as agreed by local authorities, in the preferred 2km long stretch, and then the existing bitumen surfaced bund top road to be used as the walking path (Alternatively, only the upstream-half of the bitumen surfaced bund top road to be used as the walking path while the downstream-half of the bitumen surfaced bund top road to be kept open for one-way light traffic only, subject to nominated maximum speed to ensure the safety of people using the walking path).
5) an alternative walking path (For example, in the reservoir rim), be investigated which will not compromise the safety of the dam.
6) the reservation area located immediately downstream of the bund is not used for developments that are been planned by the Urban Development Authority as this area is very sensitive to dam safety issues.
7) the reservation area located immediately downstream of the bund, which is an integral component of the dam, be a property of the Irrigation Department for inspection and monitoring of critical dam safety features, construction of a toe access road, construction of stabilizing fills if required, stockpiling of construction materials required during dam emergencies, etc.,
8) a potential failure modes analysis and Risk Assessment be undertaken in accordance with international dam safety standards.
9) a Design and Safety Review of the dam and appurtenant structures be undertaken in accordance with the international dam safety standards incorporating review of geotechnical parameters of the bund and foundation, hydrology, wave run-up, seismicity, flood handling capacity, reliability of gates and instrumentation, etc.,
10) sufficient funds must be allocated to undertake Design and Safety Reviews of all “Extreme” consequence category dams in Sri Lanka.
11) sufficient funds must be allocated to routine maintenance of dams (Note: Depending on their nature, some maintenance items, if not addressed in a systematic and timely manner, may eventually become dam safety issues, eventually leading to failure of dams).
12) early arrangements must be made to implement the recommendations of the Cabinet Memorandum No. 11-2020 dated 26 October 2020 on the Establishment of a Dam Safety Consultation Centre and a Dam Safety Regulatory Mechanism.
(The author can be contacted on email: bandula.kendaragama@gmail.com)
Opinion
Nilanthi Jayasinghe – An Appreciation
It was with shock that I realized that the article in the Sunday Island of April 5 about the winsome graduate gazing serenely at her surroundings was, in fact, an obituary about Nilanthi Jayasinghe, a former colleague who I had held in high esteem. I had lost touch with Nilanthi since my retirement and this news that she had passed away, saddened me deeply
I knew and had worked with Nilanthi – Mrs Jayasinghe as we used to call her – at the Open University of Sri Lanka in the 1990s. As Director, Operations, she was a figure that we as heads of academic departments, relied on; a central bastion of the complex structure that underpinned academic activities at Sri Lanka’s major distance education provider. Few people realize what it takes to provide distance education in an environment not geared to this form of teaching/learning – the volume of Information that has to be created, printed and delivered; the variety of timetables that have to be scheduled; the massive amount of continuous assessment assignments and tests that have to be prepared and sent out; the organization of a multitude of face-to face teaching sessions; the complex scheduling of examinations and tests – all this needed to be attended to for a student population of more than 20,000 and for 23 centres of study dotted across Sri Lanka.
It was an unenviable task but Nilanthi Jayasinghe with her flair for organization, handled it all with aplomb and a deep sense of commitment. If there were delays and inconclusive action on our part, she never reprimanded but would work with us to sort things out. Her work as Director, Operations brought her into contact with staff across the spectrum-from the Vice-Chancellor to the apprentice in the Open University’s Printing Press. Nilanthi treated everyone with dignity and as a result, was respected by all at the university. She was sensitive, kind-hearted, a good friend who would readily share problems and help to solve them. The year NIlanthi retired, I was out of the island. When I came back to the Open University, I felt bereft without the steadfast support of her stalwart presence .
The article in the ‘Sunday Island’ describes her life after retirement, looking after family members and enjoying the presence of a granddaughter.
After a lifetime of commitment to others, Nilanthi Jayasinghe truly deserved this happiness.
May she be blessed with peace.
Ryhana Raheem
Professor Emeritus
Open University of Sri Lanka.
Opinion
James Selvanathan Mather
James Mather (Selvan to all of us) who passed away recently at the age of 95 was one of the leading Chartered Accountants in the country. He was the senior partner of Ernst and Young for long years, and the mentor for a generation of chartered accountants. He was confidante and adviser to many of the leading businessmen of his time. His career spanned over six decades. A man who never sought the limelight, he was very influential in Ceylon/Sri Lanka’s business world.
