Connect with us

Opinion

Solution to water deficit in NWP and NCP

Published

on

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).

 

 



Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Opinion

The Wickremesinghe Presidency Response to Dr Mahim Mendis

Published

on

By Anura Gunasekera

All of the great leaders have had one characteristic in common; it was the willingness to confront unequivocally the major anxiety of their people in their time. This, and not much else, is the essence of leadership- J.K. Galbraith.Dr. M.M., through an inexplicable thought process, has seen it fit to classify my writing as – quote- “…. A reflection of a segment of the English-speaking middle class of Sri Lanka, confused and burdened by the state of flux, or the terrible uncertainty that engulfs the nation at large. They often confine their criticism to private gatherings, while a few others express themselves through newspaper columns with hard-hearted sentiments against politicians like Premadasa, whom they love to undermine”- end quote

Firstly, my viewpoints on national issues have been exposed in the public domain, through newspaper articles, fairly frequently across the last couple of decades. I cannot quite understand what he means when he says, “members if this social class, going by the contents of Mr. Gunasekera’s column, never believed in ousting Rajapaksas or Wickremesinghe, as they easily embrace the status quo”. To clarify, I have been a steadfast critic of the odious status quo that successive Rajapaksa regimes have represented since the day Mahinda Rajapaksa was first elected President, and I maintain that position to this day. I can also state with total confidence that I represent the viewpoint of a large mass of people, not all of them part of the so-called “English-speaking middle class”. If Dr. MM is in any doubt about my credentials, I suggest that he check out the blog, ‘Rilawala Reflections’, or my medium account – if he can find the time and the inclination.

I do not “resent” (Dr MM’s word) the militant outlook of the university student federations and the other participants of the Aragalaya. It is not possible to confront repression without militancy and steadfastness. But my concern, as an average, law-abiding citizen, was the descent of justifiable civil protest in to violence, particularly after the 9th May. Violence is frequently an outcome of civil protest, the world over, and Sri Lanka was no exception. The occupation of Temple Trees, the President’s house, the Presidential Secretariat and the Prime Minister’s office were unnecessary, and the physical damage caused within those premises, unacceptable. The countrywide damage and destruction of private property was criminal and the murder of two men in Nittambuwa abhorrent, as was the torching of Ranil Wickremesinghe’s house. As far as I am aware, none of the leaders of the Aragalaya, insofar as it has a defined leadership, has publicly condemned those incidents.

Irrespective of the righteousness of the original purpose of the Aragalaya, which I endorse without reservation, those responsible must be made accountable for those crimes. To endorse the Aragalaya unequivocally is to endorse all those unacceptable acts. Dr. MM perceives this position differently. Quote- “Anura Gunasekera has taken the typical position often repeated by the English-speaking elites …”- end quote. The call for law and order is common amongst all right-thinking people and certainly not confined to “elite” groups. If Dr. MM wishes to explore the evolution of my views on the Aragalaya and connected events, I suggest that he reads my articles in The Sunday Island editions of April 11, April 17, April 25, May 15, June 05 and July 17. It is not necessary for me to go in to detail in this writing.

As for the “fatherly advice to these militant youth”, (Dr. MM’s words) let me illustrate my position with a detailed, real-life episode.

In or around 1992, R. Paskaralingam, Secretary of Finance in the R.Premadasa regime, summoned all private company corporate heads and directors, seeking from them a solution to the issue of unemployed graduates. He requested the assembled corporates to provide suitable in-house training, without remuneration, for a minimum period of six months, to make those graduates—in his own words—”employable”. However, Ken Balendra, then Chairman of John Keells, insisted that all trainees be paid and in order to maintain uniformity, it was agreed that each trainee would be paid an allowance of 3,000 per month. Paskaralingam’s ministry supplied around 6,000 names of unemployed graduates to the private companies represented at the meeting. I was present at the first meeting as well as all the meetings which followed.

