Features
Restaging Z-Score Debacle
The release of the Z scores for university admission by University Grants Commission (UGC) has brought thousands of complaints and issues from the students, parents, teachers and other stakeholders into discussion. Some others have vowed to take the issue to courts, expecting a fair and just solution.
Most of the complaints are related to the issue of two different cutoff Z scores for new syllabus and old syllabus and comparisons thereof. It is understood that the solutions proposed to resolve a crisis must not only be fair and legal but also seen to be reasonable for the stakeholders. Print media during the last couple of weeks published several opinions on this issue and the use of Z score for university admission is often blamed as the reasons for these discrepancies. It is time we had a closer look at the problem and baseless allegations against the use of Z-score for university admission. The use of Z-score in place of aggregated marks of the three subjects is, by all means, a better method, which has been amply demonstrated with data and examples and subjected to discussion since its introduction for university admission in 2003.
There is a diverse degree of variability in nature itself and so it is with the humans and their work. The scientific discipline called statistics provides the conceptual and procedural approaches to understand the variability and manage it fairly and equitably. Due to the inherent variability present in question papers and evaluations, it is very well understood that the simple aggregate obtained from the marks of different subjects is not a fair criterion for determining the eligibility for university admission. The degree of difficulty of the question papers in different subjects varies significantly and also there are variations of the aptitude measurement scale in different years. Therefore, it was not possible to have a fixed cut-off mark or simple aggregate solution to determine eligibility for university admission. For example, marks for one subject could have a range from 5 to 70 while the range for another subject spans from 45 to 99. A student who obtained 70 is the best among the lot in the first case and the one who obtained 70 in the second case is a mediocre student. When the simple aggregate is taken as the criterion for university admission, the best student in the first case is treated equally with the mediocre student who opted for a relatively easy subject as in the second case. Within the general assumption that students who sit for these two different subjects have a more or less equal level of competence, the disparity in the relative difficulty of the question papers or evaluation criteria warrants some sort of an approach for standardization. This issue was the theme for a series of discussions in academic circles and despite several advanced methodologies available for standardization, the Z score approach was adopted about 20 years back as the criterion for university admission due to its simplicity, computational convenience, application efficiency and the need for only two parametric estimates for its calculation.
Today, the issue is somewhat different and it is not possible to assume that the students who sat for two different papers in the same subject are having a more or less equal level of competence or they are random picked from the larger population. The first group has sat for the examination for the first time and the other group has at least attempted to pass the examination on one or more previous occasions. This is evident from the number of the first, second and third attempt students in different disciplines. In exploring a solution to this present problem, the underlying assumptions made in calculating the Z score rankings need to be reexamined. One of the assumptions is that the aptitude of knowledge and skills of the student population opting for different subjects or subject streams are not significantly different. This assumption should be validated now because almost all the students who sat the examination under the old syllabus except those with valid medical or other reasons have made a failed attempt to enter university earlier.
Those who qualify from the new syllabus are a group of students who took the examination for the first time. The assumption of equal knowledge and similar competency level and skill background for these two diverse groups introduces an error into the fair selection process. It is not possible to issue a single series of Z-scores for these two groups. Before processing marks, the hypothesis of statistically non-significant difference between these two student groups needs to be validated with at least past data for a period of 5 years. Since this hypothesis cannot be proved, then the degree of dissimilarity needs to be assessed to determine a fair ratio for university admission from these two groups of students and design a quota for these two groups. This is what the UGC has attempted to employ in the selection process, however, higher differences in the cut-off Z scores due to the impact of quota applied for the two groups has led to serious doubts in the mind of those without an in-depth knowledge of the method.
The second issue is whether the relative difficulty of two questions papers in both old and new syllabi is significantly different. The expert opinion is the only choice we have in this decision. If experts believe that the two sets of questions papers are of more or less a same level of standard, then the two results could have been combined into a single data series with only one set of Z scores and cut-off marks. Unfortunately, there is no evidence to show that this option had been explored by the UGC. If the question papers are at significantly different standards, then it is not possible to combine the two results series. Then the question must be asked from the Department of Examinations why the standards were made to be different and a strong justification for such an action. We always advise our students that they should propose a valid statistical methodology before they collect their data for research to ensure the compatibility of data with the statistical techniques to be employed in the analysis. Unfortunately, the Department of Examinations could not stick to this advice and only seeks a statistically valid solution after collecting the data from student examinations.
