MIDUSS helps you to design a detention pond to
achieve a desired reduction in the peak flow of a hydrograph.
The current peak flow and the total volume of the inflow
hydrograph are reported and you are prompted to specify the
desired peak outflow. MIDUSS estimates the maximum storage
requirement to achieve this.
The storage routing through the pond requires a table of values
defining the outflow discharge and the storage volume
corresponding to a range of stage or depth levels. You can enter
this data directly into the grid if you wish, but it is usually
easier to use some of the features of the Pond command to automate
The outflow control can be designed using multiple orifices,
weir and vortex valves. The Stage - Storage values can be estimated for
different types of storage facility. These may be a multi-stage
pond with an idealized rectangular plan shape and different side
slopes in each stage; one or more "super-pipes" or oversized storm
sewers; wedge storage formed on graded parking lots; or a
combination of these types of storage.
Rooftop storage can also be modelled to simulate controlled
flow from the roof of a commercial development.
Following use of the ROUTE command you can experiment by
changing any of the flow or storage data until the desired result
There is more pond information in our FAQ section.
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