What is the purpose of the “Computed Outflow Volume vs. Target” field in Pondmaker?
This field will show you if your designed pond and outlet are able to reduce the total pond outflow volume to be within the tolerances of the total outflow volume in the target (typically pre-development) condition. If you do not use infiltration with your pond, the computed outflow volume is going to be the same as the total inflow volume before implementing the pond. This is because the pond only attenuates the flow – the same mass of water still flows out of it. So, you may not need to be concerned with this field, unless you are required to reduce the outflow volume by way of infiltration. In the routing step of Pondmaker, if you’d like to implement infiltration to reduce the outflow volume, first go back to step 3 (pond dimensions) and select your infiltration method. Then, click back to the routing step and compute it. Note: the pond dimensions and outlet design steps of Pondmaker will not account for infiltration.