Without understanding the pertinent facts, some argue that the mistakes made in 2011/12 university admission have been repeated in releasing the Z-scores for 2019/20 university admission. A similar problem indeed arose in 2011/12 admission due to the release of Z scores, combining the results of students who followed the GCE Advanced level under old and new syllabi. However, in 2011/12 university admission, the major issue was the errors made in the calculation of Z scores by the Department of Examinations. That mistake was further complicated due to the release of a single Z score combining the two distinctly different student populations of old and new syllabi as a single group by the UGC. A presidential expert committee was appointed to look into the problem and the mistake in the calculation was quickly identified and corrected. Besides, the need to consider the two student populations of old and new syllabi separately for university admission was proposed and it was later approved by a Supreme Court judgment in a case filed by a group of aggrieved students.
There are few solutions which could have been adopted to avoid the complexity of the problem and misunderstanding among the students, parents and teachers:
a) The easiest approach would have been the designing one question paper for both groups of students sitting the examination under both old and new syllabi giving options to select questions from the areas that had been revised or amended in the new curriculum. It is observed that there have been no major deviations and only minor changes have been made as regards Physics and Chemistry. The relative difficulty level needs to be maintained across all optional questions. Then, it is a single question paper and a single Z score series generated from the results. This should have been achieved at the point of setting of question papers by the examiners with clear instructions.
b) if the two questions papers, although structurally different, are of the same level of difficulty, the results of the two examinations could have been combined and Z scores computed as a single series.
This solution could have been explained to the Supreme Court and concurrence on this approach sought.
It could have been assumed that although the student populations were different, the same level of tests had been administered for both groups and therefore,
c) The most reasonable solution for the problem is to determine the ratios of students admitted to universities for each subject stream and each degree programme separately for old and new syllabus students, and then for each case use the five-year maximum proportion to admit students to universities. Then the total would exceed one hundred since the maximum of both ratios would exceed 100 and a small proportion of students needs to be admitted to each degree programme to avoid any obvious injustice. The use of median value can also be adopted unless there is a positive or negative trend in the ratios. If the five-year values are stationary and have a low variability among years, this becomes a fair solution. In case the five-year values are having a higher degree of variability and an obvious trend, the most recent value should have been the choice. This method of median value was adopted this year and due to the quota being significantly different for different disciplines and degree programmes, the cut-off Z scores have shown many differences for new and old syllabi students. Also, the cut-off Z-scores are significantly high compared to the figures of the previous years due to the application of quota which sometimes 25% of the original 100. This is the reason for the complaints although the method used for selection is in keeping with the ruling of the Supreme Court in 2012.
However, this problem could have been avoided if the two series of Z scores were adjusted as per the quota granted for each series. A simple mathematical computation could have brought the two distributions on a comparable model. The adjusted Z scores are comparable with the figures of the previous years and it would not produce cut-off Z scores which are much different for students in two groups. The confusion created due to the releasing Z scores indicating a different level of access to university entrance in the two different groups could have been avoided with the help of such an approach.
The writer is Former Vice-Chancellor of the Uva Wellassa University and Chairman of the UGC University Admission Committee in 2013/14 and member of Presidential Committee on Z score in 2012 .
Features
Approach to constitutional reform
The S.J.V. Chelvanayakam KC Memorial Lecture delivered on 26 April, at Jaffna Central College, by Professor G.L. Peiris, an academic with outstanding credentials, was published, under the title, “Federalism and paths to constitutional reform,” in The Island of 27 April, 2026.
