Experts say drying underground water currents, or changes in soil drainage, could be to blame.

专家称，地下水干燥或者水土流失可能是事故发生原因。

If there were, its underground current had to go from the Red Sea to the Mediterranean simply because of their difference in level.

如果有交通路线存在，地下水流仅仅由于两海的水平面不同，必然要从红海流到地中海。