Opinion
Solution to water deficit in NWP and NCP
by BANDULA KENDARAGAMA
Former Section Engineer (Dam), Kothmale Hydro-Power Project and International Dams Consultant, Melbourne, Australia
(Based on an interview with Srilal D. Perera (Construction Project Manager), Melbourne, Australia)
Sri Lanka is now a middle-income country with consistently high economic growth over the recent years. The government’s public investment plans include several development plans and projects for the coming years, to further accelerate economic growth and promote social and human development.
Being a tropical island located close to the equator, Sri Lanka is highly susceptible to adverse effects of climate change. The Global Climate Risk Index (CRI) 2018, which indicates how countries have been affected by the impacts of weather-related loss events (storms, floods, earthquakes, heat waves etc.,) ranks Sri Lanka as the fourth among the most affected countries of the world. This is an alarming situation. Adverse effects of climate change are evident from the severe and long duration droughts as well as severe flooding occurring almost every year in several parts of the country. Water availability is becoming more variable and uncertain, even as demand for bulk water supplies for agriculture, new industries and tourism and clean water for drinking increases. Studies confirm that these impacts are likely to exacerbate, and the wetter areas of the country would eventually become wetter, and the drier areas drier and drier.
The government of Sri Lanka has taken steps to address these challenges with the successful completion and commissioning of Moragahakanda and Kalu Ganga reservoirs, and the ongoing and planned construction of dams and associated feeder canals, hydraulic facilities, Hydro Power enhancements to comply with Paris Convention that His Excellency the President of Sri Lanka has consented under renewable energy promotion in Sri Lanka; as well as, other water resources development investments envisaged under the Public Investment Plan (PIP). The Government is also implementing several other programs and investments to mitigate flooding and flood damages in several river basins which are vulnerable to flooding.
Planning and investments in additional water storages, and transfer infrastructure to transfer water from water surplus river basins of the wet zone to water deficit river basins, will be a major priority to meet the growing demands and challenges of climate change impacts. Additional investments will be required on a priority basis for developing water resources to provide potable water supplies to people and areas currently affected by chronic kidney disease.
These new investments on water resources will demand diligent planning, protection, management and allocation of water for multiple uses and users within river basin context. As the water infrastructure expands through additional infrastructure bringing water to water deficit geographic areas, to new and current groups of farmers, large and small industries, urban and rural drinking water consumers, mechanisms will be required for diligent planning, allocation, and monitoring of bulk water supplies from the major water conveyance systems beyond the mandate and the role played by the existing Water Management Secretariat (WMS) of the Mahaweli Authority of Sri Lanka (MASL).
The Project
With the present climatic uncertainty, North Western Province (NWP) and the North Central Province (NCP) are among the most affected areas without reliable supply of water for irrigation, about 40,000 ha, and ensuring domestic water supply to families in such provinces. Major diversions of this water are supplied through the Polgolla tunnel (875 Million Cubic Meters (MCM) / Year) for both the seasons of Yala and Maha. This volume of diversion is entirely depending on the storage above the Polgolla barrage. At present only the Kotmale reservoir with 174 MCM supports to regulate this water. However, the Polgolla tunnel is functioned only with 60% of its capacity, and the tunnel has additional capacity to divert around 400 MCM / Year, if the upstream storage is available.
Therefore, a proposal for increasing the height of the Kotmale dam to increase the retention capacity by additional 250 MCM would be one of the feasible proposals to solve the water deficits in NWP and NCP. Also, the increased head and volume would boost the hydro-power generation by about 20%, once the supplementary water starts to pass through Kotmale and Ukuwela power stations.
The Kotmale Hydropower Project was one of the first projects taken up under the Accelerated Mahaweli Development Program (AMDP). It was the most upstream among those headworks in the Mahaweli river basin, and exploited the hydropower potential of Kotmale Oya, a major right bank tributary of the Mahaweli Ganga. The Kotmale dam site is at Kadadora, located about 6.6km upstream of the confluence of Kotmale Oya with Mahaweli Ganga, where the river forms a narrow and deep valley with steep banks. The powerhouse is underground and situated in the belly of the Atabage mountains, about 6.4km downstream of the Kotmale Oya – Mahaweli Ganga confluence.
The basic elements of the Kotmale Hydro-Power Project are a concrete face rockfill dam (87m high and 600m long) having the active storage capacity of 174 MCM and a tunnel system leading to 201MW power plants with outfall to the Mahaweli Ganga. The primary function is the generation of electric power. Additional benefits arise from an increase in the amount of irrigation water available at the Polgolla diversion, as well as mitigation of floods in the Gampola area as a result of the regulation of flows in the Kotmale Oya. The Project construction work commenced in 1979 and was completed in 1985, with financial assistance provided by the Government of Sweden.