In Part II of the publication, titled “Advocacy of Federalism: Origins and Context,” Professor Peiris states: “At the core of political convictions he held sacrosanct was his unremitting commitment to federalism…”. Contrary to popular belief, however, federalism in our country had its origins in issues which were not connected with ethnicity. At the inception, this had to do with aspirations, not of the Tamils but of the Kandyan Sinhalese. The Kandyan National Assembly, in its representations to the Donoughmore Commission in 1927, declared: “Ours is not a communal claim or a claim for the aggrandizement of a few. It is the claim of a nation to live its own life and realise its own destiny”.
Commenting on S.W.R.D. Bandaranaike’s views, Professor Peiris states: “Soon after his return from Oxford, as a prominent member of the Ceylon National Congress, was an advocate of federalism. He went so far as to characterise federalism as ‘the only solution to our political problems”.
THE COMMON THREAD
The thread that is common to the sources cited above is that while their focus was on the political framework, there is not even a hint as to the territorial units to which the political framework of federalism is to apply. With time the Tamil “nation” claimed that their federal State was to be the Northern and Eastern Provinces of Sri Lanka. However, the Kandyan “nation” was silent on this issue. Since Britain annexed the Kandyan Kingdom and the unified, then Ceylon in 1815, for all intents and purposes it would be reasonable to assume that the claim of the Kandyan “nation” was to be the region under the last Kandyan King, leaving the Western and Southern coastal regions for the Rest of the “nation”.
Sri Lanka, while being a colony under the British, was not interested in political frameworks. Instead, the British were interested in structural arrangements that facilitated Administration. It is evident from the evolutionary processes explored by the British that subdivided units of a State are critical not only for effective Administration but also for the political framework that ensures political stability. Federalism, advocated by the Tamil and Kandyan Leaderships for territorial units, as claimed by them, would inevitably lead to political instability. The lesson to be learnt is not to start with political frameworks, such as Federalism, but to first decide on the territorial units, within which a State functions, to ensure stability, and then frame political aspirations of the People belonging to such a State, in order to ensure political and structural stability.
LESSONS of HISTORY
Material from an article, dated 16 June, 2016
“When the British took control of the Dutch possessions in former Sri Lanka, in 1796, the Kandyan Kingdom was independent and separate from the Maritime region. The Kandyan Kingdom consisted of the “central highlands with the eastern and southeastern coastal strips”. It was after ceding of the Kingdom, at the Kandyan Convention of 1815, and after the rebellion of 1817-1818, that the two regions were merged. However, despite the merger, the administration of the two regions remained divorced from each other, with the Kandyan region being divided into 11 Districts, and the Maritime region into five, creating a total of 16 Districts for the administration of the whole country (Sir Charles Collins, Public Administration of Ceylon, 1951, p. 49).
“The above arrangements continued until the recommendations of the Colebrook – Cameron Commission. In 1832, the recommendations of the Commission were accepted , “… and the separate administrative system for the Kandyan provinces was abolished and amalgamated with the territories on the littoral acquired from the V.O.C. in a single unified administration structure for the whole island. The existing provincial boundaries within the two administrative divisions – the Kandyan and maritime provinces – were redrawn, and a new set of five provincial units, of which only one – the Central Province – was Kandyan pure and simple, was established. The new provincial boundaries cut across the traditional divisions and placed many Kandyan regions under the administrative control of the old maritime provinces” (K.M.de Silva, A History of Sri Lanka, 1981, p. 263), continued until as late as 1889, resulting in nine Provinces for the sole purpose of facilitating the Colonial administration. In point of fact, the Province never functioned as the administrative unit. Instead, the administrative unit was essentially the District, and the situation has remained so throughout the Colonial period and into this day. According to Sir Charles Collins cited above: “Most provinces were divided into districts, each Government Agent having charge of his own district, with general supervision over the whole province. The districts not in the direct charge of Government Agents were under the control of assistant Government Agents”. (Ibid, p. 62.)
PRIORITISING POLITICS OVER STABILITY
The lesson learnt by the British was that if a Colony is to be Administered effectively, the Colonizer had to choose the most appropriate unit of administration. Similarly, to an Independent Sovereign State, Territorial Stability should be its foremost priority. This means deciding on the most structurally secure territorial unit within which political power sharing should operate and not prioritise political frameworks, such as Federalism, at the expense of the structural stability of the State. Political instability would have been inevitable had Sri Lanka succumbed to pressures from the Tamil and Kandyan Leaderships.
