Continuous heavy rainfall across the country has significantly raised the water level of Kaptai Lake, the largest man-made reservoir in Bangladesh, bringing a wave of positive developments for both local transportation and national electricity generation.
In recent days, the lake has swelled to near capacity due to uninterrupted downpours, restoring its familiar, full-to-the-brim appearance. This rise in water level has eased waterway transportation and enhanced operations at the country’s only hydroelectric power station.
According to officials at the Kaptai Hydropower Plant, the current water level in the lake is approximately 17 feet above the rule curve — a standard guideline used to regulate reservoir levels. As a result, all five units of the plant are operating, generating an average of 195 megawatts (MW) of electricity daily, which is being fed directly into the national grid. Experts believe that if water levels rise further, the plant could reach its full generation capacity of 230 MW.
Mahmud Hasan, Chief Engineer of the Karnafuli Hydropower Station, stated that the expected water level for this time of year is 80.42 feet (Mean Sea Level), according to the rule curve. However, the lake is currently at 97.11 feet, a substantial increase attributed to the recent heavy rains. This surplus water is the primary reason for the boost in electricity production, he added.
Kaptai Lake can hold water up to a maximum level of 109 feet MSL. However, authorities generally begin discharging water once it reaches 105 feet to prevent overflow. With more rain in the forecast, the water level is expected to continue rising, prompting monitoring for potential overflow management.
Beyond electricity, the increased water level has also revitalized boat transportation across the region. Areas that had recently dried up are now submerged again, making river travel smoother and more accessible. The inflow from surrounding waterfalls, streams, and rivers has significantly raised the lake’s water level, easing navigation.
Shital Sarker, Manager of the Kaptai Jetty Boat Owners Association, commented, “The rise in water levels has greatly improved boat travel between Kaptai and nearby hilly regions like Bilaichhari and Rangamati. Just a few weeks ago, low water levels had caused serious disruptions to river transport. That problem is now resolved.”
As the rains continue, both power generation and waterway transport stand to benefit — as long as water levels remain within safe limits.
