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Solution to water deficit in NWP and NCP

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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).

 

 



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Opinion

Utilizing Eppawela phosphate in time for next Maha not realistic

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A news item in the Sunday Island of May 19,2024 titled “Agriculture Dept. recommends Eppawala Single Super Phosphate over imported TSP for paddy and other crops” caught my eye as I long served the Department of Agriculture. This is because naturally occurring Eppawala Rock Phosphate (ERP) has remained unutilized to any appreciable extent, other than as rock phosphate itself, since time immemorial. It was heartening for me as an agriculturist to see this news item as I knew for sure that large quantities of single super phosphate (SSP) and triple super phosphate (TSP) fertilizers were being imported into Sri Lanka.

All these years much has been discussed about this massive mineral resource and lot of research work has also been done on it. Mostly due to inaction at the policy making level, Sri Lanka continued to import large quantities of phosphate fertlizers at great cost until that infamous ban which has since been lifted.

The aforesaid news item had been based on the proceedings of a meeting chaired by the Minister of Agriculture and Plantation Industries where the domestic production of SSP using ERP had been discussed. Reportedly it had transpired that USD 30 million is spent annually on importing TSP, while the ERP mineral resource holds 60 million tons of phosphate.

It was also reported that “eight private sector manufacturers have commenced large scale production of SSP using ERP.” In the light of the proceedings at the meeting, the minister had noted that plans are under way to implement the use of the SSP fertilizer from the Maha 2024/25 cultivation season and had directed the National Fertilizer Secretariat (NFS) and the two state owned fertilizer companies, Lanka Fertilizer Co. and the Commercial Fertilizer Co., to initiate an outreach program for this purpose.

As this was really encouraging news, I thought it is best to make inquiries from those who know about the present ground situation regarding local production of SSP at Eppawala. I had a hunch that it could be far fetched to project that this production volume could be sufficient to commence an outreach program as early as Maha 2024/25, as decided at that meeting.

My inquiries from reliable professional sources revealed that some small scale manufacturers are currently producing SSP at Eppawala from ERP. But the quantities are small and the quality of the product is doubtful as the process of treatment of the material with sulphuric acid for its conversion to SSP is not being carried out in the expected manner. In this process, “non-soluble fluoraptite (the mineral present within phosphate rock) reacts with sulphuric acid to produce soluble mono-calcium phosphate and calcium sulphate. This makes the phosphate in ERP, available for absorption by the plant roots. Properly manufactured SSP has phosphorus (nine to 10 %), sulphur (11 to 12%) and calcium (20%).

Without going into further detail, let me say that I want to highlight the fact we are yet far away from meeting the phosphate fertilizer needs locally using the massive Eppawela resource. Certainly, starting to meet this need from Maha 2024/25 season is an unachievable dream.

For something realistic to happen, the process of conversion of ERP to SSP has to be systematically and scientifically carried out on a sufficient scale with appropriate quality standards. At present this is totally lacking at Eppawala, according to reliable sources. As this is known technology, getting the job done should pose no problem. Also, small scale production may not fit as the requirement of SSP is significant and large scale production by fertilizer manufacturers with capacity will be necessary.

However better late than never. There should be a realistic plan of action to meet this priority need and till then high level meetings like the one reported are of no avail.

A. BEDGAR PERERA
Retired Director/Agricultural Development,
Ministry of Agriculture
Email < bedgarperera@gmail.com

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Opinion

In favour of ‘thoughtfulness’

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As KT has enunciated, all human progress is indebted to people who observed, experimented, invented, created and above all used their imagination with hardly any guidance from mindfulness gurus. Billions of people have lived and contributed to shape the world to what it is today – of course, with all its beauty as well as ugliness- the latter resulting from dogma, stultified mindsets and navel-gazing. What it takes to enhance the beautiful side of the world is to rely on more thought, more reasoning and more judgment.

by Susantha Hewa

Prof. Kirthi Tennakone’s (KT) article, “Thoughtfulness or mindfulness?”, which appeared in The Island of June 5, 2024, would surely appeal to those who are more “thoughtful” than “mindful”, the former indicating a mind functioning naturally with all cognitive faculties fully awake and the latter indicating a mind being turned inwards and focusing on one’s thoughts, sensations and feelings in a nonjudgmental mode. As KT claims, “Almost all human accomplishments are consequences of thoughtfulness”, thoughtfulness indicating the quality of a sharp mind registering all relevant facts and assessing them for their worth and relevance.

