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It is often prudent to assume that maintenance will be intermittent and to include a clogging factor into engineering calculations to account for periods in which the debris has not been removed.  
It is often prudent to assume that maintenance will be intermittent and to include a clogging factor into engineering calculations to account for periods in which the debris has not been removed.  


A suggested value of 0.5 is often adopted. This is equivalent to 50 % of the cross-section of the structure being clogged during the event being modelled.
A suggested value of 0.5 is often adopted. This is equivalent to 50 % of the cross-section of the structure being clogged during the flow being calculated.  


==Geotextiles/filter fabric==
==Geotextiles/filter fabric==

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