At the final meeting, six months later, the late Lyn Fernando of the apparel sector submitted the graduate training programme details to Paskaralingam. Of over 4,000 graduates given training appointments, fewer than 10% completed the training programme. On behalf of my company, of which I was then the Head of Human Resources, I interviewed over two dozen candidates and did not employ any, as none of them were prepared to report for training on a Saturday. Exchanging notes then with many of my contemporaries in the private sector, I found that my experience was mirrored right across the sector. The project was a failure entirely due to the reluctance of the greater majority of unemployed graduates, despite being provided with employment opportunity, to conform to the diligence expected by the private sector. Hence, my ‘fatherly advice” to unemployed graduates.

In the last five decades, till retirement in 2020, I have been directly associated, in every organization that I worked in, with Human Resource Management. During this period, I have interviewed thousands of candidates. Therefore, I am fully aware of the issues regarding educational standards, especially in outstation areas, and the difficulties faced by graduates seeking employment. Contrary to Dr MM’s assumption, I speak with reasonable awareness and knowledge of the relevant issues, especially from the perspective of an employer. My knowledge is derived from direct interaction with every level of employment, from manual workers to senior corporate managers.

My criticism of Sajith Premadasa is not an attempt to undermine him. I have no party affiliations but I have voted at every election since 1977, casting my ballot on the basis of strongly held views on major national issues. I voted for Premadasa at the last presidential election as I considered a Gotabaya presidency abhorrent, for reasons I have explained in detail in other writings which pre-date the Yahapalanaya regime. In this instance, promoting Dullas as opposition to RW was, to me, and to many other people who expected greater things of Premadasa, a great disappointment for a number of reasons.

The rationale behind the promotion of the Dullas candidacy was probably the result of a think-tank deliberation, which, judging by Dr MM’s observations, he himself may have been privy to. Given the content of my article at issue, even without reference to any of my previous writings, it is quite absurd of Dr MM to pose the question, “Is Anura Gunasekera an appeaser of the Ranil-Rajapaksa regime to have a serious grouse with Sajith Premadasa for not accepting the Prime-Ministerial post under Gotabaya?” Frankly, that proposition does not merit debate.

Dullas A has been a Rajapaksa loyalist, which means a Rajapaksa lackey, for over two decades. He was the regular spokesman for Gotabaya Rajapaksa, the most incompetent leader this country has ever had. Until he suddenly developed a conscience and defected from the Rajapaksa ranks- though only when the writing on the wall was clear to all- Dullas endorsed the Gotabaya inspired tax concessions, the money-printing, the organic fertilizer fiat, the sugar scam, the ban on agrochemicals and the 20th Amendment.

In the above context, within a few short weeks after switching a decades- long loyalty, what makes him a better candidate for the presidency than Premadasa? The nation was confronted by the most crucial leadership vacuum since independence and, in my view, Dullas was not a choice. In his writing, Dr MM has detailed many of the issues Premadasa has been involved in, and the initiatives he has launched, as an Opposition leader. But that is exactly what an Opposition leader is expected to do. Weighted speeches and impressive rhetoric in parliament and at other forums are, at best, poor substitutes for concrete action at opportune moments. The ground reality, as far as I am concerned, is that he has faltered twice when confronted with the final hurdle. Ordinary citizens like me are not privy to what goes on in the minds of our leaders. We only see the results and, obviously, weigh those against our expectations and arrive at our conclusions. Sajith cannot expect to win by lying low, limiting his profile and interminably biding his time. In the words of another great crisis manager, “The nation will find it very hard to look up to leaders, who are keeping their ears to the ground.” ( Winston Churchill)

Dr MM’s writing suggests a preoccupation with the segment of our society which he labels as the “English-speaking middle class” and, in a sweeping generalisation, attributes to this group all manner of socio-political and ideological inadequacies. There is also a confusing reference, seemingly irrelevant to the context, “to those who have proved that they have not read any decent books in their own libraries.” As for me, although I now habitually write in English, I am quite fluent in Sinhala and reasonably so in Tamil. I also, calculatedly, seek the views of all linguistic groups in the country and many of my views are informed by such discussions.

