STEP tools and resources

LID hydrologic modeling

• Treatment Train Tool

Spreadsheet tools

In the LID design wiki

• Groundwater mounding calculator
• 1D drawdown calculator (constant and falling head conditions)

Online training modules

• Design Infiltration Rate
• Building Forward: Preparing For LID Construction

Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.