SWMM - Time Series

Time series objects are used to describe how certain object properties vary over time

The node Time Series allows a series of actions, such as:

Create - Creates a new time series
Clear - Deletes unused time series
Properties - Provides a tabular view of existing time series

Time series can be used to describe:

Data from temperature
evaporation data
Data from rain
Water internship at outfall nodes
Hydrographs of external inflow at drainage system nodes
External Input Polutographs at Drain System Nodes
control settings for pumps and flow regulators.

Each time series must be given a unique name and can be assigned any number of time value data pairs. Time can be specified as hours from the start of a simulation or as an absolute date and time of day. Time series data can be entered directly into the program or accessed from a user-supplied time series file.

Note: For wet weather series, only It is necessary to enter periods with amounts of rain other than zero. SWMM interprets the precipitation value as a constant value that lasts for the specified recording interval for the rain gauge using the time series. For all other types of time series, SWMM uses interpolation to estimate values at times that are between the recorded values.

Note: For times outside the time series range, a value of 0 for the rainfall and external inflow time series and the first or last value in the series for temperature, evaporation, and water stage time series.

Time series have the following types: