Po River faces algae invasion driven by heat and agricultural runoff

The Po River, Italy's longest river, is experiencing a significant proliferation of algae and aquatic plants this summer, particularly in the stretch passing through Turin. This phenomenon is driven by a combination of high temperatures, reduced rainfall, and increased nutrients from agricultural and livestock activities.

Water temperatures in some sectors have reached 28 degrees Celsius, while the river's flow is nearly 50% below its annual average. These conditions have encouraged the growth of species such as Spirogyra and Cladophora, alongside other invasive plants. The buildup of vegetation is obstructing navigation and reducing available oxygen in the water, which threatens the local ecosystem.

To address the issue, the Turin City Council has deployed specialized machinery, including an excavator mounted on a barge, to clear the vegetation. To date, more than 136 tons of aquatic vegetation have been removed at an approximate cost of 100,000 euros.