In this example, we will demonstrate how to incorporate Low Impact Development (LID) features in a VO model and interpret the impact on water balance using the tools in the software.
Before starting, it’s important to understand how VO handles LIDs within a subcatchment. When you assign LIDs to a subcatchment, the Area property remains the total area of the subcatchment.
The Two-Phase LID Process in VO
VO follows a two-phase process for integrating LIDs into your model:
Phase 1: Define LID Types
You begin by selecting the LID controls to represent generic designs. VO supports several built-in LID types, including:
- SOAKAWAY PIT
- UNDERGROUND STORAGE CHAMBERS
- PERMEABLE PAVEMENT
- RAIN GARDEN
- BIORETENTION
- ENHANCED SWALES
- GREEN ROOF
- FILTER
Each LID type has its own hydrologic behavior and design parameters, which you define in this phase.
Phase 2: Assign LIDs to Subcatchments
Once LID types are defined, you assign them to specific subcatchments. It is essential to know that the total area of the subcatchment remains the same.
