Abstract: A device for the damming of a liquid in a liquid basin including a tubular enclosure suitable for arrangement at an edge of the liquid basin, wherein a longitudinal direction of the tubular enclosure extends substantially parallel to the edge, wherein the enclosure encloses a liquid-fillable space, wherein the enclosure, at an exterior side thereof, facing the liquid basin, is provided with a skirt for being supported by a sloping underground of the liquid basin, seen from the edge, wherein the support during use is carried out in such a way, that a contact surface present between the skirt and the underground remains substantially free from liquid from the liquid basin, wherein the enclosure, near the lower side of the side during use facing the liquid basin, is provided with one or more filling openings, arranged above the skirt, that during use create an open liquid connection between the space and the liquid in the liquid basin.