Wet Wells in InfoSewer and H20Map Sewer
Wet-wells are nodes with storage capacity that can vary with time during an extended period simulation. The primary input properties for wet wells are:
ยท The bottom elevation where the wastewater level is assumed to be zero
ยท The minimum level, i.e., the lowest allowable wastewater level above the bottom elevation
ยท The maximum level, i.e., the highest allowable wastewater level above the bottom elevation
ยท The initial level above the bottom elevation
ยท The wet-well diameter
Wet-wells are required to operate within their minimum and maximum levels. A wet-well can be modeled as a constant diameter (cylindrical) where a representative diameter is specified as the diameter corresponding to the average wet-well area. In case a wet-well can not be adequately described by a representative diameter, InfoSewerH20Map Sewerallows you to define data for the stored volume as a function of depth of wastewater using a curve (see CURVE section). This allows wet-wells of any shape (variable cross-sectional area) to be accurately modeled.
For an extended period simulation, InfoSewerH20Map Sewer accurately calculates the change in levels of a wet-well. The wastewater level is allowed to vary between the user-specified range of minimum and maximum permissible levels. If the wastewater level in the wet-well drops below the minimum level specified, the program automatically closes the pumps and no additional flow can exit the wet-well. InfoSewerH20Map Sewer models the change in wastewater level of a wet-well using the following equation:
The results computed for wet-wells for each time period of a simulation are:
ยท The wastewater level
ยท Grade
ยท Volume
ยท The volume percentage
ยท The overflow rate