Puls' level pool routing procedure is used in the retarding basin module. The inflow hydrograph is routed through the basin using the storage routing described below:

where:

i1, i2 =

inflows at times 1 & 2 (m³/s)

s1, s2 =

total storage at times 1 & 2 (m³)

O1, O2 =

outflows at times 1 & 2 (m³/s)

delta t =

routing interval(s)

Subscripts 1 and 2 refer to the beginning and end of the routing interval respectively.