Selvan Mather was born in 1930 to a well-known Christian family in Jaffna. His father, Rev. James Mather was Head of the Methodist Church in Ceylon. Selvan was educated at Trinity College Kandy, and he had a life-long connection with the school. He entered the University of Ceylon in the late 1940s, at a time when Ivor Jennings was Vice-Chancellor.
He read economics and passed out with an honours degree. For short periods he was in the Department of Income Tax and with the newly established Central Bank of Ceylon. The Central Bank facilitated him to go to England to qualify as a chartered accountant. His two referees, when seeking admission to an accountancy firm in the U.K. were M.D.H. Jayawardena, then Minister of Finance and the Auditor General of Ceylon, L.A. Weerasinghe. Being a chartered accountant was a rare event those days.
On his return from England, his career was with Ernst and Young where he became senior partner. He was close advisor and confidante to many of the leading businessmen. He was admitted to its Hall of Fame by the Institute of Chartered Accountants.
To strike a personal note, I got to know him 50 years ago when he applied for a fellowship given by the Asian Productivity Organisation (APO) in Tokyo. I was in the Ministry of Planning and Economic Affairs at the time, and the Ministry was handling APO affairs in Colombo. He told me later that he enjoyed his time in Tokyo. From that time, we kept up a friendship with him and Nelun, which lasted 50 years.
My wife, Rukmal, and I lived in Windsor England, for about 25 years. During that time, Nelun and Selvan were regular visitors to England. I remember taking him for long walks in Windsor Great Park, and on the grounds of Eton College which were nearby. We went on long car tours in England covering the Cotswolds, the Peak districts and the Potteries. I remember celebrating Selvan’s 70th birthday in London at a Greek restaurant, along with his great friends, Nihal and Doreen Vitarana. Memories remain, although Selvan is no more.
In the last decades of his life we saw Nelun and him often. A few of us, Manik de Silva, Nihal and Srima Seneviratne and a few others met regulsrly for lunch. We will all miss Selvan who was mine of his life and times very much.
Selvan leaves his wife Nelun and three children and their husbands – Rohan, Shyamala and Indi, and Rehana and Akram. It was a close-knit family and they will miss him.
Leelananda De Silva.
Opinion
War with Iran and unravelling of the global order – II
Broader Strategic Consequences
One of the most significant strategic consequences of the war is the accelerated erosion of U.S. political and moral hegemony. This is not a sudden phenomenon precipitated solely by the present conflict; rather, the war has served to illuminate an already evolving global reality—that the era of uncontested U.S. dominance is in decline. The resurgence of Donald Trump and the reassertion of his “America First” doctrine reflect deep-seated domestic economic and political challenges within the United States. These internal pressures have, in turn, shaped a more unilateral and inward-looking foreign policy posture, further constraining Washington’s capacity to exercise global leadership.
Moreover, the conduct of the war has significantly undermined the political and moral authority of the United States. Perceived violations of international humanitarian law, coupled with the selective application of international norms, have weakened the credibility of U.S. advocacy for a “rules-based international order.” Such inconsistencies have reinforced perceptions of double standards, particularly among states in the Global South. Skepticism toward Western normative leadership is expected to deepen, contributing to the gradual fragmentation of the international system. In this broader context, the ongoing crisis can be seen as symptomatic of a more fundamental transformation: the progressive waning of a global order historically anchored in U.S. hegemony and the emergence of a more contested and pluralistic international landscape.
The regional implications of the crisis are likely to be profound, particularly given the centrality of the Persian Gulf to the global political economy. As a critical hub of energy production and maritime trade, instability in this region carries systemic consequences that extend far beyond its immediate geography. Whatever may be the outcome, whether through the decisive weakening of Iran or the inability of external powers to dismantle its leadership and strategic capabilities, the post-conflict regional order will differ markedly from its pre-war configuration. In this evolving context, traditional power hierarchies, alliance structures, and deterrence dynamics are likely to undergo significant recalibration.
