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Each year, HCMC has spent thousands of billions to implement projects related to floods and tides.

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However, HCMC is still heavily flooded after heavy rains. Recently, solutions such as super pumps, underground reservoirs have been piloted by the HCMC Center for Flood Control, but the effectiveness is only temporary.

Flooding everywhere

For many years, the people of Ho Chi Minh City are so accustomed to the heavy rain that flooded many roads, causing congestion and traffic crippling, even threatening safe flights Tan Son Nhat International Airport… Flooding doesn’t only affect the city center like before; now, many new suburban areas are also seriously threatened, such as Thu Duc District, Binh Tan District, District 12.

In the Hiep Binh Chanh Ward, Hiep Binh Phuoc (Thu Duc district), after heavy rains, there are many TVs, refrigerators, clothes and cars of the people in the water. And yet, thousands of square meters of maize gardens of farmers preparing to sell on Lunar New Year 2018 are almost sinking in their best growing period. Many fish growers are becoming empty-handed.

So far, the drainage system of the city has become overloaded. When heavy rain, roads of Binh Thanh District, District 6, District 8, District 2, Thu Duc District, Binh Tan District, Tan Phu District… quickly be water submerged; the traffic completely paralyzed. On the Xo Viet Nghe Tinh route, near the intersection of Hang Xanh, D2, Nguyen Huu Canh… water flooded deeply to saddle. No Trang Long, Dinh Tien Hoang (Binh Thanh), Kha Van Can (Thu Duc), Le Van Si (District 3), Hoang Van Thu (Tan Binh), Kinh Duong Vuong (Binh Tan) Nguyen Huu Canh (District 1)… also turn into rivers.

Temporary flood protection system
Super anti-submerged pumps are only a temporary solution, but for a long time there is no solution

Due to the fact that the channels and the canals are filled inconsiderably

One of the causes of flooding in the city today is 60% of canals in the area are wiped out to build real estate projects. Ho Chi Minh City has seven drainage canals of 926km, with 412 discharge outlets. However, floods in Districts 5, District 6, District 8, District 11, Binh Thanh district, Tan Binh district, Thu Duc district… have become more serious as more than 5,000 households encroach on canal banks that pouring litter and sewage directly into the canal system.

At present, there are 182 positions of rivers, canals are encroached, most concentrated in District 7 (49 places), District 8 (39 places), Thu Duc, Binh Chanh (24 places), Binh Thanh (17 locations), Nha Be (15 locations)…

The canals, ponds and lakes were leveled up such as Ong Kich canal, Ba Lai canal, Cut canal, Binh Tien, Ba Lai, Dam Sen, Sen pond… and many other canals are in “dying” period such as Lang canal, Binh Loi canal, Van Thanh canal. In the inner part of the city, most of the land is concreted and asphalted to build houses, factories, roads. When it rains, all the water is concentrated into the stream, unable to penetrate the ground.

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Many solutions are only temporary

In recent years, HCMC has invested tens of thousands of billions VND to dredge, renovate and upgrade nearly 2,600km of sewerage, 60km of canals, reinforce dykes, embankments, build Nhieu Loc – Thi Nghe tidal control sewer; construction of a number of wastewater treatment plants and regulating lakes contributed to the reduction of waterlogging by 62 floodplains (from 95 to 33 floodplains). However, the implementation of the planning is very slow due to lack of investment capital, obstacles in land clearance, especially irrigation planning against flooding, so that flooding by tides slowly overcome.

Temporary flood protection system

Recently, Ho Chi Minh City completed the installation of a reservoir in Thu Duc district to prevent floods in the area. The reservoir is underground and can contain more than 100m3 of rainwater. During operation, the water intake from the rainwater sewer and when the water is full will drain the water out of the pipe.

Similarly, in order to deal with flooding, the city government has allowed Quang Trung Industry Group Corporation to install and pilot the “super-pump” operation against flooding in Nguyen Huu Canh Street. This pump system has a capacity of 100,000 m3 / h, which is expected to end the flooding here. According to the assessment, if the 100 mm intensity spots of rain last for 2 hours, the pump will run for 1 hour and the water will be gone.

“If you imagine Ho Chi Minh City as a pan surrounded by water, the principle of flooding is to pump this place to push the water pressure to another, then another place flooded. So can this machine pump water in this giant city forever? The problem here is how to do irrigation, how to solve the problem of flooding in the city of the overall strategy of the whole region, not only for Ho Chi Minh City. Of course, in order to solve the big problem which requires large expenditure and a huge amount of time, so there are some issues that need to be resolved immediately” – Prof. Dr. Dao Xuan Hoc, former Deputy Minister of Agriculture and Rural Development Chairman of the Vietnam Irrigation Association, analyzed.

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