Although Britain was not concerned with territorial stability, they recognised that the District was the most effective unit for effective administration. In fact, the 1977 Constitution describes the Territory of Sri Lanka in terms of Administrative Districts. Despite this, it was the Indo-Lanka Accord that first recognised the Northern and Eastern Provinces as political units. Following this, the 13th Amendment of 1987 extended this recognition to all Provinces.
The adoption of the Province as the political unit may not have had an impact on the territorial integrity of the Sri Lanka State, except for the Northern and Eastern Provinces, judging from the events that followed over three-plus brutal decades. The transformation of the territory of Sri Lanka, from Administrative Districts to Provinces and Provincial Councils, is the direct result of prioritising politics over territorial stability. For India to be the handmaiden of this transformation is beyond comprehension because instability in Sri Lanka, in whatever form, would impact on India’s own territorial integrity. This serious blunder cannot be ignored any further for the sake of both Sri Lanka and India. It is imperative that measures are taken to engage in a course correction through Constitutional Reform.
PROPOSED CONSTITUTIONAL REFORMS
The path to Constitutional Reform should start with the territorial subdivision of the Sri Lankan State into Districts, not only to ensure the territorial integrity of the State but also to improve administrative and development efficiencies coupled with Local Government units; a lesson learnt from the British. Any political powers devolved/decentralised to Districts should be the responsibility of District Councils, elected by representatives to Local Governments within each District.
Political power at the Centre should reflect the commitment to a single Sri Lankan Nation, through an elected Legislature, with Executive Powers being shared by a President/Prime Minister, with a Cabinet made up of all communities, in the ratio represented in Parliament. An attempt to share Executive Power with all communities, in an inclusive Cabinet, has not been the practice in the past, and under the present government, as well, despite its strident calls for unity and reconciliation. Consequently, the tendency for minority communities is to seek peripheral power to the maximum extent possible.
CONCLUSION
The approach to Constitutional making has been how best to accommodate political power in the form of Federalism, first by the Kandyan “nation” and later by the Tamil “nation”. The claim by the Tamil Leadership morphed from Federalism to a Separate State resulting in tragedies of an unimaginable order, to the point of threatening the very existence of the Sri Lankan State.
The current arrangement is based on Power being devolved to Provinces, in the form of Provincial Councils, with no regard the Province, makes to the territorial durability of the Sri Lanka State. How successive Governments hope to prevent threats to territorial vulnerabilities is to curtail the operation of sensitive provisions of devolved powers. This is being disingenuous.
On the other hand, the more direct and forthright approach to Constitutional Reform is to make the District the unit of peripheral power in order to ensure territorial stability and effective peripheral development and share Executive Power with communities in the ratio of their representation in the Legislature. The first could be achieved through a referendum and the second by the President/Prime Minister of any government. This approach prioritises territorial stability over political power; a change that has eluded policymakers. Therefore, it is imperative that territorial stability is given the foremost place in Constitutional Reform processes for the sake of not only Sri Lanka but also for India, for reasons of connectivity.
by Neville Ladduwahetty
Features
Time to get ready to face power
The power cuts are already here. Perhaps, even before the date predicted by the Public Utilities Commision of Sri Lanka (PUCSL. The peak load has gone well past the threshold they indicated as the tipping point of 3030 MW of peak load. It is now will past 3100 MW and growing, perhaps triggered by the continued heatwave making the use of air conditioners and fans more frequent and by a wider group of consumers. The government insists there is no intention of power cuts but each of us have experienced some form of power outage, without notice, at some time or other.
It is in this scenario that the Ceylon Electricty Board (CEB), or whatever it is called now, had directed all roof top solar projects, over 300 MW capacity, to shut down for the period 10th April to 20th April.
This is in addition to the curtailment of all ground mounted solar and wind projects, and even mini hydro projects, without compensation, going on for some months.
