definition
These systems consist of multiple sections made of rigid materials such as steel or fibreglass which are joined or interlocked to form a continuous barrier. The barriers are fully preinstalled and only require operation during an emergency. Operation can be either manual or automatic. They are normally hidden away in an underground compartments or housings and once deployed attach to an adjacent structure or permanent protection. Sectional barriers can be automatic or manual (Ogunyoye F. et. al, 2011, p.54).Co-benefits and impacts
No installation or reconstruction is required during flood events, in case of automatic operation it can be backed up with inspection or sensors to confirm closure, no off-site storage or transportation is required and products are typically highly resistant to impact. On the other hand, defence height cannot be increased during service, there is a possibility of failure of mechanical or electrical operation, cover or structure can get jammed with debris and especially for automatic operation, there is risk of conflict of dual use of defence line (e.g. with people, animals or vehicles)(Ogunyoye F. et. al, 2011, p.56).
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Last modified: Jan. 18, 2017, 11:54 a.m.