Clients often require flood plain analysis prior to developing land. A flood plain analysis is a collection of data that includes:
• Elevation data (from both LiDAR, manual survey, previous works)
• Precipitation data
• Key flow nodes where sub catchments input water flow
• Existing storm water management plans and infrastructure detail plans
• Culverts and other infrastructure sizing and attributes
• Location of channel cross sections and their elevation profile.
• Land use (both existing and future determined from planning documents)
• Impervious surfaces
• Flow paths for surface run off and in-channel flow
The data is then used with various precipitation events to determine the resulting water surface elevations for each event. The highest resulting water surfaces are then used to identify the regulatory flood line.