I understand Dr. MM’s compulsion to reinforce his leader’s position and I respect his views, whilst holding firmly to mine. As for Sajith Premadasa, I pray, on behalf of a nation desperately in need of a viable leadership option in troubled times, that before long he is presented with that perfect opportunity he is awaiting. If it comes to a people’s ballot Sajith is assured of mine.

Dr MM has concluded his writing with a quotation on the “significance of compromise in politics,” attributed to Kevin Spacey, American actor and film producer, currently embroiled in a major sexual misconduct controversy. Let me conclude mine with a quote, attributed to another American, celebrated for genuine greatness; “Nearly all men can stand adversity but if you want to test a man’s character, give him power”- Abraham Lincoln.

Continue Reading

Opinion

The Chinese Ship; enough is enough of protest marches

Published

on

The most pressing occurrence of now is the arrival of the Chinese ship Yuan Wang 5 with sophisticated scientific/astronomical/electronic equipment, which is said to be able to study satellites spinning around in outer space. What is not said is its other capabilities like monitoring electronic communication, etc. It was to arrive on 11th and depart on 17th this month.

Hence India’s howls of protest about its docking in the Hambantota Harbour. Sri Lanka placated it with the sop of postponing the arrival. There is a world of difference between postponement and cancellation/dis-allowing. Even a Grade 5 student should know that. Not our big bugs in the Foreign Ministry. In the first place, did the Ministers of Shipping and Defense grant permission for the ship to enter our waters and the harbour down South or did China not bother to seek permission having a 99 year lease over the harbour? Debt-trap tactics. The ship’s claim for docking is merely to ‘replenish and refuel’. Surely, such a high-tech sailing lab would want to do more. Thus, India’s justified concern, which is “the possibility of the ship’s tracking systems attempting to snoop on Indian installations while being on its way” and over here for seven whole days.

Neighbour or Friend

The last thing poor, bankrupt, battered and shattered Pearl of the Indian Ocean needs is a international scuffle in its waters or over its head. Experts from various fields have spoken about this; written about it and novice Cassandra cannot analyse the problem nor deal with it expertly. But she has a very definite opinion or two as to who or which country Sri Lanka should be more loyal to. Her answer is: Who do you feel more loyal and obliged to – your friendly neighbour or your friend? We are on the doorstep of India and she is our Big Brother – or Big Sister – no two words about that. We are closely linked to her racially: Aryan and Dravidian descent; culturally with close relations forged from long long ago; we were given the teachings of the greatest Asian who lived and preached in India. And during our recent troubles, the worst crisis Sri Lanka has faced, India was the one country who came fast and substantially to our aid and actually saved us from anarchy when fuel ran dry, paralysing the country.

China is rather disapproved of by the likes of Cassandra since that great country, in its drive for its Belt and Road Initiative, acceded to our Prez of then, MR, consumed with egotistic hubris and accommodated his grandiose Oxymandias non-productive buildings getting us into colossal debt. China of decades ago with Chou en Lai, Deputy Head, helped us very much: first with the Rubber-Rice Pact (1952) and thereafter fostering close relations and supporting us in international forums; also gifting us a magnificent conference hall – the BMICH.

Of course, it will require absolute tact and finesse to balance the two almost super powers and also very cleverly but subtly, consider first and last Sri Lanka’s interests and welfare. Cass feels that our Minister of Foreign Affairs – Ali Sabry – is equal to the mighty task of maintaining balance and exertion of Sri Lanka’s rights too. No better person really in appearance, tongue, manners and keen reasoning intellect.

Enough is more than enough!

