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Most plastic debris on beaches comes from far-off sources

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Lankan plastic debris found on beaches in the Seychelles

Vast amounts of plastic debris accumulate on beaches across the Seychelles and other small island developing states including Sri Lanka, and an observational analysis (for instance, plastic bottle labels) suggest that much of this waste originates from distant sources and not from the islands themselves.

But until now, the likely sources of this debris have not been quantified, says a new study by the University of Oxford.

“Indonesia is the primary source of land-based plastic debris found on beaches in the Seychelles, with major contributions from India and Sri Lanka,” it said.

The study led by the University of Oxford investigated by developing a high-resolution model that simulated the movement of plastic debris across the world’s oceans. This used input data on ocean currents, waves, and winds, and plastic debris entering the ocean from coastal populations, rivers and fisheries, to predict plastic debris accumulation at 27 sites in the Seychelles and wider western Indian ocean. The results have been published in Marine Pollution Bulletin.

The researchers modelled the likely sources of both land-based and marine types of plastic pollution.

Key findings:

• Indonesia is the primary source of land-based plastic debris found on beaches in the Seychelles, with major contributions from India and Sri Lanka. This was particularly the case for medium-large debris that have a high buoyancy (such as bottle caps, sandals, bottles, and small domestic items).

• Plastic debris arriving from Indonesia would have been at sea for at least 6 months, with some exceeding 2 years.

• Smaller plastic debris, such as millimetre-sized plastic fragments and pellets, tended to originate from East Africa and from within the Seychelles itself. Smaller fragments are less buoyant than larger items, and do not travel as far before sinking.

• The Seychelles also accumulate significant amounts of plastic debris of marine origin from fisheries and shipping lanes, such as discarded or lost fishing gear. The large numbers of bottles beaching at these islands with labels suggesting they come from Malaysia, Thailand and, in particular, China, were probably discarded from ships rather than floating from those countries directly. For some islands, a significantly higher proportion of plastic waste comes from marine sources, rather than land.

• Rates of plastic debris accumulation showed a strong seasonal affect. Plastic debris from both land and marine sources was most likely to land on beaches in the Seychelles at the end of the northwest monsoon, with the highest rates in March and April.

• Plastic debris accumulation may also be amplified by El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD, also known as the Indian Niño) events.

This is the first study to produce a quantitative estimate of the sources of plastic debris for the Seychelles and other remote islands in the western Indian Ocean. Such plastic pollution is a significant environmental threat, both for marine ecosystems and the communities that depend on the ocean for food, tourism, and other economic activities. In addition, plastic debris that drifts from far-off sources increases the risk of spreading invasive species and diseases.

A previous study led by University of Oxford researchers estimated that over 500 tonnes of debris had accumulated at Aldabra Atoll in Seychelles, an ecologically valuable UNESCO World Heritage Site with zero permanent population.

Lead author of the current research, Noam Vogt-Vincent (Department of Earth Sciences, University of Oxford), said ‘We have combined observational data from across the Seychelles with cutting-edge computer simulations to generate the most comprehensive predictions currently available for marine litter dispersal in the region. This will provide vital information for local management on these islands — many of which are global biodiversity hotspots — and to inform national and international responses.’

According to the researchers, the results illustrate the sheer scale of the plastic pollution challenge facing small island developing states, and makes the need for a global plastic treaty more urgent than ever. This could include, for instance, greater enforcement of policies that forbid the disposal of fishing gear and other plastics at sea. The findings also build on the ever-growing evidence that investing in waste management systems and implementing policies for waste disposal at the main source nations is the number one action to prevent land-based litter arriving at remote island sites.

Knowing when plastic debris accumulation is likely to peak could help to plan mitigation efforts. For instance, the results suggest that beach clean-ups should take place after peak debris accumulation (i.e. May to June) to reduce the likelihood of plastic debris breaking down into smaller fragments and impacting ecosystems.

Co-author Dr April Burt (Seychelles Islands Foundation and University of Oxford) said: ‘These islands are faced with the deeply inequitable situation of bearing the costs of removing waste they were not responsible for generating, contrary to the “polluter pays” principle. Our study has demonstrated that most of the plastic debris accumulating at these remote islands comes from far-off sources, and this should be the first positive step towards accountability and prevention.’

