Arnold Grashoff 4 months ago (edited)
You are missing the point that the river IJssel is flooding from the Alps into the IJsselmeer, by Ketelmeer. You cannot drain the IJsselmeer, because it is constantly fed by fresh water from the Alps, in particular in the spring when the snow is melting. Inside the Ketelmeer there is a special island built, IJsseloog, for deposing environmental contaminated dredging sludge. There are special dredging programs ongoing. Due to the loss of current force at this location, most environmental contaminated particles from the river settle down here to the lake floor. When the level of the river IJssel is extremely high, a state-of-art flexible barrier is placed at Ramspol, to prevent entire back-country side is overflooded and agriculture is damaged by too much water. There are pumps in the Afsluitdijk that are pumping the water out towards the Waddenzee, faster or slower. A certain level inside the IJsselmeer is maintained. Actually, the entire freshwater in the IJsselmeer is a huge freshwater storage for the entire region of Noord-Holland, Friesland, Groningen, Overijssel, Flevoland, etc. for agriculture use (you can not use salt seawater for agriculture). The Afsluitdijk is under maintenance, after 80 years it is not leaking; the outer part will be reinforced with state-of-art, marine ingenuity, designed concrete blocks to make it superstorm proof (as part of a reinforcement program already initiated many years ago, rolled out over the entire country). Further, as well pumps will be installed, in the natural out flooding sluices electric power generators will be placed, power generators based on salt and freshwater will be built, and a new fish transfer river (the first one in the world of this scale) will be built, so fish can migrate into the freshwater part to breed, what was the situation in all the centuries before the Afsluitdijk was built. Side note, this is not the first type, there is a small one as an example at Nieuwe Statenzijl close to the Kiekkaaste with a stunning view over Dollard. There is another huge dike, Markerwaarddijk from Lelystad to Enkhuizen. North of the Markerwaarddijk is the IJsselmeer and south of it the Markermeer. If you like to drain something, you could perhaps use the Markermeer for this, but so far that is not planned. On google maps, you can recognize a huge difference in color between both lakes. Both lakes are freshwater, the difference of color is not caused by a difference in salinity, the cause is algae. IJsselmeer contains high-quality freshwater, fit for agriculture use. Markermeer contains freshwater of less quality. On google maps, you can find inside the Markermeer newly installed islands (close the Markerwaarddijk), which have the purpose to clean the water inside the lake by natural means. The majority of winds over the Markermeer in relation to the new island, are from SW and W-ly direction, causing a surface current in the water, passing these islands. Due to the presence of certain vegetation and present of certain animals, birds, etc. the quality of the water must increase over the coming decades. It has the intention that underwater life must benefit from this and thrive as well. Please be invited to take your time to have a check on this video as well
Nederland
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