One year of inaction by CEB with the problem staring in the face
If will be recalled that the same demand was made in April, 2025, after the debacle of the countrywide blackout on 9th February, 2025, whether caused by a monkey or otherwise.
The question to be raised is what steps have been taken by the then CEB, or the Ministry to anticipate the situation this year, too, and to try and mitigate the same.
The easy answer is absolutely nothing. If at all what has been done is unilaterally prevent any further addition of Roof Top Solar PV, under the provisions of the Surya Bala Sangramaya (SBS), is, undoubtedly, the only short term and economical means to add low cost renewable electrical energy to the grid.
The architect of the SBS, the Sustainable Energy Authority is deafening by their silence, when their signature project of prime national importance has been sabotaged, and now even the performance of the already installed systems are being curtailed.
This action is totally unbelievable when the use of expensive oil-based generation will continue unabated, even during the day, when there is so much solar energy already installed. Of course, the age-old excuse will be trotted out, of the non-firm nature of Solar and Wind and problems of grid stability, etc.
Many useful and practical solutions to face the growing issue of how to integrate the essential low cost but variable resources of solar and wind to the grid as an aftermath of the blackout were discussed over a year ago.
But nothing seems to have even been attempted. The most prominent among these was the proposal to add 300 MW of grid scale batteries, as indicated in the already-approved Long Term Electricity Generation Plan ( LTEGP 2024 – 2044,) of which 100 MW should have been in use by 2026. The tender for the addition of 16 X 10 MW battery storage at selected grid substations was called over a year ago. Some expectation of sanity
It is under these circumstances that the PUCSL called for a stakeholder consultation on the 10th April, 2026, after circulating a concept note, which was well attended. It was a breath of fresh air, in view of the downhill slide of the entire electricity sector in the recent months compounded by the raging controversy of the coal scam and the rapidly increased use of expensive diesel, in addition to the other fossil fuels, just to keep up the generation to match the demand. The double whammy of the doubling of the fuel prices , exacerbated the hit on not only the consumer’s monthly bill, but the national economy and balance of payments.
Therefore, it was most encouraging to note from the PUCSL’s concept note that sanity has prevailed at last. We have been demandin–g some concrete strategies and time based targets to rid at least the electricity sector from the use of expensive, polluting fossil fuels, commencing with oil. This is the only means by which the utility could hope to achieve some degree of economic and financial viability. They have continued to burden the consumer and the country by continually jacking up the consumer tariff, while ignoring any prudent means to clean up their Act. As a matter of interest, the CEB’s own data of 2023 shows that it is possible to save some Rs 113 Billion annually by replacing all oil-based generation using renewables. The country could have saved over $ 700 Million in Foreign Exchange and the Consumer Tariff could have been lowered by Rs 7.00 per Unit across all segments of consumers.
Therefore, the PUCSL concept paper out lines, some credible measures to eliminate the use of all of forms of oil for power generation in stages. The three tier of approach, outlined as option 1 to 3, reproduced here, should be commended for adopting a pragmatic approach, with very good chance of success.
Proposed options by PUCSL
(See Options 1 Peak Shaving Approach by 2027 and Option 2: Eliminating 2.06 GWh/day of diesel-based generation)
Considering even the recent past when we achieved a status of zero oil use, as compared to the present sorry status, this is not an extremely difficult task. We will have to substitute Solar PV to bridge the gap of reduced Hydro during dry months.
(See diagram 1)
RE Contribution 69% % Oil Usage 6.2 % No Diesel
(See diagram 2)
In Contrast on 30th March RE Contribution was only -43,5%
and oil use has gone up to -29.59%
However, as outlined in the introductory paragraphs of the concept paper, the driving force to promote this change is the early declaration of appropriately worked out tariffs for installation of storage batteries and delivery of the stored energy to the grid.
With the total lack of progress of proposals in the LTEGP 2025-2044 by the state institutions, it is prudent to assume any future initiatives can only come from private sector participation.