His article itself is a fine demonstration of thoughtfulness rather than of mindfulness, as all discerning minds may agree. Even the gurus of mindfulness have to deal with many thoughts simultaneously as they write or speak, if they wish to make sense, and that is more of an exercise of “thoughtfulness” requiring several skills including organising, reason, elaboration, clarity, critical thinking, analysis, judgment, etc., than one of “mindfulness”, which is said to be focusing on one’s feelings and thoughts without judgment, from moment to moment.

According to the Cambridge Dictionary, thoughtfulness is 1) the state of thinking carefully about something, 2) the quality of being kind and thinking about other people’s needs, and 3) the quality of thinking carefully about how to do something so that it is effective. All these three meanings are to do with using one’s mind to its fullest capacity. And, as the second one indicates, it also includes being considerate towards others, which is directing your mind outwards- which is not involved in mindfulness in the sense in which it is popularly used to describe “the practice of being aware of your body, mind, and feelings in the present moment, thought to create a feeling of calm” (Cambridge Dictionary).

The products of thoughtfulness are there for everybody to see, as KT has clearly explained and enumerated in his essay. On the other hand, mindfulness seems to thrive on a state of mind that is turned inwards, which is often explained as paying attention to your present thoughts, feelings and sensations nonjudgmentally.

It looks as if we have to wait for centuries to see the wonders of this rather solitary and obscure exercise. The one thing that is clear is that even those who have practiced mindfulness for years on end have to be thoughtful rather than mindful, when they choose to communicate with others with any clarity, either in speech or writing, for the simple reason that the audiences are thoughtful, critical and judgmental, rather than uncritical, meditative and nonjudgmental.

Surely, you have to open your mind to what others are saying – rather than shut it, for any human communication to be meaningful, effective and useful. If mindfulness happened to be the natural mode of the mind, we would be living in a dull and dreary world where everybody would “be ‘mindful’ of their own business”.

A community of people may practice ‘mindfulness’ for a while everyday but it can only be an intermission and not the basic mode of a productive life, which is anchored on what you may call “thoughtfulness”. It would be redundant to illustrate this because KT has done it adequately in his article, which is a product of – no prizes for guessing- thoughtfulness. Just take any activity in our day-to-day life and you will see that thoughtfulness is the indispensable operative mechanism behind each of them. As KT asserts, “Thought could have sinister motives and the only way to eliminate them is through thought itself”. We are yet to know whether mindfulness has played any role in this.

In almost any important or urgent situation, a ‘thoughtful mind’ will score higher than a ‘mindful mind’, if you know what I mean. In the classroom, you are sure to immediately pay the price if you suddenly shift from ‘thoughtfulness’ to ‘mindfulness’. As many of us would remember, our teachers wanted us to have all our faculties functioning when they told us “Sihikalpanawen hitiyoth hondai” (you had better be alert), alertness to be understood as being attentive to what is being discussed- not focusing on your own feelings and thoughts in a nonjudgmental mode.

Sometimes people talk excitedly about ‘practicing mindful driving’ but what they unwittingly mean is exactly ‘thoughtful driving’, if you understand safe driving as heeding the following instructions: “avoid your own distractions, stay vigilant, scan the road for surprises, check the body language of other vehicles, try to anticipate how a situation might evolve, and be ready to react”. This can only remind us of those good teachers’ admonition to be sharp-eyed when in the classroom.

