Climate Change: Moving the Target for Wastewater Overflows

WARD, M. (Hydraulic Analysis Ltd), and CAREY-SMITH, T. (NIWA)

The frequency of wet-weather overflows of untreated wastewater to the environment is a key performance metric in managing a separated wastewater network. This metric, also known as a network’s “containment standard”, is typically expressed as average recurrence interval (ARI) of overflows.