Tons of fish died after the first rain of the season

Da Nang At least two tons of dead fish in Phu Loc River and Trung Nghia 1 Lake were picked up and taken to Khanh Son landfill for disposal after the first rain of the season.

Many canals and lakes in Thanh Khe and Lien Chieu districts are experiencing dead fish, scum and foul odors in the water. On July 15, the Da Nang Drainage and Wastewater Treatment Company scooped up nearly 500 kg of white-bellied fish from Phu Loc River, Thanh Khe District; on July 17, they scooped up more than 1.5 tons from Trung Nghia 1 regulating lake, Lien Chieu District.

On July 19, dead fish were scattered in Da Co canal, near Chon Tam 6 street, Lien Chieu district, with about 50 kg, mainly tilapia.

Dead fish floating on the canal leading to Trung Nghia 1 Lake. Photo: Trung Nhan

Mr. Huynh Trung Nhan, Deputy Director of Da Nang Drainage and Wastewater Treatment Company, said that the company had sent staff to inspect the entire route but did not detect any illegal discharge. The fish deaths may have been due to low water levels in canals and lakes during the hot season, reducing oxygen levels in the water. On July 15-16, Da Nang had heavy rain, rainwater and wastewater exceeding overflow thresholds entered lakes and canals through the discharge gates, causing sudden changes in the water environment.

Explaining the green scum appearing in many canals, a company representative said it was due to the growth of blue-green algae. Workers have collected the blue-green algae and treated the areas where fish died with chemicals to improve the landscape.

Water in Da Co canal has green scum. Photo: Ngoc Truong

The company also took water samples in the above areas for analysis and assessment of specific causes, and closely monitored the changes in water quality in canals, rivers and lakes in the area.

Nguyen Dong

Source link: https://vnexpress.net/hang-tan-ca-chet-sau-dot-mua-dau-mua-4632011.html