The dam has been provided with basic facilities for future rising, to three alternative levels 715m, 725m and to 735m above the sea level (capacity of 370 MCM at 728m FSL). The provision for the extension of foundation from the downstream face, and the land around the reservoir rim up to 735 m elevation, have already been acquired since the beginning to enable the future upgrading.
However, the raising of Kotmale dam would be an engineering challenge and need in depth study to check the stability of the Concrete Face Rockfill Dam (CFRD), during and after construction, instrumentation, reliability of foundation and geology, supplementary grout curtain, spill gates and chute with elevated ogee (Flip bucket), added pressure head to tunnels, height of the surge shaft and power station equipment etc., Also, the heightening of the dam shall not affect the ongoing annual supply of water to NCP, as it would generate critical social problems and, therefore, the live construction method statement with the active storage of water available for downstream use would be the most practical approach.
Therefore, a comprehensive feasibility study shall be originated to find a solution for the critical water deficit in NWP and NCP, and for harnessing addition of renewable energy, considering above referred to facts at earliest possible.
The original consultant of this project was Sir William Halcrow & Partners (Halcrow Water) of the United Kingdom (UK); and Skanska (Sweden) with joint collaboration of Central Engineering Consultancy Bureau (CECB) , then local Consultant to the Mahaweli Ministry, had been involved in a preliminary feasibility study, the project design and supervisions during the first construction phase of this development in the year 1979 to 1984 period. Hence, the re-engagement of previously involved qualified consultants would be highly recommended for future studies and development, as well as the previous data, knowhow and experience that retained with them would be essential for accomplishing this challenging task.
In addition, consideration should be given to appointing a Panel of Experts from local & overseas professional bodies, who have extensive knowledge and experience in CFRDs, gates and valves, geology, geotechnical engineering, instrumentation and dam safety.
Consideration should be given to employing a minimum number of expatriate engineers and a maximum number of local engineers.
Recommendations
Following studies are needed to execute to enhance the project more feasible to meet the challenges in climate change, and the supply of more renewable hydro-energy, especially from the power plants newly built in Mahaweli Basin from the Kelani water.
1. Raising Kotmale Dam (15, 25, 30m). Note all lands are already acquired and there is no social impact;
2. Check the possibility of building dams at locations 11, 12, 14 etc., in Master Plan above Polgolla near Ginigathhena (Koladeniya, Carolina, Trapalga, Rosalla, to increase the retention above Polgolla, as the water about 1,000 MCM / Year is spilling down Polgolla during flood;
3. Enhance the capacity of Kandalama-Huruluwewa Canal to carry about 200 MCM / Year, at a rate of 10m3/second;
4. Built a new tunnel from Bowatenna Reservoir to Dambulu Oya where the capacity is 30m3/second. This would enhance the deficit of water in NWP (150 MCM / Year) and the water need in Anuradhapura;
5. Expand the capacity of power generation in Ukuwela Powerhouse adding one unit; and
6. Revisit the canal availability from Kalawewa to Nachhaduwa, Tissawewa and Basawakulana etc. via Yoda Ela.
7. A supplementary study to check the availability of water from Kelani Basin to Mahaweli Basin would further enhance this proposal.
The writer has B.Sc. Eng. (Hons), M.Eng. (Structural Engineering & Construction), MASCE, MIE Aust, CPEng NER, APEC Engineer, IntPE(Aus).
Opinion
LSSP @ 90: The Sama Samaja Role in Constitutional Issues
On the occasion of the ninetieth anniversary of the Lanka Sama Samaja Party (LSSP), this article highlights the party’s positions on constitutional matters. When the LSSP was founded, it had two primary objectives: obtaining complete political independence for Sri Lanka and building a socialist society. The first of these was achieved in two stages. The LSSP directly contributed to achieving semi-independence in 1948 through its anti-imperialist struggle and full political independence in 1972. The second objective remains a distant goal.
Citizenship Act
In the very second year after independence, the D. S. Senanayake government acted to deny citizenship to the Hill-Country Tamil community and, consequently, deprived them of voting rights. In the 1947 election, many Hill-Country Tamils—who voted as British subjects—were inclined toward the Left, and especially toward the Sama Samaja Party. In that election, the Ceylon Indian Congress won seven seats, and with the support of plantation workers in areas where they were numerous, several left-wing candidates were also elected.
