An underflow is a sea flow below the water surface. This can occur as part of the Ekmanspiral. The thermohalic circulation consists partly of underflow. Another cause occurs in sea streams. Thus, in the Mediterranean, more water evaporates than rivers feed. Water through the Strait of Gibraltar is therefore transported from the Atlantic Ocean. As an opposition there is an underrun of saltwater from the Mediterranean towards the Atlantic Ocean. The situation in the Baltic is reversed. Here, less water evaporates than rivers feed. The sweet Baltic Sea flows out the Sont and the Great and Small Belt, which causes an underwater stream of saltwater. From where
At the waterline on the coasts, underflow occurs when the surface water of the sea is propelled by prevailing winds. As a result of tide action, this effect can be strengthened. : mastroom.
During east wind, in the Netherlands, Belgium and France, it is the most favorable situation to find all kinds of shells, gulls and jellyfish along the flood line. Because the wind blows to the sea, the surface water is driven in the same direction and flows back to a deeper level inland. There is an underflow from sea to land. jellyfish that lead, for example, into a flood of water, flow into a flood and flow easily.
In the prevailing west wind, the situation is reversed. The surface water is fed to land and this results in a downward flow at a lower depth. The animals in and on the sand tend to drive into the sea. This situation is also dangerous for swimmers in the surf.
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