SWMM - LID Controls - Rain Barrel
Rain Barrels - are containers that collect runoff from the roof during storm events and can release or reuse rainwater during periods of drought
Schematically:
- Storage
- Storage Height - Gravel layer thickness or Rain Barrel height
- SWMM
- Deep Drain
- drainage Coefficient - The drainage coefficient (C) and the exponent (n) determine the flow rate through a drain as a function of the height of the water stored above the drain displacement li>
- Control Curve - The name of an optional control curve that adjusts the calculated drain flow as a function of the head of water above the drain
- Exponent - The drainage coefficient (C) and exponent (n) determine the rate of flow through a drain as a function of the height of stored water above the drain displacement< b>q = C * h ^ n
- Opening Level - The height in the Drain's Storage Tier that causes the drain to automatically open when the water level rises above it.
- Closing Level - The height in the Drain Storage Tier that causes the drain to automatically close when the water level drops below it
- Offset - This is the height of the drain line above the bottom of a storage layer or rain barrel
- Wait Time - The number of hours of dry weather that must elapse before the drain line on a rain barrel opens
- Pollutant Removal - Specifies the removal rates for each pollutant
Note: Do not repeat the pollutant and do not leave the value at zero