The lakebed begins to fill in the late fall, when the amount of rain coming in starts exceeding the ability of the lava tubes to drain off the water,’ she told Live Science. ‘And it continues to fill all winter long in a series of rain or snowstorms.’
Where does the water go?
Nobody knows for certain, but some suggest that it goes down the lava tubes and into layers of cracked volcanic rock before emerging as groundwater, a process that takes between seven and 10 years.
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