Once the fishermen of the city of Tripoli found fresh water in the Mediterranean Sea at a distance of about 500 meters from the coast. It was so cold that the fish that got into it immediately died. This phenomenon is called the "Lebanese miracle". The explanation is quite simple: in summer and spring, from the melting of snow in the mountains, only a small part goes to the irrigation of the valleys, but the rest flows into the underground waters of rivers and is carried to the bottom of the sea by strong cold streams.
Underwater sources have also been found in other parts of the Mediterranean, for example, off the coast of France, in the area of the city of Cannes. There, fresh water gushes from a depth of 162 meters, but not far from the city of Sanremo - from a depth of 190 meters. Near the coast of Croatia, in the Adriatic Sea, such a spring is located at a depth of 700 meters.
A very strong underwater source was discovered in Kivera Bay. It is located near the city of Neapolis, at a depth of only 20 meters. However, it is so strong that it can knock motorboats off course. The source is used to provide the nearby villages with fresh drinking water. Near the coast of Southeast Greece, another underwater source was found at the bottom of the Aegean Sea. Its capacity is one million cubic meters per day and is used to irrigate 4,000 hectares of dry land in the region. There are many similar freshwater springs at the bottom of other seas and oceans of our planet.
A considerable number of freshwater sources have been found in the Black Sea. Not far from Cape Foros there is one where the inflow of water is more than 12,000 liters per hour. There are the same freshwater springs in the Odessa Bay between Balaklava and Simeiz. The total flow of underwater sources is about 700 million cubic meters per year. They are especially important in tests, where they are considered the only sources of drinking water for the population. For example, the inhabitants of some Bahraini islands have long been drinking fresh water from the bottom of the Persian Gulf. Swimmers use bags made from sheep skins, dive to the bottom and fill them with clean water.
But in the Gulf of Carpentaria, in Northern Australia, the underwater waters are so powerful that when residents lower bamboo sticks to the bottom, the water rises along them. There is information that during the wars, this was how warships took water.
If very strong freshwater sources are not located deep enough, then fresh water can rise up and form a kind of funnel. One of these is located east of the Florida Peninsula.
Imagine a large "vessel" of fresh water that is 30 meters in diameter and is located among the waters of the Atlantic Ocean. Such a freshwater well, which has a depth of 40 meters, is indicated on all existing nautical charts, and ships have the opportunity to replenish their supplies of clean drinking water.
Many freshwater underwater springs and lakes are located off the coast of the Yucatan Peninsula. The local population swims up to them on their boats and draws fresh water from vessels.
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