Drainage Terms A-Z
E
effluent
Wastewater or other liquid, partially or completely treated, or in its natural state, flowing out of a pipe or a treatment plant.
erosion
Detachment and movement of soil or sedimentary deposits by the flow of water, such as over the ground surface or within a pipe or channel.
eutrophication
The progressive enrichment of surface waters, particularly non-flowing bodies of water such as lakes or ponds, with dissolved nutrients, such as phosphorous and nitrogen compounds, which accelerate the growth of algae and higher forms of plant life.
evaporation
The drying out process of the ground surface, which constitute a minor part of the losses taken into account within rainfall runoff loss models.
event (rainfall)
Single occurrence of a rainfall period before and after which there is a sufficient dry period to define its effect on the sewerage system.
extreme event
Single occurrence of an event that the likely to occur very infrequently (e.g. long drought or big storm etc.) |
