Bio-Retention Cell LID Control in #SWMM5 and #InfoSWMM for Sustain
This is an introduction along with images of the LID Control and data require3ments in InfoSWMM. Every InfoSWMM Control uses from one to 5 layers of data - each with different data requirements. You can use the Siting Manger of InfoSWMM Sustain to find LID locations and the LID Optimizer to find the optimized number of units, cost of units, area and thickness of the LID layers based on your runoff and water quality control objectives.
The Bio-Retention LID Control has four components or Process Layers: Surface, Soil, Storage and Underdrain.
The Surface Process Layer consists of:
· The Storage Depth in inches or millimeters
· The Vegetative Cover Fraction (0 to 1),
· Surface Roughness (Manning’s n)
· Surface Slope (percent).
The Soil Process Layer consists of:
· Soil Thickness in inches or millimeters,
· Porosity as a Fraction (0 to 1),
· Field Capacity as a Fraction (0 to 1),
· Wilting Point as a Fraction (0 to 1),
· Conductivity (inches/hour or millimeters/hour),
· Conductivity Slope,
· Suction Head (inches/hour or millimeters/hour)
The Storage Process Layer consists of:
· The Storage Height in inches or millimeters,
· The Void Ratio as a Fraction (0 to 1),
· Surface Conductivity in inches/hour or millimeters/hour,
· Clogging Factor
The Underdrain Process Layer consists of:
· Drain Coefficient (inches/hour or millimeters/hour)
· The Void Ratio as a Fraction (0 to 1),
· Drain Exponent,
· Drain Offset Height (inches or millimeters)
An example of a Bio-Retention Cell.
The four layers used in a simulation for a Bio-Retention Cell LID are shown in the following image.