If mindfulness is to be alert to what is going on around you, taking in ‘things’, assessing, judging, etc. exactly as in ‘thoughtfulness’, we wouldn’t need experts telling us that ‘mindfulness’ is a different or a superior game. And, as is obvious, whenever people study, work, play, read, write, research, or do anything requiring cognition and judgement, they would surely be in the ‘thoughtful mode’ rather than in the ‘mindful mode’.

As KT has enunciated, all human progress is indebted to people who observed, experimented, invented, created and above all used their imagination with hardly any guidance from mindfulness gurus. Billions of people have lived and contributed to shape the world to what it is today – of course, with all its beauty as well as ugliness- the latter resulting from dogma, stultified mindsets and navel-gazing. What it takes to enhance the beautiful side of the world is to rely on more thought, more reasoning and more judgment. Indulging in nonjudgmental observation may at best bring temporary calmness to individuals; so would art and music, with even more demonstrable benefits. And, for thought and reason to be functional, minds should be directed outwards rather than inwards.

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Opinion

Change is good: Provided it is for better and not for worse

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Aragalaya

by Jayasri Priyalal

Many Sri Lankans may have joined in commemorating the 2568 years of Buddha Parinirvana with much discourse about the fundamental truth, the core teaching of Buddhism about impermanence, last week. As we all realise the fact, that there is nothing permanent in this world; everything is subject to change. Change is the only permanent constant in the universe. This essay focuses on change from socio, political and economic angle.

Sri Lanka is undergoing its worst ever economic crisis without any hope of getting it into a recovery track soon. There is a clarion call from the masses aspiring for a system change as a springboard towards chalking out a recovery path to overcome the crisis. Yet, no one knows or discusses what that system should be to put in place.

One fact remains as an acceptable analogy. Those who cannot cope with change will never be able to initiate change in any circumstances. This applies to all stakeholders including those who caused and contributed to the current crisis. Fair share of responsibilities falls on the electorate who got carried away with populism engineered by a few; with an ultimate aim of state and regulatory capture for their advantage leaving the country into a dire state grappling with debt. Therefore, capacity and capability to initiate that essential change is absent in the DNA of politicians who deceived their constituents.

This year 2024, is remarkable for those countries where representative democracy functions. Over 2 billion voters are expected to cast their votes at polls. As per predictions in 70% of the elections a change in government is anticipated. Some elections are already over and results are known. In Sri Lanka there are two main elections in the pipeline namely the Presidential and parliamentary polls.  The UK gets ready for polls on 4th July 2024. Change is the campaign theme of the Labour Party led by Sir. Keir Starmer. Chase or change dilemma will be an option for the electorate in the USA to test in upcoming presidential elections in November 2024.

Change and the Chase Countercyclical in Sri Lanka

In the last presidential election in 2019 Sri Lankan electorate rallied with President Gotabaya Rajapaksa giving him an absolute mandate with 6.9 million votes, anticipating a change for the better. It was too late for Sri Lankans to realise that their bet was on the wrong horse.  That change triggered the public to rally towards a chase. People’s power proved greater than those who come and hold political power.

The so-called people’s movement Aragalaya forced the Prime Minister to resign with the ipso facto resignation of the cabinet of ministers. Amongst many wrong doings President Gotabaya Rajapaksa nominated an unelected PM to lead the cabinet without dissolving the parliament with the reluctance to test the pulse of the people to secure the right mandate to govern. Rest is history, and finally the people’s power chased out President Gotabya Rajapaksa culminating the grand achievement of the GoHomeGota campaign. Thereafter, people’s aspiration and hope for a change short lived and shortchanged, widening the mistrust between policy makers and electorate further.

Have we learnt from similar power struggles from the past?

Our present has direct links in many ways to the past. The island nation has been deceived by many egocentric figureheads -as they cannot be named as true patriotic leaders- misjudged the public sentiments and aspirations and surrendered the sovereignty of the country to Colonial Masters. Does history repeat itself? Have we forgotten the bitter lessons learnt from history is what is discussed in the next few paragraphs?

