Water resources review (February - April)
River flows
River flows in April were particularly low, with many rivers in the northern North Island having the lowest April mean flow ever recorded.
Taking the past three months (February to April) as a whole, river flows were below normal in the north, centre, and southwest of the North Island, and below normal to normal in other locations, except for the southwest of the South Island, where they tended to above normal.
[Water resources information provided by NIWA field teams, regional and district councils, and hydropower companies.]
Groundwater levels
Groundwater levels for the North Island were lower than usual for this time of year, as a result of the extended period of low rainfall over much of the island. A wetter than usual summer in the far south of the South Island caused higher than average groundwater levels there.
| Region | Groundwater level status |
|---|---|
| North Island | Low |
| North and east of South Island | Average |
| South and west of South Island | High |
[Water resources information provided by NIWA field teams, regional and district councils, and hydropower companies.Groundwater information supplied by the Institute of Geological & Nuclear Sciences.]