Low tide and high tide
The Eastern Scheldt consists of water, lots of salt water. It flows in the eternal rhythm of high and low tides.
It takes both the high tides and low tides 6 hours and 15 minutes to come and go. The highest and lowest positions will take about 10 minutes. At low tide, the water flows out of the Eastern Scheldt through the storm surge barrier to the North Sea. At low tide, sandbanks and silts fall dry, old agricultural and fishing harbours run completely dry, the stakes of fish nets stick high through the water level, and at low tide you can even see part of the nets. Immediately after the low tide, the high tide returns.
In the event of a flood, the water will return and dry parts will be filled again. At high tide, the Eastern Scheldt is full of water again from dike to dike, and from quay to quay.
Many types of worms and shells live in the bottom of the plates and salt marshes. They serve as food for many bird species. The plates are also very important for seals. They rest here and suckle their young.
Without the tide - if the plates and silts would not fall dry - the birds would never find enough food and there would be no seals in the Eastern Scheldt.