Seeing the long-term danger in this alliance, the Sri Lankan capitalist class ensured that the Citizenship Act defined the term “citizen” in a way that denied citizenship to hundreds of thousands of Hill-Country Tamil people. As a result, they also lost their voting rights. At that time, it was the Left, led by the Sama Samaja Party, that opposed this.
While the Tamil Congress, a coalition partner of the government at the time, voted in favour of the legislation, S.J.V. Chelvanayakam stated that the inability of Tamil leaders to protect their cousins—the Hill-Country Tamil community—showed that being a partner in a Colombo-based government brought no benefit to minority groups. He argued that the lesson to be learned was the need for self-government in the regions where they lived. Chelvanayakam’s founding of the Federal Party was one consequence of this process.
Although section 29 of the 1947 Constitution purported protection by providing that no law shall make persons of any community or religion liable to disabilities or restrictions to which persons of other communities or religions are not made liable, neither the Supreme Court of Ceylon nor the Privy Council in England, which was then the country’s highest appellate court, afforded any relief to the Hill-Country Tamil community.
Parity of Status for Sinhala and Tamil and the Ethnic Issue
When the UNP and the SLFP, both of which had previously agreed to grant equal status to the Sinhala and Tamil languages, reversed their positions in 1955 and supported making Sinhala the sole official language, the LSSP stood firmly by its policy of parity. Earlier, when a group of Buddhist monks met N. M. Perera and told him they were prepared to make him Prime Minister if he agreed to make Sinhala the only official language, he rejected the proposal. Had the country heeded Colvin R. de Silva’s famous warning— “One language, two countries; two languages, one country”—the separatist war might have been averted. Because the Left refused to be opportunistic, it lost public support.
During the 1956 debate on the Official Language Bill, Panadura LSSP MP Leslie Goonewardene warned: “The possibility of communal riots is not the only danger I am referring to. There is the graver danger of the division of the country; we must remember that the Northern and Eastern provinces of Ceylon are inhabited principally by Tamil-speaking people, and if those people feel that a grave, irreparable injustice is done to them, there is a possibility of their deciding even to break away from the rest of the country. In fact, there is already a section of political opinion among the Tamil-speaking people which is openly advocating the course of action.” It is an irony of history that Sinhala was designated the sole official language in 1956, yet in 1987, both languages were formally recognised as official.
1972 Republican Constitution
Colvin’s contribution to the making of the 1972 Republican Constitution, which severed Sri Lanka’s political ties with Britain, was immense. Preserving the parliamentary system, recognising fundamental rights, and incorporating directive principles of state policy that supported social justice were further achievements of that Constitution. It also had its weaknesses, and any effort to assign full responsibility for them to Colvin must also be addressed.
In the booklet that he wrote on the 1972 Constitution, he said the following regarding the place given to Buddhism: “I believe in a secular state. But you know, when Constitutions are made by Constituent Assemblies, they are not made by the Minister of Constitutional Affairs.” What he meant was that the final outcome reflected the balance of power within the Constituent Assembly. As a contributor to constitution drafting, this writer’s experience confirms that while drafters do have a role, the final outcome on controversial issues depends on the political forces involved and mirrors the resultant of those forces.
In fact, the original proposal approved by the Constituent Assembly was that Buddhism should be given its “rightful place” as the religion of the majority. However, the subcommittee on religion, chaired by Prime Minister Sirimavo Bandaranaike, changed this to “foremost place.” It is believed that her view was influenced by the fact that one of her ancestors had signed the 1815 Kandyan Convention, in which Buddhism was declared inviolable, and the British undertook to maintain and protect its rites, ministers, and places of worship.
As Dr Nihal Jayawickrama, a member of the committee that drafted the 1972 Constitution, has written, the original draft prepared by Colvin did not describe Sri Lanka as a unitary state. However, Minister Felix Dias Bandaranaike proposed that the country be declared a “unitary state”. Colvin’s view was that, while the proposed constitution would have a unitary structure, unitary constitutions could vary substantially in form and, therefore, flexibility should be allowed. Nevertheless, the proposed phrase found its way to the final draft. “In the course of time, this impetuous, ill-considered, wholly unnecessary embellishment has reached the proportions of a battle cry of individuals and groups who seek to achieve a homogenous Sinhalese state on this island”, Dr Jayawickrama observed.
Indeed, the failure of the 1972 Constitution to make both Sinhala and Tamil official languages was a defeat for the Left. Allowing the use of Tamil in the courts of the Northern and Eastern Provinces and granting the right to obtain Tamil translations in any court in the country were only small achievements.