This writer is enthusiastically influenced by the historical knowledge shared by Prof. Raj Somadeva via Neth FM radio and the YouTube programme. Due credit should be given to the Professor for all his extensive historical studies and the efforts to share them with the rest of the Sri Lankans in and outside the country. Prof. Somadeva narrates the stories very well with an appeal to draw parallels to the contemporary political power struggles with a warning not to repeat the past mistakes.

Coronation of Sri Wickrama Rajasinghe, last King of Kandyan Kingdom   1798

Having defeated the British Army battalion sent by the Governor Frederick North badly in 1803, the powerful Kandyan Kingdom fell to the British by 1815. Internal power struggles between the Kandyan elites to capture the throne from the Nayakkar clan paved the way for colonials to step in effortlessly to end the 2300 of historical royal lineage, to govern. Finally, Ceylon became a colony of the British Empire under King Gorge III.

Maha Adikaram Pilimatalawe engineered the coronation of Kannasamy Naidu a nephew of Sri Rajadhi Rajasinghe over the legitimate claimant to the throne Muttusamy. Pilimatalawwe was ambitious of becoming the Kandyan King, worked closely with the British and installed Kannasamy in the throne assuming he can control the King to meet his egoistic goals.

The change he anticipated never happened. Then he conspired to kill the King. Pilimatalawwe and the conspiring gang were beheaded by the King. Pilimatalawwe engineered the change and had to work on a chase and he got eliminated by the person whom he elevated to power.

Power crazy Maha Adikaram installed a weaker character in the throne so that he could overthrow him with the help of the British. The whole strategy backfired ultimately sacrificing the nation on a platter to the British ending a royal lineage of over two millennia.  The miscalculations of those close to political power to serve their selfish needs have ruined many countries bringing in misery, hardship and colossal loss of lives and property to its citizens. The island nation has many such cases throughout its history.

Putting a Wrong Guy in a Critical Position – Are we repeating the same mistake?

Throughout history we Sri Lankans have repeated the same mistake and disrupted the nation’s progress leaving the plight in the hands of outsiders.  Although there aren’t any competing empires in the current context, there are clear indications that the local political expectations are gravitating towards the emerging geo-economic-political centres.

The current political leadership or the conventional thought processes are not spurred with an organic strategic growth trajectory with originality backed thought process. None of the political parties have identified the right causes that led to the current crisis.

Moreover, they are getting ready to deceive the electorate to secure the mandate to govern to continue to repeat ill-conceived policy tools without coming up with viable policy options to break the vicious debt trap. Adage goes on to remind that – right diagnosis is half of the solution. Instead, many are getting ready to prescribe the failed remedies with a strong dosage as prescribed by the defunct cold war institutions. It appears that the healer itself is the disease leaving the patient bewildered and leaving the disease into an uncontrolled debt pandemic. We Sri Lankans need to think locally and act globally and not the other way around. In the absence of original ideas and remedies, local politicians are happy to swallow the bitter medicines prescribed on the basis of diagnoses.

Since Independence the ideology of various political parties were developed based on systems and discourses practiced in other countries introducing a welfarist socio economic system. Now, it has turned towards the aspirations of the emerging geo-economic centres. Sri Lankans need to forge a unique turnaround strategy to serve the best interest of its people, and not to become subjects of other countries.  Therefore, the Sri Lankan electorate needs to collate its political mandate in the hands of a leadership who will change the destiny of the country for the better and not for the worst.

Prisoner’s Dilemma

Colonial masters connived with the power crazy Kandyan elites and captured the last King of Ceylon, Sri Wickrama Rajasinghe, dethroned, imprisoned and deported to India. Once you fast track the historical events, we can extrapolate the current situation drawing many parallels. Unlike in the past, the leaders who mislead and mismanage the future of the nation without any original thinking and being subservient to foreign advice will never be deported. They will be facing a prisoner’s dilemma remaining on the island, having given away ports, harbours, airports and other critical infrastructure to foreigners to manage and own.

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