The study also involved researchers from the University of Montpellier; the Institut de Recherche pour le D’eveloppement, MARBEC; and the Okinawa Institute of Science and Technology



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SJB flays PUCSL for shifting coal scandal losses to electricity consumers

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Sajith Premadasa

Alleging that the Public Utilities Commission of Sri Lanka (PUCSL) has shifted the massive losses, caused by the coal scam, to the hapless public, Opposition and SJB Leader, Sajith Premadasa, has questioned the conduct of the regulator, noting that it is mandated to protect the interests of both the service provider and the consumers.

Premadasa alleged that the PUCSL ignored the representations made by the SJB on behalf of local industries.

Premadasa said that the PUCSL had authorised the latest 18% increase, in response to the request made by the recently established National System Operator (Pvt) Ltd (NSO), on behalf of the NPP government.

The PUCSL was established in terms of the Public Utilities Commission of Sri Lanka Act, No. 35 of 2002. Although the PUCSL was supposed to function as a multi-sector regulator for electricity, water services and petroleum industries, successive governments refrained from bringing water services and petroleum industries under its purview.

The Opposition leader alleged that the PUCSL did the bidding of the government.

Since January this year, PUCSL has increased electricity tariffs on three occasions. The latest came into operation on 11 May.

The PUCSL consists of Prof. K. P. L. Chandralal (Chairman), Engineer Piyal Henanayake (Deputy Chairman), Dr. M.C.S. Fernando, and Lilantha Samaranayake, PhD.

Premadasa said that instead of taking tangible measures to recover the unbearable losses caused by the coal scam, the government burdened the entire country through the PUCSL.

“Don’t forget that the government is shielding its henchmen responsible for the coal scam at the expense of the country,” MP Premadasa said, pointing out that there couldn’t have been any dispute over their culpability, after the National Audit Office (NAO) found fault with the Energy Ministry for granting the tender for the supply of coal for the 2025/2026 season to a company not qualified even to participate in the tender process.

The SJB leader declared that the resignation of Energy Minister, Kumara Jayakody, and its Secretary, Prof. Udayanga Hemapala, in the immediate aftermath of Parliament defeating a no-faith motion against the Minister was meant to protect the ruling party.

The PUCSL has stated that the NSO received Rs 15 bn from the government to grant relief to 95% of the consumers. “How could the PUCSL justify unbearable electricity tariff increases for the remaining 5% of the consumers, knowing very well that it will destabilise key sectors in the economy?” a power sector expert said.

By Shamindra Ferdinando

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Rains bring relief to debt-ridden CEB as reservoirs fill; one dead, 62 families affected by adverse weather

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The widespread torrential rains currently experienced countrywide are expected to provide significant financial relief to the debt-ridden Ceylon Electricity Board (CEB) by sharply increasing hydroelectric power generation and reducing dependence on costly thermal and coal-powered electricity generation, power sector officials said yesterday.

Senior engineers of the CEB told The Island the rapid rise in water levels in major catchment areas and reservoirs had already strengthened hydropower generation capacity across the country.

Officials of the Irrigation Department confirmed that 33 reservoirs are presently spilling following continuous heavy rainfall over several parts of the island.

Among the major reservoirs spilling are Rajanganaya, Lunugamwehera, Weheragala, Deduru Oya, Nalanda and Wemedilla reservoirs, while several spill gates have been opened to release excess water due to heavy inflows into the catchment systems.

An Irrigation Department engineer said catchment areas linked to the Mahaweli, Kala Oya and southern river basins had received exceptionally heavy rainfall over the past several days.

“The inflows are extremely high. Reservoir capacities are increasing rapidly and this is highly beneficial for irrigation, water supply and hydroelectric generation,” the official said.

CEB engineers explained that the increase in reservoir storage levels would enable the Board to maximise hydroelectricity generation from major hydropower stations linked to the Mahaweli and Laxapana systems.

A senior CEB engineer said hydropower remained the cheapest electricity source available to Sri Lanka.

“Hydro generation costs are minimal compared to thermal generation. Once reservoirs fill up, we can considerably reduce expensive oil-based thermal generation,” the engineer said.

