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Fish return after river is cleaned

Update: August, 09/2014 - 12:00

Rivers can get very dirty, especially after wastewater from factories and homes gets into them.

Fish often die when this happens.

The Thi Vai River in southern Dong Nai Province became like this.

Since then, it has been cleaned up and the fish are back.

People are also farming fish in the river.

The Thi Vai River in southern Dong Nai Province. The quality of the water in the previously polluted river has significantly recovered following six years of efforts to improve waste management.
The Thi Vai River in southern Dong Nai Province. The quality of the water in the previously polluted river has significantly recovered following six years of efforts to improve waste management. - VNA/VNS Photo Sy Tuyen

HCM CITY (VNS) — The water quality in the Thi Vai River in Dong Nai Province near HCM City has improved, allowing fishermen to now catch and farm fish and other species in it.

The river, which flows downstream of the Dong Nai River, was considered dead just six years ago because of pollution caused by untreated wastewater discharged by factories.

Tran Van Tien, a fisherman in Long Thanh District's Phuoc Thai Commune, said the water used to be black because of the waste, which also caused the death of fish, shrimp, and other species.

After the Taiwanese company Vedan was found in 2008 to have been directly discharging untreated waste into the Thi Vai for years, local authorities improved management of wastewater and the river had improved as a result, he said.

"Fishermen can now catch more fish."

Phuoc Thai Commune now has 300 households that fish in the river and raise fish and other creatures with water from the river, according to the commune Farmers Association.

Thousands of households that had ceased farming of shrimp and other aquatic species along the Thi Vai in Dong Nai and Ba Ria – Vung Tau provinces and HCM City have now resumed.

In recent years Dong Nai authorities have taken many measures to improve treatment of wastewater at industrial parks and residential areas before it is released into the river.

Tests in 2013 and earlier this year showed that the river's water quality is good enough for aquatic species to live in it.

But, admittedly, it is yet to meet certain criteria.

Nguyen Ngoc Thuong, deputy director of the Dong Nai Province Department of Natural Resources and Environment, said that occasionally biological oxygen demand (BOD) and chemical oxygen demand (COD) exceed permitted levels, but not often.

Many industrial parks are also located along the Dong Nai River.

Waste from Bien Hoa 1 Industrial Park, the country's first, in Bien Hoa city is a major source of pollution since most companies in the park lack wastewater treatment facilities.

Dong Nai authorities plan to convert the 330ha park into a modern urbancommercial - services zone by 2020, and the factories are set to move out of there.

They have thrown the book at companies violating environmental regulations and are setting up large wastewater treatment plants in industrial parks.

They have also set up many automatic observation stations on the Dong Nai and Thi Vai including at 18 industrial parks that have large, efficient waste treatment plants and 19 firms located elsewhere that generate large quantities of wastewater.

Thuong said the province would soon set up six more such stations on the two rivers.

In the province, around 500,000cu.m of wastewater is produced every day by industries and homes, according to the Department of Natural Resources and Environment. — VNS

GLOSSARY

The river, which flows downstream of the Dong Nai River, was considered dead just six years ago because of pollution caused by untreated wastewater discharged by factories.

Wastewater comes from kitchens, toilets and factories. It needs to be treated before it can be discharged, or let out, into a river.

Tran Van Tien, a fisherman in Long Thanh District's Phuoc Thai Commune, said the water used to be black because of the waste, which also caused the death of fish, shrimp, and other species.

Other species means other types of creatures.

Thousands of households that had ceased farming of shrimp and other aquatic species along the Thi Vai in Dong Nai and Ba Ria – Vung Tau provinces and HCM City have now resumed.

When household cease farming of shrimp and other aquatic species, they stop farming them .

Aquatic species are those that live in water.

But, admittedly, it is yet to meet certain criteria.

Criteria means conditions, or requirements. It's a word that is in the plural. The singular is criterion.

Nguyen Ngoc Thuong, deputy director of the Dong Nai Province Department of Natural Resources and Environment, said that occasionally biological oxygen demand (BOD) and chemical oxygen demand (COD) exceed permitted levels, but not often.

Biological oxygen demand and chemical oxygen demand are scientific terms that are to do with the amount of oxygen needed in water to cause things to break down and rot.

Exceed means "is more than".

Dong Nai authorities plan to convert the 330ha park into a modern urbancommercial - services zone by 2020, and the factories are set to move out of there.

Convert means change.

Urban means in the city; if something is commercial, it runs as a business and aims to make a profit; a services zone is an area where services are offered. Such businesses are involved in providing people with things they need such as transport, electricity, water and so on.

They have thrown the book at companies violating environmental regulations and are setting up large wastewater treatment plants in industrial parks.

To throw the book at someone means to remind them of what the laws are.

To violate environmental regulations means to break environmental rules.

They have also set up many automatic observation stations on the Dong Nai and Thi Vai including at 18 industrial parks that have large, efficient waste treatment plants and 19 firms located elsewhere that generate large quantities of wastewater.

An observation station is a place where there are lookout posts or equipment that can be used to watch what is flowing down the rivers.

Efficient means working well and running smoothly.

Generate means produce.

In the province, around 500,000cu.m of wastewater is produced every day by industries and homes, according to the Department of Natural Resources and Environment.

Cu m stands for cubic metres

WORKSHEET

Find words that mean the following in the Word Search:

1.      An aquatic creature farmed in rivers in Viet Nam.

2.      The gas that is to do with BOD and COD.

3.      Dong Nai is both a river and a ____________ in Viet Nam

4.      The territory where the company called Vedan comes from.

5.      The places from which untreated water entered the Thi Vai River.

 

 

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© Duncan Guy/Learn the News/ Viet Nam News 2014
































1. Shrimp; 2. Oxygen; 3. Province; 4. Taiwan; 5. Factories.

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