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    "ONTSTAAN" : "1200-1500",
    "SYSTEEM" : "Zuidwest-Fryslân hemdijken (of zelfde functie)",
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    "OORSPRONGOMSCHRIJVING" : "Binnenpolderdijken dienden ertoe om bij dijkdoorbraken de penetratie landinwaarts van het zeewater zoveel mogelijk te beperken. De aloude Slachte is hiervan het bekendste voorbeeld. Daarnaast werden binnendijken opgeworpen om het opstuwen van binnenwater tegen te gaan en als het ware door compartimentering het opwaaien van het boezemwater te bedwingen, dan wel het water vanuit naast-gelegen gebieden te keren. ",
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