According to power sector estimates, hydroelectricity generation costs remain below Rs. 5 per unit, whereas coal-fired electricity generation costs range between approximately Rs. 18 and Rs. 25 per unit depending on international coal prices and exchange rate fluctuations.

Diesel and furnace oil-powered thermal generation are significantly more expensive, costing between Rs. 40 and Rs. 70 per unit.

CEB officials said the prevailing rainy conditions were therefore producing enormous savings for the financially-strained utility.

Daily electricity demand currently fluctuates between 45 million and 50 million units. One unit equal 1 kWh. One million units 1 GWh.

Energy sector estimates indicate that if hydropower generation replaces between 10 million and 15 million thermal-generated units daily, the CEB could save between Rs. 350 million and Rs. 900 million per day depending on the displaced fuel source.

Even replacing coal-powered generation alone could save between Rs. 150 million and Rs. 300 million daily.

“The present rains have arrived at a critical time for the CEB. Higher hydro generation means lower fuel imports, reduced thermal dispatch and major savings for the utility,” another senior engineer said.

Meanwhile, the prevailing adverse weather has also caused fatalities and damage in several districts.

The Disaster Management Centre (DMC) said one person had died while 62 families in four districts had been affected by the severe weather conditions.

The fatality was reported from the Koralai Pattu South Divisional Secretariat Division in the Batticaloa District.

According to the latest DMC situation report issued at 10.00 p.m., 17 Divisional Secretariat divisions across four districts have been affected by the disaster situation caused by the severe weather.

Some 203 persons belonging to 62 families have been affected so far, while 17 people are currently being accommodated at safe shelters.

The DMC further stated that 39 houses had been damaged due to the prevailing adverse weather conditions.

Meanwhile, the Department of Meteorology issued a red warning for heavy rains in several parts of the country.

The Met. Department said the prevailing showery conditions were expected to continue further due to the low-pressure area in the vicinity of Sri Lanka.

Very heavy showers exceeding 150 mm are likely at some places in the Western, Sabaragamuwa, Central and Northwestern provinces and in the Galle and Matara districts.

Heavy showers of about 100 mm are also likely at some places elsewhere across the island.

The Disaster Management Centre yesterday urged the public to take adequate precautions to minimise damages caused by heavy rain, strong winds and lightning during thundershowers.

By Ifham Nizam

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President orders acceleration of Ditwah relief programmes

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President Dissanayake

President Anura Kumara Dissanayake directed officials to fast-track the completion of the resettlement process for people in the Kandy District who lost their homes due to the recent Ditwah disaster. Speaking at a Special District Coordinating Committee meeting held at the Kandy District Secretariat on the 12th, the President reviewed the progress of land acquisition for resettlement at the Divisional Secretariat level.

The President emphasised the urgent need to resolve existing administrative hurdles and ensure that affected families are provided with permanent housing solutions without further delay.

During the session, the President individually consulted Divisional Secretaries on the progress of compensation for the 12,169 houses reported as partially damaged within the district. According to official data, while 4,488 families are currently eligible, only 3,038 have received compensation thus far. The President also highlighted the status of 1,583 high-risk houses requiring full resettlement and thousands of others awaiting NBRI technical reports. He instructed officials to expedite the remaining payments and clear the backlog of inspections to ensure all victims receive their due relief.

Addressing the long-term safety of the community, President Dissanayake noted that it was the government’s primary responsibility to prevent residents from returning to identified high-risk zones. The discussion focused on identifying new lands for relocation, with special attention paid to the plantation community living on private estates. Plans were discussed to reclaim government lands currently managed by private companies to facilitate these housing projects.

Additionally, the President addressed the construction of retaining walls for houses where land stabilisation is necessary and promised a solution within the coming week regarding the fluctuating prices of construction materials and compensation for business losses.

The high-level meeting was attended by a distinguished gathering, including Minister of Agriculture K.D. Lalkantha, Central Province Governor Professor Sarath Abeykoon, and Deputy Ministers Hansaka Wijemuni and Prasanna Gunasena. Several Members of Parliament, including Jagath Manuwarna and Riaz Farouk, also participated alongside the Mayor of Kandy, the District Secretary, and various heads of state departments and security forces. The collective presence of these officials underscored the government’s commitment to a coordinated and swift recovery effort for the Kandy District.

By S.K. Samaranayake

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