Using the power granted by the recently ratified Electricity Act NO, 36 (As amended) the PUCSL has moved with commendable speed to develop the Feed in Tariff declarations needed to enable the achievement of the above objectives and a further stakeholder consultation was held on the 24th of April when more detailed proposals were put forward.
However, although the responsibility of publishing the tariff remains with the PUCSL, unless the National System Operator ( NSO ), tasked with the planning and implementation of Electricity Sector developments , takes urgent action to implement the desired changes as a highest priority task, nothing will be gained to help the country to get out of this quagmire.
The Consumer Continues to be Burdened.
Further, as the time table proposed by the PUCSL itself indicates, even the first of the options can be implemented only in 2027, with the others following up to the year 2030.
These are very encouraging time targets and the consumers will eagerly await their achievement.
However, the threat of power cuts, as well as continuing increase in consumer tariff to fuel the use of diesel for power generation, is real and current. A further tariff increase of 18% has been demanded by the NSO, on top of the 15% granted on 1st April, 2026.
The Immediate Options Available to Consumers.
a) The CEB now refuses to provide any grid connection for integration of any rooftop solar PV systems under the Surya Bala Sangraamaya.
b) The only way available to the consumers is to install Off grid roof top solar systems with adequate batteries to be none dependent on the grid. Use the grid only during the off peak hours.
c) During most periods of the year, even under cloudy conditions there is some solar generation. To ensure the daily consumption is more than covered by the solar input and any surplus is used to charge the battery, to the level adequate to manage the evening and peak hour demand, the capacity of the solar panels and battery have to be determined.
d) It is to be noted that although only the relatively high-end domestic consumers could find the proposed scheme financially feasible under the present cost regimes, which will improve further when the second tariff increase is announced shortly, to those consuming over 250 Units/Month, their engagement has a sector wise positive implication which is beneficial to all levels of consumers.
e) The scheme will operate in an off grid mode, without exports to the grid at any time. Therefore, they will not contribute to the often voiced worries of over voltage, instability and variability in the national grid.
f) Once the PUCSL announces the required FIT and the NSO or the Distribution Companies institutes the necessary facilities, such as smart meters, such consumers, too, can further assist the grid by export of any excess they generate.
Proposal to Avoid Power Cuts Implementable by Domestic Consumers
There are several drivers which will attract the potential ” Prosumers” to adopt this option without delay.
* The consumer tariff will continue to rise
* Even the former Roof Top Solar Systems, without batteries, does not provide power during the power cuts or blackouts
* At present day prices, the investment is financially feasible, based on the savings of the current level of monthly electricity bill. A substantial bank loan can be comfortably settled from the savings
* Now cooking with electricity is no longer a financial burden but can save one from the cost and danger of LPG shortages and queues
* What you, do based on your economic ability, will be a service to all consumers as the resultant reduction of Peak Demand means the use of Diesel can be gradually reduced and the lower end consumers, too, will benefit.
* You will enhance your green credentials with your own financial benefits.
The overall benefit to the grid and other consumers
If the element of exorbitant cost of diesel-based generation is removed then there is no need for the increase of consumer tariff for all consumers.
What is more important is that trimming the peak load would drastically reduce the need for any power shredding that is happening on the sly now and thereby benefit all consumers,
The summary of Financial Analysis illustrating the viability based on currently available data is given here. This will improve drastically if a further increase in consumer tariff is granted, which appears inevitable. (See Table 01 – The basic data used for this analysis is available on request.)
by Eng Parakrama Jayasinghe
parajayasinghe@gmail.com
Features
From Coal to Solar: China’s sunken mines power a Green Revolution: Lessons for Sri Lanka
In a striking symbol of the global energy transition, vast stretches of once-abandoned coal mines in China have been reborn, not as relics of an industrial past, but as shimmering hubs of renewable energy.
What were once scarred landscapes, destabilised by years of mining, and later submerged by landslides and floods, have now been transformed into expansive artificial lakes.
Floating atop these waters are some of the world’s largest solar power installations, quietly generating clean electricity on a massive scale.
