The Black Sea, the Mediterraneans sea, the Sea of Marmara connected by the Bosporus EU wire
The Black Sea has a "water exchange" mechanism where 2 types of water flow in the opposite direction. Water from the Mediterranean flows in and the Black Sea water flows out. The Black Sea outlfow is more than its inflow so its water balance is positive.
The Black sea is also a meromictic sea in that the 2 types of water do not mix so it has 2 distinct layers. But the inflow and outflow waters travel through the same water way (Bosporus) and they also do not mix there. So why does water flow into the Black Sea?
The Black Seas water is of a more warmer and "fresher water" type than the saltier and colder Mediterranean Sea. The water from the Mediterranean (Aegean Sea) flows into the deep Sea of Marmara and then flows along the bottom of the Bosporus river up into the Black Sea, while the Black Seas water flows down the Bosporus river on top of the Mediterranean water into the Sea of Marmara.
That is what the text books and Wikipedia will inform you but it still does not explain why you can have water flowing in different directions on top of each other. Water flows downhill? Combined with the fact that the Black Sea flows out more water than it has flowing in there should be no reason for Mediterranean Sea water to flow into the Black Sea.
Unless the Mediterranean and Black Sea water is an exchange system in an Electrical Universe? Different types of water would appear to nature like a positive and a negative.
If it is an Electric Universe exchange system then the rest of what happens in the Black Sea should show signs of being part EU Theory weather (weathEU) and would have similarities to electrical circuit components.
The Black Sea has a Rim Current (gyre) where water is moved around its perimeter. It has a western and eastern current (gyre). The Black Sea also has coastal eddies or currents. EU circuits, wiring and transformers/converters (engines).
The Black Sea has a Cold Intermediate Layer (CIL) with the CIL water apparently being created in the center of the eastern and western gyres. The distinct CIL layer seperates the lakes waters. The top water gets colder until it reaches the bottom of the CIL at the thermocline found there. After the thermocline the deeper the water gets the more warmer it becomes. EU layers.