definitionThese barriers are made of a single or pair of rigid sections (usually steel or fibreglass), designed to close a gap within a flood defence. They are normally fully pre-installed and only require closure during an emergency. The closure operation can be manual, semi-automated or automatic. Automatic operation can be controlled by sensors and actuators, or by direct hydraulic link to the watercourse. They are normally attached to an adjacent structure or permanent protection or laid flat into a recess within the ground. Manual closure normally involves swinging, rolling or raising into position (Ogunyoye F. et. al, 2011, p.57).
Co-benefits and impactsThe main advantages of flood gate are that no installation or construction required during event, they are easy and quick operation. No off-site or transportation is required for measure's implementation and they are stable and high resistant to impacts. On the other hand, defence height cannot be increased during service, there is a possibility of failure of mechanical part or electricity supply, cover or structure can get jammed with debris and there is a risk of conflict of dual use with automatic operations.
(Ogunyoye F. et. al, 2011, p.57)
Case studies (Show all)Construction of flood gate, pumping station and dike wall, Hoopte, Lower Saxony (20th c.)
Dry-proofing, New York
Flood gate, Prague
FRI indicators (Show all)Availability of hydraulic structures for river watershed management capable to reduce peak discharges
Last modified: Sept. 16, 2016, 6:31 a.m.