High Intensity Rainfall System V3
The High Intensity Rainfall Design System is a web-based programme that can estimate rainfall frequency at any point in New Zealand. It can be used to estimate rainfall depths for hydrological design purposes, and to assess the rarity of observed storm events.
NIWA’s High Intensity Rainfall Design System (HIRDS) offers planners and engineers more certainty about the frequency of high-intensity rainfalls, enabling them to better design stormwater drainage systems and other structures.
Generate the rainfall table
- Choose a location of interest using the map or enter the coordinates manually (Help)
- Enter site name
- Fill in up to three Projected Temperature Changes
- Choose Output table format(Depth-Duration-Frequency/Intensity-Duration-Frequency)
- Click on 'Generate Tables'