Cassandra refers here to the protests – marching or standing, but all shouting, nay blasting forth slogans, the women shrilly. Most look rather wild, individually and collectively. Now, protests are past their date; passé, boring, and actually to be looked askance at, if not disdainfully. What are they shouting about? ‘Pointless to shout ‘Go Home Ranil’, though some called him by his second given surname. He should, for goodness sake, not live up to that name. Friendship and back-scratching have their place but not in Sri Lanka of now, so perilously poised. Additionally, absurd and most unrealistic to call for an instant general election and Cass supposes THE Prez election too since a new constitution has not come into force with no Exec Prez for this country. There they were, the men hairy and angry faced. Much energy, much steam wasted along with the day – 9 August. None want a commemoration on the 9th of each month; May 9 was bad enough and the two following with all the destruction that was caused along with protests.

Cass did not spy the Field Marshall with a ragtag of protesters as he promised. She is sure he will be congratulated by most on his restraint and not breaking ranks with the SJB. We want him to remain the admired and respected foremost war hero.So was this 9th a bit of a pusswedilla? Hope the igniters get the message and drop their country disturbing protests even though HR organisations back them. Utterly pointless and senseless now. Let the government, good or bad, work hard and unhindered by civil disturbances to at least get on the path of economic recovery. Political recovery and punishing of the political mega-corrupt can come later.

Thus, our repeated advice: Stalin and other like leaders, stop parading the streets with conscripted teachers and firebrands who know no better and return to your career if not vocation. (Pedagogy not protest marching and demanding unreasonably.) If you no longer are a teacher, then get teachers who are members of the trade unions you lead to be better teachers – dedicated to their pedagogy; kind and tolerant to their students and considerate to parents.

Damitha Abeyratne, who looked victorious when released from remand on bail, just go back to your acting and film career, that’s if you still have that option. University students go back to lectures, sit and pass your exams and come serve your country in jobs instead of giving vent to your hooliganism pretending nationalistic pride and loyalty.

Trump at receiving end

The FBI searched Donald Trump’s Mar-a-Largo residence in Florida on Monday August 8 and even prised open a safe from which they got government papers which Trump took with him when he was made to leave the White House after he lost the presidency to Biden. Retrieved were sensitive classified government documents in his possession. Trump accused the FBI of an unannounced search and the Democrats of a witch hunt. But what an outsider feels is if he did wrong he has to pay for it. Trump is actually going to pay for his sins committed as an ego-centric, obstinate president of the US. He is getting his just deserts and after not much long since alleged crimes were committed.

Protesters shout the government should bring back stolen wealth. This shout is justified but not now; later when a firm government is in place with the economy of the country guided to stand on a surer footing.

Belated commendation

The protesters who found a big bundle of cash in the President’s House and handed it over to the police need to be congratulated and patted on their backs since they could so easily have spirited it away and shared the loot. We disapprove of their invading official VIP residences and offices, but this act must be commended. It is in sharp contrast to the grossness of sleeping on beds and diving into the pool at President’s House.

Continue Reading

Opinion

Sunil, your slip is showing!

Published

on

It is rarely that veteran JVPer Sunil Handunetti leaves room for criticism. Perhaps, the JVP’S refusal to join the proposed all-party government had to be explained by a senior respected member – Handunetti being the obvious choice.

To an independent observer, he did not fare in a recent interview. Quite innocently, he trotted out a very puerile explanation, which could, perhaps, be applauded by school-going children in the lower grades. The tendency to be jealous, inability to appreciate the good, even in a bad situation, and the unwillingness to give credit where credit is due, coupled with age-old theoretical bug-bears and prejudices , perhaps, provoked him to quote trivialities; such as President Ranil W is on a journey to consolidate his Party and to gain kudos as the saviour of the Nation.

This exposes himself and his JVP as anti-national and narrow-minded in a situation where the country is now at its lowest depths, where everyone is expected to put his or her shoulder to the wheel. It comes ill from a JVPer who has proved himself as a useful and capable politician, and a member of a party that actively and gleefully participated in the notorious FCID outfit, organized by the then PM, Ranil W.

What a world!

I.P.C. MENDIS

Continue Reading

Trending