Air can be entrapped in water and wastewater systems under a variety of conditions, and if
such air is not managed properly, it can impose considerable operational penalties. To …

One potential problem affecting below-grade storm-water storage tunnels is the occurrence
of geysering, which is defined as the return of conveyed water to grade. Most investigations …

Events that are referred to as geysers have been observed in storm-water or combined
sewer systems and are associated with jets of water rising through manholes to a …

Storm sewer systems may experience storm geysers, raising concerns about public safety. A
thorough understanding of the influential factors of the geysers is essential yet insufficiently …

Extreme weather events threaten life and property in populated areas. Timely and precise
weather event monitoring and risk assessment are critical, but can be hampered by limited …

Geysers are explosive eruptions of air-water mixture from manholes in drainage systems.
When the design capacity of storm water drainage systems is exceeded during heavy …

Below-grade stormwater storage tunnels are designed to provide relief for collection
networks during intense rain events. Air must be evacuated as the tunnel fills and …

Uncontrolled air pocket release from water-filled shafts can lead to geysering in stormwater
systems. Such occurrences are deleterious from public health and environmental …

Deep storm-water storage tunnels may undergo pressurization during intense rain events. In
the process, air pockets may become entrapped and pressurized, causing significant flow …

In urban stormwater systems, a rapid increase in water inflow can cause the entrapment of
air pockets and subsequent ejection of air/water mixture, commonly known as storm …