Hydro Risk Curves

Current Status

The graphs below compare New Zealand and South Island controlled storage to the relevant Hydro Risk Curves.

As of 19 March, New Zealand controlled storage is above average for the time of year, South Island controlled storage is now slightly below average for the time of year. The risk level is Security Normal for both islands.

Latest New Zealand Hydro Risk and South Island Hydro Risk Curves [ pdf 39.86 KB ]
Hydro Risk Curve Input Assumptions [ pdf 851.37 KB ] (Effective from 23 Mar 2017)
Hydro Risk Curve Data for 2017 [ xlsx 26.68 KB ] (Effective from 23 Mar 2017) 
Simulated Storage Trajectories [ pdf 160.83 KB ] (Updated 26 Jul 2016)
Simulated Storage Trajectories: Assumptions [ pdf 708.2 KB ] (Updated 26 Jul 2016)
Find out more about hydro risk curves
Security of Supply Animation