Heavy Rainfall and Pontoon Bridges Lead to Severe Pollution in Istanbul's Golden Horn
A combination of extreme urban runoff from severe storms and restricted water circulation has caused visible discoloration and turbidity in Istanbul's Golden Horn. Marine science experts indicate that heavy rainfall carried land-based pollutants and sediments into the estuary, overwhelming the city's capacity to filter the surface water.
Furthermore, structural barriers—specifically pontoon bridges—have limited the natural circulation of the water, trapping the polluted runoff in a stagnant environment. Experts warn that the reduced water clarity blocks sunlight from reaching deeper layers, placing significant stress on the fragile marine ecosystem. Upgraded continuous monitoring and evolving management approaches are being recommended to combat the ecological effects of increasingly frequent extreme weather events.
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