Flood protection

A flood protection for protecting a back area against rising water level in a front area, the flood protection configured to be arranged in an area between the back area and the front area and to operate between a bottom of the area and a water surface of the area, the flood protection comprising:

• a base arranged at the bottom of the area, the base comprising a bottom rail system extending substantially transversely of the area, the bottom rail system comprising a contact face;
• at least one barrier element having a longitudinal direction and a height direction, the longitudinal direction during operation extending substantially transversely of the area, the height direction during operation extending substantially transversely of the area and upward from the bottom of the area, and wherein the at least one barrier element comprises:
• a contact;
• an adjustable ballast system being configured to regulate buoyancy balance of the at least on barrier element;
• wherein the contact has a structure that contacts the contact face of the bottom rail during operation as flood protection by regulation of the buoyancy balance by the adjustable ballast system such that a sufficient downward action of force on the bottom rail system is attained;
• wherein the contact of the at least one barrier element and the contact face of the bottom rail system are configured such that the at least one barrier element under the action of a greater water pressure at one side of the at least one barrier element than at another side of the at least one barrier element will act on the bottom rail system with a horizontal force, and, due to the greater water pressure at the one side of the at least one barrier element, the at least one barrier element tilts to a given angle relative the contact face of the bottom rail system, wherein a center of buoyancy of the at least one barrier element is displaced in relation to a center of gravity of the at least one barrier element;
• and
• wherein the contact of the at least one barrier element is configured to be raised out of interaction with the contact face of the bottom rail system by regulation of the buoyancy balance by the adjustable ballast system and moved into a depository for storage when not in operational use as flood protection, the depository being located separately from the base, wherein the contact of the at least one barrier element when not in operational use as flood protection cannot act on the bottom rail system with a horizontal force.