Catchment size: 285 km2
Period of analysis: June 1976 to December 2025.
Comment: The Wai-iti river at this location can stop flowing during very dry years. Historically this would happen, on average, once in every 5 years. From 2006 supplementary flows for the Wai-iti catchment are provided from the Wai-iti Dam. The drought flow analysis starts from 2006 and includes Wai-iti Dam supplementary flows.
| Flood Flows | Drought Flow | ||
|---|---|---|---|
| Return Period | (m3/s) | 1 day average | 7 day average |
| Annual | 193 | 0.086 | 0.110 |
| 5 Year | 273 | 0.014 | 0.028 |
| 10 Year | 337 | 0.000 | 0.010 |
| 20 Year | 399 | 0.000 | 0.000 |
| 50 Year | 479 | 0.000 | 0.000 |
| 100 Year | |||
| Extreme Recorded |
441 11/07/2025 |
0 for 34 days 08/12/2005 |
0 for 34 days 08/12/2005 |
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.
