A factor applied to point rainfall depths or intensities to generate values applicable to an area.
A device specifically designed to be installed in gravity drains or sewers to prevent backflow from a sewer towards a property or a group of properties.
An index determined by the summation of weighted daily rainfalls for a period preceding the start of a specific event.
The relevant rainfall that takes place before the point in time of interest.
The condition of a catchment before a rainfall event.
Solid sewage-related materials that are visible but create little environmental impact.
The transfer of responsibility for the maintenance of a system of sewers to a sewerage undertaker.
Reduction of peak flow and increased duration of a flow event.