Gradual increase in water flow signals potential jökulhlaup in Skaftá River, Iceland

There has been a gradual increase in water flow in the Skaftá River overnight, suggesting that a jökulhlaup (glacial flood) may be starting. The Icelandic Meteorological Office is monitoring the situation closely, having noted a rise in electrical conductivity along with increased water height and flow at Sveinstind.

The flood is likely originating from the western Skaftá caldera, which typically produces smaller floods compared to the eastern one. Experts predict that the maximum flow will not exceed 750 cubic meters per second.

Currently, the water flow is about 173 cubic meters per second, and the water level is approximately 260 centimeters. Historically, the Skaftá River can handle flows of up to 400 cubic meters per second without issue. However, should the flow surge substantially, there may be risks of overflow near river banks, which could disrupt local roads.

The presence of hydrogen sulfide in the floodwaters is a concern for those sensitive to gas emissions, as it can harm respiratory systems. It is advised for travelers to stay clear of the Skaftá River and the peripheries of surrounding glaciers due to potential hazards, including rapidly forming cracks around the caldera.

As of now, the authorities have not declared a state of uncertainty, but they are keeping a vigilant eye on developments. Two measurement specialists from the meteorological office are on-site, and evacuations could be initiated if conditions worsen. Local residents and travelers are urged to remain informed about the potential risks associated with the evolving situation.