Devolution
The original Tamil demand was for constitutionally guaranteed representation in the legislature. Given that, in the early stages, they showed greater willingness to share power at the centre than to pursue regional self-government, it is not surprising that the Left believed that ethnic harmony could be ensured through equality. After the conflict escalated, N. M. Perera, now convinced that regional autonomy was the answer to the conflict, wrote in a collection of essays published a few months before his death: “Unfortunately, by the time the pro-Sinhala leaders hobbled along, the young extremists had taken the lead in demanding a separate State. (…) What might have satisfied the Tamil community twenty years back cannot be adequate twenty years later. Other concessions along the lines of regional autonomy will have to be in the offing if healthy and harmonious relations are to be regained.”
After N. M.’s death, his followers continued to advance the proposal for regional self-government. At the All-Party Conference convened after the painful experiences of July 1983, Colvin declared that the ethnic question was “a problem of the Sri Lanka nation and state and not a problem of just this community or that community.” While reaffirming the LSSP’s position that Sri Lanka must remain a single country with a single state, he emphasised that with Tamils living in considerable numbers in a contiguous territory, the state as presently organised does not serve the purposes it should serve, especially in the field of equality of status in relation to the state, the nation and the government. The Left supported the Thirteenth Amendment in principle. More than 200 leftists, including Vijaya Kumaratunga, paid the price with their lives for doing so, 25 of whom were Samasamajists. The All-Party Representatives Committee appointed by President Mahinda Rajapaksa and chaired by LSSP Minister Tissa Vitharana, proposed extensive devolution of power within an undivided country.
Abolishing the Executive Presidency
It is unsurprising that N. M. Perera, who possessed exceptional knowledge of parliamentary procedure worldwide and was one of the finest parliamentarians, was a staunch defender of the parliamentary system. In his collection of essays on the 1978 Constitution, N. M. noted that the parliamentary form of government had worked for thirty years in Sri Lanka with a degree of success that had surprised many Western observers. Today, that book has become a handbook for advocates of abolishing the executive presidency. The Left has consistently and unwaveringly supported the abolition of the executive presidential system, and the Lanka Sama Samaja Party has contributed significantly to this effort.
The National People’s Power, in its presidential election manifesto, promised a new constitution that would abolish the executive presidency, devolve power to provinces, districts, and local authorities, and grant all communities a share in governance. However, there appears to be no preparation underway to fulfil these promises. It is the duty of the Left to press for their implementation.
In an article published in The Island on June 6 this year, to commemorate N. M. Perera’s 120th birth anniversary, the writer wrote: “The Left may be weaker and fragmented; nevertheless, the relevance and need for a Left alternative persist. If the LSSP can celebrate its 90th anniversary as a reunited party, that could pave the way for a stronger and united Left as well. Such a development would be the best way to honour NM and other pioneering leaders of the Left.” It is encouraging that some discussion on this matter has now emerged. Merely discussing the history of the LSSP and the Left is insufficient; action is required. It is the duty of leftists to disprove Bernard Soysa’s sarcastic remark, “left activists are good at fighting for the crown that does not exist.”
by (Dr) Jayampathy Wickramaratne,
President’s Counsel
Opinion
A harsh reflection of Sri Lanka’s early-warning gap
Cyclone Ditwah:
Cyclone Ditwah, which swept across Sri Lanka at the end of November, caused massive damage to the country, the extent of which need not be mentioned here, as all are aware of it by now. Heated arguments went on among many parties with regard to how this destruction could have been mitigated and who should take responsibility. Although there may have been shortcomings in several aspects of how we responded to Ditwah, this article highlights a critical area that urgently requires attention if we are to protect ourselves from similar hazards in the future.
As is common in many situations, it has once again showcased a concerning weakness in the country’s disaster-management cycle, the gap between issuing early warnings and the expected public response. The Meteorological Department, the Irrigation Department, the National Building Research Organization, and other authorities issued continuous warnings to evacuate well in advance of imminent threats of flooding, landslides, and water hazards. However, the level of preparedness and community reaction fell short, leading to far greater personal property damage, including loss of a few hundred lives.
Sri Lanka is not unfamiliar with natural disasters. One of the most devastating disasters in our history could be considered the 2004 Tsunami event, which resulted in over 35,000 deaths and over $1 billion in property damage in the coastal belt. After the event, the concepts of disaster management were introduced to the country, which we have been adhering to since then. Again in 2016, the country faced massive river flooding, especially in western and southern regions, and until recently experienced repeated floods and landslides due to rains caused by atmospheric disturbances, though less in scale. Each of these events paved the way for relevant authorities to discuss and take appropriate measures on institutional readiness, infrastructure resilience, and public awareness. Yet, Cyclone Ditwah has demonstrated that despite improvements in forecasting and communication, well supported by technological advancements, the translation of warnings into action remains critically weak.
