Wairoa at Irvines - River Flow

This page contains the following information:

Flow for last 7 days at Wairoa at Irvines

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All times are in NZ Standard Time, during Daylight Saving add one hour.

Flow for last 30 days at Wairoa at Irvines

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River Flow History

Catchment size: 462 km2

Period of analysis: 11 November 1957 to 30 April 2016

Comment: This site is run in conjunction with NIWA and data is combined with the original site at the gorge.

 Flood FlowsDrought Flow
Return Period (m3/s) 1 day average7 day average
 Annual 711.2 2.025 2.193
 5 Year 921.9 1.571 1.681
 10 Year 1065.8 1.417 1.506
 20 Year 1193.8 1.303 1.378
 50 Year


1.188 1.249
 100 Year 1450.7 1.118 1.169
 Extreme Recorded







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Map of Site Location

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Tasman District Council has exercised all reasonable skill and care in collecting and displaying this information. However, the data is provisional, and may be incorrect until checked by staff. Data should be used with caution where there are safety, monetary, or operational consequences if the data is incorrect. Note also, the data may be changed at a later time.