<prompt> Qedela umusho olandelayo: I-Grevelingendam phakathi kweGoeree-Overflakkee neSchouwen-Duiveland yaqedwa ngo-1965. AmaGravelingen aseningizimu yeGoeree-Overflakkee ayesahlangene noLwandle lwaseNyakatho. Ngakho-ke isivunguvungu sasingaba phezulu lapha, ngakho kwakhiwa amadamu ohlangothini oluseningizimu yalesi siqhingi ngo-1965. Ukwakhiwa kwe-Brouwersdam kwaqalwa ngokushesha ngemva kokuphothulwa kwe-Gavelingendam ukuze kuncishiswe isikhathi sezikhukhula eziphakeme. Ngemva kweminyaka engaphezu kweyisithupha, entwasahlobo ka-1971, kwaqedwa ukwakha idamu. Phakathi kuka-1964 no-1971 kwakunamazinga aphakeme kakhulu amanzi. Ngo-November 1966 amanzi ayesengaphansi ngamasentimitha ambalwa nje kwezinga le-  <response>: izikhukhula zango-February 1, 1953. 