Many estuary and sea dyke systems in Nghe An are degraded.

The Mo River dike system in An Hoa commune (Quynh Luu) has not been upgraded for a long time. Photo: Van Truong

In mid-September, when we were at the Mo River in An Hoa Commune, Quynh Luu, we noticed that the dike was narrow and water was flooding many salt fields of the people. Mr. Tran Binh in An Hoa Commune said: The Mo River dike system has been severely damaged for a long time, every year during the rainy season, water overflows and damages salt fields, shrimp ponds, and even floods people's houses.

Mr. Ho Anh Dung - Chairman of An Hoa Commune People's Committee added: The Mo River dike system (preventing salinity and keeping fresh water) passing through An Hoa Commune is over 7 km long, most of which was built manually, many sections have been eroded. During the rainy season, water often overflows, affecting 160 hectares of salt fields, over 30 hectares of aquaculture of the commune, damaging the salt storage system. In the long term, An Hoa Commune is looking forward to upgrading the Mo River system to prevent flooding.

The Thai River dike through Cau Giat town (Quynh Luu) is low, so water overflowed and flooded many households. (Photo taken on September 20) Photo: Van Truong

In the above situation, the Thai River dike through the Cau Giat town in the West has not been upgraded, so in the rainy season, many houses along the Thai River are flooded. According to the report of the Department of Agriculture and Rural Development of Quynh Luu district, the river dike system in the district is over 46 km long, of which the Thai River dike system is 22 km long, the Mo River dike is 4 km long, currently it is mainly made of unreinforced soil, only able to withstand high tides and storms of level 6 and level 7. In the past, the district has only upgraded 5 km of river dikes in the two communes of Quynh Hung and Quynh Hong.

Just prolonged heavy rain can cause flooding in the Thai River for households in Cau Giat town, Quynh Luu. Photo: Van Truong

Also in Quynh Luu district, the sea dike system is tens of kilometers long, but many of them are seriously degraded, such as in Quynh Luong and Quynh Tho communes. The dike sections are built with low-lying land, so even a light storm can cause seawater to overflow, flooding residential areas and damaging people's fields and aquaculture. In 2020, Quynh Luu district upgraded the sea dike system by nearly 2.5 km, worth over 54 billion VND, through Quynh Tho and Quynh Long communes. Currently, there are still over 15 km of degraded sea that need to be upgraded.

Dien Chau district is also in a similar situation, the river dike system,sea ​​dikealso seriously degraded, many people have to suffer from rising water, saltwater intrusion, threatening people's lives. For example, in Dien Hoa commune, the Bung river dike system is more than 7 km long, the dike body is mainly built with low, weak soil. Mr. Tran Van Minh, a resident of Dien Hoa commune, shared: "During the rainy season, the river water overflows the dike surface, causing flooding of summer-autumn rice fields, fish ponds and many houses of people living along the river".

During the rains from September 14-16, the Bung River dike was eroded along a length of 65m, including a section where the foot of the dike was completely broken, causing water from the Bung River to flow into and flood Dien Hoa commune. Currently, the commune is allocating over 20 million VND from the budget to temporarily fix the problem. In the long term, the State needs to pay attention to investment and upgrade.

Mr. Le The Hieu - Head of Dien Chau Department of Agriculture and Rural Development shared: Dien Chau district has 45 km of river dikes concentrated in Dien Hoa, Dien Quang, Dien Binh, Dien Thai communes... Due to limited capital, the dike system has not been upgraded for a long time, most of the dike sections were built with manual soil since the 80s of the last century, so they have degraded, eroded, and are unable to withstand floods.

The sea dike system through Dien Chau district is over 15 km long, concentrated in the communes of Dien Hai, Dien Hung, Dien Van, Dien Bich, Dien Ngoc, Dien Kim, Dien Trung... In recent years, Dien Chau district has upgraded 7 km of sea dikes, while the remaining sea dike system in Dien Van, Dien Trung, Dien Kim communes is damaged and seriously degraded.

According to the report of the Irrigation Department, Nghe An province has a 200 km long river dyke system. These dykes are responsible for preventing floods in the estuaries of the Mai Giang, Hoang Mai, Thai, Bung, and Cua Lo rivers.

The 7km long Bung River dike system through Dien Hoa commune, Dien Chau district is mainly made of soil, many sections have landslides and broken dike feet. Photo: Van Truong

For the 82 km sea dike route stretching from Quynh Lap commune (Quynh Luu) to Cua Hoi (Nghi Hai ward, Cua Lo town). Currently, there are 41.783 km of sea dikes and 11.65 km of sea embankments including routes, of which over 30 km of sea dikes have been upgraded. According to the assessment, most of the river mouth and sea estuary dikes are degraded and difficult to withstand rain and storms, often causing flooding.

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