Monday, 15 July, 2024, Reg No- 06
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Promptly address waterlogging in our cities

Published : Wednesday, 10 July, 2024 at 12:00 AM  Count : 205

Promptly address waterlogging in our cities

Promptly address waterlogging in our cities

Being a land of six seasons, Bangladesh has mind-blowing scenery of the rainy season that is truly enchanting. But now a days, this rainy season is increasingly becoming a curse for the normal people.

News of waterlogging emerges as soon as the rainy season begins. This waterlogging is making peoples life miserable. The roads are often submerged with waist-deep water. These waters carry dirt, foul smells, and even a shortage of clean drinking water affects the surrounding people. Cities like Dhaka, Sylhet, and Chittagong experience severe waterlogging.

Geographically, Bangladesh is a rain-prone area. Almost 80 percent of the countrys average rainfall occurs between June and October. During this time, excessive rainfall causes water to accumulate in most places across the country. It remains in place for a prolonged period with no way of drainage system of water. This accumulation of water is what we call waterlogging. If the rainwater could flow into the rivers through the drainage systems, this waterlogging wouldn occur ever.

Even in the capital Dhaka, waterlogging starts before the rainy season begins, primarily due to the citys drainage system. According to a report, just 10 millimeters of rainfall per hour can inundate nearly two-thirds of Dhaka city. This disrupts the daily lives of the citizens. To restore the normal state of the city and the daily lives of people, waterlogging must be addressed.

On the purpose of urbanization, people are filling up drainage channels to build residential projects. Houses and large institutions are being constructed, blocking the flow of canals and ponds. Previously, four rivers and 65 canals in Dhaka played a role in draining water from the city. However, these canals and rivers are now so degraded that unless the filling stops, major disruptions in the capitals drainage system are feared. To escape this situation, we must properly preserve the lost and encroached canals of the city.

We must ensure that new canals are not filled up. The citys drainage system must be regularly cleaned. The drainage system in the capital city is already very poor. Most of the existing drains are clogged with waste. The waste management of these unplanned settlements is very poor. As a result, they are dumping solid waste into open drains. Significant solid wastes include plastics, polythene, and cans, which do not decompose easily and block sewer flows in the drains. Thus, the drain water cannot flow into the river, causing water to accumulate and create waterlogging over time.

Therefore, proper waste management is necessary to solve this problem. Properly graded and sized sewer and surface drain lines must be installed to quickly remove all kinds of waste from the capital.

The most important aspect of controlled waterlogging is the height of the water level in the lakes and its distance from the danger level. As maintaining the natural flow of rivers and canals will reduce waterlogging, being aware of the water-holding capacity of the lakes is crucial. We will be aware of the water height in the lakes through the data transformation from SCADA (Supervisory Control and Data Acquisition) sensors, . Whenever it is observed that 95 percent of the capacity is filled, we should immediately pump out the excess water to reduce the water level in the lake. Statistics shows that timely water pumping and maintaining the water level below 95 percent of the capacity can significantly reduce waterlogging in Dhaka city.

We must remember that we can maintain our environment beautifully through our awareness and responsibility. So, waterlogging must be addressed.

The writer is a columnist & student, Department of Geology and Mining,  University of Barishal






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