Padma Barrage: another barrier, Pg2

Key Highlights:

• Bangladesh has approved the Padma Barrage project on the Padma River in Rajbari district.
• The barrage aims to re-engineer the hydrology of southwest Bangladesh, which is prone to drought.
• The 2.1-km barrage will have 78 spillway gates and impound 2.9 billion cubic metres of water.
• The project includes 113 MW of hydropower generation and aims to irrigate 2.88 million ha of farmland.

Detailed Insights:

• The Padma Barrage is intended to address reduced seasonal flows caused by the Farakka Barrage in India.
• Critics express concerns that mega-barrages may underperform, alter sediment flows, and create ecological problems like water-logging.
• Environmental groups have criticized the rapid approval process and advocate for increased public scrutiny of the project.
• The project contrasts with efforts in Europe and North America, where obsolete dams are being removed to restore river flows.

Key Concepts Involved:

• Barrage: A type of low-head dam used to increase water levels for irrigation or diversion.
• Hydrology: The study of the movement, distribution, and quality of water on Earth.
• Sediment Flow: The movement of solid particles (sediment) by water, crucial for maintaining river ecosystems.