Flood control solutions of some countries in the world

(Baonghean.vn) - To limit damage caused by floods, many countries in the world such as the Netherlands, England, or neighboring countries Malaysia and Singapore have had great solutions to prevent floods.

1. The '2 in 1' tunnel in Malaysia

SMART Tunnel in Kuala Lumpur. Photo: Amusing Planet.

The capital Kuala Lumpur is located near the confluence of two major rivers in Malaysia, so every year, the residents of this leading modern urban area in Southeast Asia also have to complain about floods.

However, one of the special creative forms that has been put into operation in this urban area is the construction of a "2 in 1" tunnel, used both for flood drainage and traffic service.

During normal weather conditions, the tunnel will function as a regular road tunnel for vehicles to pass through. However, when the river rises, it will be transformed into an emergency drainage channel right under the roads, helping to prevent the roads above from being flooded.

2. Building seawalls in the Netherlands

The Delta Works project in the Netherlands includes 13 dikes with a total length of nearly 16,500 km. Photo: Medias.

The Delta Works is a massive project consisting of a series of flood protection structures built after the historic North Sea flood that hit the Dutch coast in 1953, according to Water-technology.net. The flood inundated 9% of the Netherlands' agricultural land and claimed the lives of 8,361 people.

The Delta Works project, which includes 13 dikes with a length of 16,496 km, along with around 300 breakwaters, drainage channels, sluice gates, embankments and alluvial soils, reduces the length of the coastline and protects the areas surrounding and surrounding the Rhine-Meuse-Scheldt delta in the southwestern Netherlands from floods from the North Sea.

3. Underground flood control works in Japan

Giant sewer system under Tokyo, Japan. Photo: Weibo.

The Metropolitan Area Outer Underground Discharge Channel is the world's largest underground flood drainage system, located 50 m below a soccer field and skate park in a suburb of Tokyo, Japan.

The system includes five vertical concrete shafts, each 65 m high and 32 m wide, connected to 6.4 km of tunnels and a giant pressure tower dubbed the "Underground Temple", 177 m long, 78 m wide and 25.4 m high.

Floodwaters from four major rivers entering Tokyo are channeled underground, flowing through tunnels before flowing into the Edo River. The system's pumps can pump 200 tons of water (equivalent to a 25-meter swimming pool) into the Edo River every second.

4. Large-scale water reservoir project in Singapore

Panoramic view of Marina Dam and Reservoir in Singapore. Photo: Flickr.

Instead of using complicated measures, Singapore has deployed the construction of water reservoirs across the country to both prevent floods and rising water levels and provide fresh water for the people. 17 water reservoirs in Singapore are proving their clear flood prevention performance.

The most notable of the flood control projects in Singapore is the Marina Reservoir and Dam. The Marina Reservoir project has a total cost of up to 135 million USD and is the largest reservoir in Singapore. With a system of dykes, it not only helps prevent seawater intrusion, acting as a reservoir when flooding occurs, but also helps reserve seawater for the entire city.

5. Thames Barrie flood control project in England

Thames Barrier. Photo: Getty

The Thames Barrier consists of a barrage built on the River Thames. The barrage is 520m long and spans the Thames in Woolwich, east of London. The Thames Barrier consists of 10 sections, each 60m long and nearly 15m high. Each section has a steel gate that can swing horizontally or vertically.

Normally, these steel gates will be open to allow the river water to flow freely and allow ships to pass. If necessary, these gates will be closed, creating a depression or “reservoir” for the Thames to flow into, preventing the river from overflowing and causing flooding. It takes 75-90 minutes to close these gates, starting with the gates on both sides, with the middle gates closing last.

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