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Dichtheid en temperatuur worden gemeten (ter correctie) en de positie van het meetpunt wordt bepaald met het DGPS-plaatsbepalingssysteem (via satellieten). De gegevens worden aan boord opgeslagen in de computer. De peilingen vinden plaats bij een waterstand tussen NAP en hoogwater.\r\n\r\n<li>Doel: tijdig zorgelijke stukken in de vooroevers onderkennen in het kader van beheer primaire waterkeringen. De jaarlijkse rapportage is de basis van werkplanning als bestortingen. 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