ICPR
Modeling Considerations
ICPR's
basic building blocks are Basins, Nodes and Links.
Hydrologic
parameters such as drainage areas, runoff curve numbers and times of
concentration are prepared for each basin and then runoff hydrographs
for various storm events are generated and assigned to the individual
nodes in the system.
There
are two key data requirements for nodes in this model: (1) stagearea
tables for each pond to reflect the amount of storage that's available;
and, (2) initial stages. Initial stages are the starting water
levels in each pond (at "time zero" for the various
simulations) and are typically governed by the various control
structures. Ponds E, F and G are connected together with equalizer
pipes, so the initial stage for all of them would be the same and
determined from the control structure connecting pond G to pond H.
All other initial stages are based on their respective control
structures.
There
are only two different link types for this system: (1) pipes; and, (2)
drop structures. Pipes are used for the connection from node E to
F and from node F to G. All other links in this model are drop
structures. A drop structure link is a composite structure
consisting of one or more weirs in series with a pipe. ICPR
balances the losses through the pipe barrel with the losses across the
weir(s) to determine the flow rate for the structure at each time step.
