Diyawanna oil slick: Expert team makes recommendations | Daily News

Diyawanna oil slick: Expert team makes recommendations

The layer of oil scattered over the water in the Diyawanna Oya.
The layer of oil scattered over the water in the Diyawanna Oya.

An expert team which studied the oil slick in Diyawanna last week has made several recommendations to better conserve water in the area.

The recommendations include preventing the people of the area from discharging untreated and polluted water into the Diyawanna, removing the silt from the bottom of the Buthgamuwa canal at least once a year and allowing the water to drain easily.

Last week, a friend of the Minister of Environment Mahinda Amaraweera had sent several photographs to the Minister regarding an oil slick floating towards the Diyawanna Oya. Minister Amaraweera then instructed Central Environmental Authority Director General Hemantha Jayasinghe to carry out an investigation on this matter.

Accordingly, the Central Environmental Authority deployed senior environmental officers to investigate the matter. The report has been handed over to Minister Amaraweera.

Accordingly, the teams have taken water samples at the Fairway Residencies in Rajagiriya and Buthgamuwa Canal in Diyawanna Oya and those places and tested them.

They note that the water in these places was blackened and that there was a small and thin layer of oil scattered over the water. Also, there was an odour caused by the stagnation of the oily waste at that place and the drainage did not take place regularly. It has also been observed that a thin layer of oil with air bubbles emerges from the bottom when it is shaken with a stick and floats on the surface of the water.

According to the observations made, this situation has increased due to the discharge of waste into the Buthgamuwa canal and the growth of algae/bacteria due to the improper flow of water in the canal. The water enrichment may also increase depending on the amount of nitrogen and phosphorus received from the polluted and polluted water that enters the canal through various channels.

According to the laboratory analysis report, it was also revealed that relevant to drinking standards with a slight purification for circulating water, the chemical oxygen demand and immobility have been exceeded, chemicals pertaining to the standards for bathing and recreation for circulating water Oxygen Demand (Category B), Ammonia in water according to the standards set by aquatic organisms for circulating water (Category C) have been exceeded.

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