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How did the 1932 IJsselmeer dam change the former Zuiderzee?
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land reclamation
The Yser River flowing through reclaimed farmland in Belgium.
The construction of the 19-mile-long Afsluitdijk in 1932 fundamentally transformed the former Zuiderzee by sealing it off from the North Sea and the Waddenzee. This engineering feat divided the inlet into two distinct areas: the northern Waddenzee, which remained open to the sea, and the southern IJsselmeer (Lake IJssel).123
The creation of the IJsselmeer brought several significant changes:
- Hydrological Shift: The formerly brackish water was replaced by fresh water, primarily fed by the IJssel River, providing a vital water source for surrounding provinces during droughts.23
- Land Reclamation: The dam enabled the construction of the IJsselmeer Polders, reclaiming approximately 626 square miles of fertile land from the lake for agricultural, residential, and industrial use.123
- Ecological and Economic Impact: The original saltwater fishing industry for species like herring and anchovies was replaced by freshwater fisheries, particularly for eels.2