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Void Ratio - Defines the percentage of the tank that is available for storage. This is dictated by the type of fill material that is used, i.e. 100% if empty or typically 30% for rubble.

Average Average Slope - The average side slope is determined from the difference in the Top Area and Base area, assuming circular sides.

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Enter the depth increment for the tank area spreadsheet. Small values lead to a more accurate result but limit the height of the structure.

Sizing Calculator

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The Sizing Calculator option allows the user to re-size the Tank by specifying a volume and a parameter to modify to achieve that volume.  It also allows the user to specify a Side Slope for the Tank. The Sizing Calculator is discussed in more detail in the Stormwater Control Sizing Calculator.

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Inlets

Explore the Inlets page for more details on the different types of Inlets that can be specified.

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Outlets

Explore the Outlets page for more details on the different types of Outlets that can be specified.

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Advanced

TODO - New Screenshot

Base Infiltration Rate - Defines the rate of infiltration through the base of the filter area. This should be determined from a performance site test.

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Roughness - Colebrook-White roughness value. Used by the Colebrook-White Formula equation to calculate the velocity and therefore time of travel when using the Colebrook-White option.

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Pollution


Name - Name of pollutants. This is populated based on the Pollutants set up as part of the Site Data.

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