The Waitaki River is a large braided river in the South Island of New Zealand. It drains the Mackenzie Basin and runs south-east to enter the Pacific Ocean between Timaru and Oamaru on the east coast. It starts at the confluence of the Ōhau and Tekapo rivers, now at the head of the artificial Lake Benmore, these rivers being fed by three large glacial lakes, Pukaki, Tekapo, and Ōhau, at the base of the Southern Alps. The Waitaki flows through Lake Benmore, Lake Aviemore and Lake Waitaki, these lakes being contained by the hydroelectric dams of Benmore Dam, Aviemore Dam and Waitaki Dam. The Waitaki has several tributaries, notably the Ahuriri River and the Hakataramea River. It passes Kurow and Glenavy before entering the Pacific Ocean. The river lends its name to the Waitaki District on the south side of the river.

thumb|Waitaki River below [[Waitaki Dam|right]]

The river's flow is normally low in winter, with flows increasing in spring when the snow cloaking the Southern Alps begins to melt, with flows throughout the summer being rainfall dependent and then declining in the autumn as the colder weather begins to freeze the smaller streams that feed the catchment. The median flow of the Waitaki River at Kurow is .

The first major infrastructure developments on the river were made between 1881 and 1914 with the construction of road and rail bridges at Kurow and Waitaki Bridge.

The middle of the river bed was a historical political boundary between Canterbury and Otago. The term "south of the Waitaki" is often used to refer to the Otago and Southland regions as one common area (the two regions share historical and ethnic relationships that make them distinct from the regions to the north of them).

The river is popular for recreational fishing and jetboating.

Toponymy

Waitaki translates from southern Māori as 'weeping waters' (wai meaning 'water' and taki meaning 'to weep, mourn'). The equivalent in standard (northern) Māori is Waitangi. This scheme, known as Project Aqua, planned to divert up to 77 percent of the lower river's flow to create a hydroelectric scheme, but these plans were dropped in March 2004. Lack of commercial viability was given as the major reason for the scheme's shelving, although strenuous public protest may also have been a major contributing factor. A more modest successor scheme, the North Bank tunnel, looked likely to proceed, with water rights being granted in 2009, but land access negotiations were suspended in January 2013 due to flat demand for electricity forecast for the next five years.

See also

  • List of rivers of New Zealand
  • Reservoirs and dams in New Zealand

References

Further reading

  • Waitaki Valley website (archived)
  • Meridian energy Waitaki hydro scheme
  • Hydrologic webmap of the Waitaki river basin