the zeelandbrug deltaworks in holland at the oosterschelde river to protect holland form high sea level, this is near the dutch

barrage barrier beach blocking building coast construction control dam delta dike dunes dutch energy engineering flood floodgate flow foam holland impressive jans lock management marchitecture neeltje netherlands north ocean oosterschelde oosterscheldekering protection river sea slides sluice storm stormvloedkering stormy stream structure surge technology tide tourism water waterworks wind works zeeland