Water Levels in Iceland's Múlakvísl River May Rise Amid Gas Hazard

Unusual activity in Iceland's Múlakvísl river has prompted warnings of a potential glacial outburst flood in the coming days. Electrical conductivity measurements in the river have steadily increased, reaching levels significantly higher than typical for this time of year. This rise suggests that a small glacial flood is currently underway.

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At so far, conductivity measurements that indicate the amount of geothermal water in rivers have shown a high value in the stream and suggest that a small glacial flood is underway.

Authorities have noted that while the river's water level has not yet risen in correlation with the increased conductivity, this could change in the near future. The Icelandic Met Office attributes the phenomenon to geothermal water leakage rather than meltwater, resulting in a higher concentration of geothermal elements dissolved in the water.

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At present, the water level in the river has not risen in conjunction with the increase in conductivity, but it is possible that this could happen in the coming days.

Compounding the concern, the flood is accompanied by unusually high gas emissions. Hydrogen sulfide levels measured overnight exceeded health limits, posing a risk to anyone near the river or its sources at the glacier's edge. Individuals experiencing irritation in their eyes or nose are advised to move away from the area immediately.

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This type of flood is not unusual in Múlakvísl, but unusually high gas pollution accompanies the flood this time.

Despite the hazardous gas levels, officials state that the current water volume itself does not pose an immediate danger. The primary warning concerns the gas pollution. Glacial outburst floods are not uncommon in the Múlakvísl river, but the significant gas emissions accompanying this event are particularly noteworthy.

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Hydrogen sulfide is heavier than air and therefore usually settles in low-lying areas; it is odorless and dangerous to human health. If people feel stinging in their eyes or nose, they should get away as soon as possible.