Rainfall Overlay

What is the rainfall overlay

Calculation steps

Here there should be an overview of all the calculations steps. BOB: Flowchart?

Rainfall

Water is created in the form of rainfall. Properties of rainfall the amount of water created per calculation step is based on the amount of calculation steps for the simulation, the duration of the rain, and the amount of rains which falls during that time. Directly after being created by rainfall, water can be placed in one of the follow containers:

Container	Condition
If there is a SEWER area present, which is defined by the presence of a non-zero SEWER_STORAGE attribute, and there is a building present with the SEWERED value set to 1, and the sewer container is not yet full, the water is moved directly into the sewer.		Surface container Surface containers Surface runoff Vertical infiltration Underground containers Horizontal infiltration Surface water Sewer Building storage