The success of early-warning systems depends on how quickly and effectively the public and relevant institutions respond. In the case of Ditwah, the Department of Meteorology issued warnings several days beforehand, supported by regional cyclone forecasting of neighbouring countries. Other organisations previously mentioned circulated advisories with regard to expected flood risk and possible landslide threats on television, radio, and social media, with continuous updates. All the flood warnings were more than accurate, as low-lying areas were affected by floods with anticipated heights and times. Landslide risks, too, were well-informed for many areas on a larger spatial scale, presumably due to the practical difficulties of identifying such areas on a minor scale, given that micro-topography in hill country is susceptible to localised failures. Hence, the technical side of the early-warning system worked as it should have. However, it is pathetic that the response from the public did not align with the risk communicated in most areas.
In many affected areas, people may have underestimated the severity of the hazard based on their past experiences. In a country where weather hazards are common, some may have treated the warnings as routine messages they hear day by day. As all the warnings do not end up in severe outcomes, some may have disregarded them as futile. In the meantime, there can be yet another segment of the population that did not have adequate knowledge and guidance on what specific actions to take after receiving a warning. This could especially happen if the responsible authorities lack necessary preparedness plans. Whatever the case may be, lapses in response to early warnings magnified the cyclone’s impact.
Enforcing preventive actions by authorities has certain limitations. In some areas, even the police struggled to move people from vulnerable areas owing to community resistance. This could be partly due to a lack of temporary accommodation prepared in advance. In some cases, communities were reluctant to relocate due to concerns over safety, privacy, and the status quo. However, it should be noted that people living in low-lying areas of the Kelani River and Attanagalu Oya had ample time to evacuate with their valuable belongings.
Hazard warnings are technical outputs of various models. For them to be effective, the public must understand them, trust them, and take appropriate action as instructed. This requires continuous community engagement, education, and preparedness training. Sri Lanka must therefore take more actions on community-level disaster preparedness programs. A culture of preparedness is the need of the day, and schools, religious institutions, and community-based organisations can play an important role in making it a reality. Risk communication must be further simplified so that people can easily understand what they should do at different alert levels.
Cyclone Ditwah has left, giving us a strong message. Even an accurate weather forecast and associated hazard warnings cannot save lives or property unless the public responds appropriately. As it is beyond doubt that climate change intensifies the frequency and severity of extreme weather events, people in Sri Lanka have to consider preparedness as a routine part of life and respond to warnings promptly to mitigate damage from future disasters.
(The writer is a chartered Civil Engineer)
by Eng. Thushara Dissanayake
Opinion
Feeling sad and blue?
Here is what you can do!
Comedy and the ability to have a good laugh are what keep us sane. The good news to announce is that there are many British and American comedy shows posted up and available on the internet.
They will bring a few hours of welcome relief from our present doldrums.
Firstly, and in a class of its own, are the many Benny Hill shows. Benny is a British comedian who comes from a circus family, and was brought up in an atmosphere of circus clowning. Each show is carefully polished and rehearsed to get the comedy across and understood successfully. These clips have the most beautiful stage props and settings with suitable, amusing costumes. This is really good comedy for the mature, older viewer.
Benny Hill has produced shows that are “Master-Class” in quality adult entertainment. All his shows are good.
Then comes the “Not the Nine o’clock news” with Rowan Atkinson and his comedy team producing good entertainment suitable for all.
And then comes the “Two Ronnies” – Ronnie Barker and Ronnie Corbett, with their dry sense of humour and wit. Search and you will find other uplifting shows such as Dave Allen, with his monologues and humour.
All these shows have been broadcast in Britain over the last 50 years and are well worth viewing on the Internet.
Similarly, in The USA of America. There are some really great entertainment shows. And never forget Fats Waller in the film “Stormy Weather,” where he was the pianist in the unforgettable, epic, comedy song “Ain’t Misbehavin”. And then there is “Bewitched” with young and glamorous Samantha Stevens and her mother, Endora who can perform magic. It is amazing entertainment! This show, although from the 1970s was a milestone in US light entertainment, along with many more.
And do not overlook Charlie Chaplin and Laurel and Hardy, and all the Disney films. Donald Duck gives us a great wealth of simple comedy.
The US offers you a mountain of comedy and good humour on Youtube. All these shows await you, just by accessing the Internet! The internet channel, ‘You tube’ itself, comes from America! The Americans reach out to you with good, happy things right into your own living room!
Those few people with the ability to understand English have the key to a great- great storehouse of uplifting humour and entertainment. They are rich indeed!
Priyantha Hettige
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