Drainage Terms A-Z
W
Wallingford procedure
A design and analysis procedure for urban drainage networks (HR Wallingfor and Institute of Hydrology, 1981a).
washoff (of pollutants)
The transport of pollutant mass from the catchment surface during a rainfall event.
wastewater
Water used and discharged to drain.
water quality
The chemical, physical and biological characteristics of water with respect to its suitability for a particular purpose.
water quality standards
Standards set by the national legislation or European Community directives and enforced by regulatory authorities in member states.
water-table
The surface within soil or rock strata at which groundwater saturation occurs.
Water UK
The organisation representing all water supply companies in the UK.
watercourse
A natural or artificial channel for passage of water.
weir
An overflow structure across a channel that may be used for controlling upstream surface level, or for measuring discharge, or for both; usually horizontal and constructed as either broad- or sharp-crested.
wet well
The entry chamber in a pumping station from which water is pumped to a higher level. |