Among the most notable are the Fuyang Floating Solar Farm and the Huainan Floating Solar Farm. Together, they represent a remarkable engineering and environmental achievement.
The Fuyang facility boasts an installed capacity of 650 megawatts, producing approximately 700 million kilowatt-hours of electricity annually. Even more impressive, the Huainan project reaches a staggering 1 gigawatt capacity, generating nearly 1.8 billion kilowatt-hours each year. Combined, these floating giants produce enough electricity to power millions of homes without burning a single lump of coal.
A former General Manager of the Ceylon Electricity Board (CEB), a veteran electrical engineer, described the development as “a glimpse into the future of energy systems.”
“What China has demonstrated is not just technological capability, but strategic foresight. Turning environmentally degraded land into clean energy assets is the kind of thinking countries like Sri Lanka must begin to adopt,” he said.
Why solar on water?
Floating solar, or “floatovoltaics,” offers a range of advantages that traditional land-based solar farms cannot easily match.
Water naturally cools solar panels, improving their efficiency by an estimated 10 to 15 percent. In hot climates, this cooling effect can significantly boost electricity generation.
Additionally, the panels reduce water evaporation, a crucial benefit in regions facing water stress. By limiting sunlight penetration, they also help suppress algae growth, improving water quality.
Perhaps, most importantly, floating solar eliminates the need for large tracts of land. In densely populated or agriculture-dependent countries, this is a game changer.
A dual economy: Fish and power
In an innovative twist, some of these floating solar farms incorporate aquaculture beneath the panels. Known as the “fisheries + solar” model, it allows communities to cultivate fish in the shaded waters below, creating a dual-income system, energy production above, food production below.
This integrated approach not only maximises resource use but also supports local livelihoods, blending sustainability with economic resilience.
Environmental dividends
The environmental benefits are substantial. The Fuyang project alone reduces carbon dioxide emissions by an estimated 580,000 tons annually, while the Huainan facility cuts emissions by around 1.6 million tons each year.
Beyond emissions, these projects reclaim landscapes once deemed unusable—areas heavily damaged by coal extraction. In doing so, they rewrite the narrative of industrial decline into one of ecological restoration and innovation.
Sri Lanka: A nation poised for floating solar For Sri Lanka, the implications are profound.
Unlike China’s abandoned coal pits, Sri Lanka possesses thousands of irrigation tanks, reservoirs, and hydropower catchments that could serve as ideal platforms for floating solar. From the ancient tank systems of the dry zone to major reservoirs like Victoria Dam and Randenigala Reservoir, the country holds untapped potential to generate clean electricity without sacrificing precious land.
The country’s reliance on thermal power, particularly during drought periods when hydropower declines—has long been a challenge. Floating solar could provide a stabilising solution, reducing dependence on costly fossil fuels while complementing existing hydroelectric infrastructure.
Energy analysts note that integrating floating solar with hydropower reservoirs can create a hybrid system: solar power during the day, hydropower balancing supply at night. This synergy enhances grid stability and reduces overall generation costs.
The former CEB official stressed the urgency:
“Sri Lanka cannot afford to delay. With rising energy demand and climate pressures, we must explore every viable renewable option. Floating solar on our reservoirs is one of the most practical and scalable solutions available.”
Challenges and the road ahead
However, experts caution that careful planning is essential. Environmental assessments, grid integration, and financing mechanisms must be properly addressed. Community engagement, especially where fisheries are involved—will also be key.
Yet the blueprint already exists.
China’s transformation of submerged coal mines into renewable energy hubs offers more than inspiration—it provides a working model. For Sri Lanka, adapting that model to its own geography could mark a decisive step toward energy independence.
China’s floating solar farms stand today as one of the clearest symbols of a world in transition—from fossil fuels to renewables, from environmental degradation to restoration.
For Sri Lanka, the message is equally clear: the future of energy may not lie on land alone—but on water, where sunlight meets innovation.
If harnessed wisely, Sri Lanka’s vast network of reservoirs could one day mirror that transformation, turning calm waters into engines of sustainable growth.
by Ifham Nizam
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