The Calculations tab stores numerical data related to the size and storage capacity of the detention basin. The fields in this tab are described in the table below:
At this time, no automatic calculations are performed using this data.
Field Name |
Definition |
Length Width Depth |
Use these fields to record the basin dimensions. |
% Impervious |
The percentage of area upstream of the structure that is impervious. |
Volume |
The total volume of water the detention basin will hold in cubic feet. |
Inlet Elevation Outlet Elevation |
These fields record the elevations at the inlet source of the basin and the outlet to which the basin drains. |
Storage Calc Pg Outfall Calc Pg |
These fields record the page numbers in the plan set where the storage and outfall calculations are stored. |
Runoff Coef. |
The average runoff coefficient of the contributing area. |
Contributing Area |
Total area draining to the basin. |
Maximum Volume |
The maximum volume of fluid that the detention basin can hold. |
Release Rate |
The rate of flow that the fluid exits the basin. |
The Calculations Tab also has a grid that stores detention basin calculations for volume and discharge rates.
Note: These calculations are not performed automatically by the system; they are entered by the user.
A sample of the grid appears below. Sort records in the grid by clicking on the headings. An up or down arrow (highlighted in orange below) will appear signifying ascending or descending order.
Add a new Calculation record