A key lesson underscored by the war is the deep interconnectivity of the contemporary global economic order. In an era of highly integrated production networks and supply chains, disruptions in a single strategic node can generate cascading effects across the global system. As such, regional conflicts increasingly assume global significance. The structural realities of globalisation make it difficult to contain economic and strategic shocks within regional boundaries, as impacts rapidly transmit through trade, energy, and financial networks. In this context, peace and stability are no longer purely regional concerns but global public goods, essential to the functioning and resilience of the international system
The conflict highlights the emergence of a new paradigm of warfare shaped by the integration of artificial intelligence, cyber capabilities, and unmanned systems. The extensive use of unmanned combat aerial vehicles (UCAVs)—a trend previously demonstrated in the Russia–Ukraine War—has been further validated in this theatre. However, unlike the Ukraine conflict, where Western powers have provided sustained military, technological, and financial backing, the present confrontation reflects a more direct asymmetry between a dominant global hegemon and a Global South state. Iran’s deployment of drone swarms and AI-enabled targeting systems illustrates that key elements of Fourth Industrial Revolution (4IR) warfare are no longer confined to technologically advanced Western states. These capabilities are increasingly accessible to Global South actors, lowering barriers to entry and significantly enhancing their capacity to wage effective asymmetric warfare. In this evolving context, technological diffusion is reshaping the strategic landscape, challenging traditional military hierarchies and altering the balance between conventional superiority and innovative, cost-effective combat strategies.
The war further exposed and deepened the weakening of global governance institutions, particularly the United Nations. Many of these institutions were established in 1945, reflecting the balance of power and geopolitical realities of the immediate post-Second World War era. However, the profound transformations in the international system since then have rendered aspects of this institutional architecture increasingly outdated and less effective.
The war has underscored the urgent need for comprehensive international governance reforms to ensure that international institutions remain credible, representative, and capable of addressing contemporary security challenges. The perceived ineffectiveness of UN human rights mechanisms in responding to violations of international humanitarian law—particularly in contexts such as the West Bank and the Gaza Strip, and more recently in Iran—has amplified calls for institutional renewal or the development of alternative frameworks for maintaining international peace and security. Moreover, the selective enforcement of international law and the persistent paralysis in conflict resolution mechanisms risk accelerating the fragmentation of global norms. If sustained, this trajectory would signal not merely the weakening but the possible demise of the so-called liberal international order, accelerating the erosion of both the legitimacy and the effective authority of existing multilateral institutions, and deepening the crisis of global governance.
Historically, major wars have often served as harbingers of new eras in international politics, marking painful yet decisive transitions from one order to another. Periods of systemic decline are typically accompanied by instability, uncertainty, and profound disruption; yet, it is through such crises that the contours of an emerging order begin to take shape. The present conflict appears to reflect such a moment of transition, where the strains within the existing global system are becoming increasingly visible.
Notably, key European powers are exhibiting a gradual shift away from exclusive reliance on the U.S. security umbrella, seeking instead a more autonomous and assertive role in global affairs. At the same time, the war is likely to create strategic space for China to expand its influence. As the United States becomes more deeply entangled militarily and politically, China may consolidate its position as a stabilising economic actor and an alternative strategic partner. This could be reflected in intensified energy diplomacy, expanded infrastructure investments, and a more proactive role in regional conflict management, advancing Beijing’s long-term objective of reshaping global governance structures.
However, this transition does not imply a simple replacement of Pax Americana with Pax Sinica. Rather, the emerging global order is likely to be more diffuse, pluralistic, and multilateral in character. In this sense, the ongoing transformation aligns with broader narratives of an “Asian Century,” in which power is redistributed across multiple centers rather than concentrated in a single hegemon. The war, therefore, may ultimately be understood not merely as a geopolitical crisis, but as a defining inflection point in the reconfiguration of the global order.
Conclusion: A New Era on the Horizon
History shows that major wars often signal the birth of new eras—painful, disruptive, yet transformative. The present conflict is no exception. It has exposed the vulnerabilities of the existing world order, challenged U.S. dominance, and revealed the limits of established global governance.
European powers are beginning to chart a more independent course, reducing reliance on the U.S. security umbrella, while China is poised to expand its influence as an economic stabiliser and strategic partner. Through energy diplomacy, infrastructure investments, and active engagement in regional conflicts, Beijing is quietly shaping the contours of a more multipolar world. Yet this is not the rise of Pax Sinica replacing Pax Americana. The emerging order is likely to be multilateral, fluid, and competitive—a world in which multiple powers, old and new, share the stage. The war, in all its turbulence, may therefore mark the dawn of a genuinely new global era, one where uncertainty coexists with opportunity, and where the next chapter of international politics is being written before our eyes.
by Gamini Keerawella
(First part of this article appeared yesterday (08 April)
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