That depends on which country "down south" that you are referring to. Rivers are common to all countries.
The Clutha River also known as the Matau River is 322 km (200 miles) long.
Clutha 322 km
The Clutha or Matau river 322km long. An alternate source (wikipedia) gives 338 km, but this river has a well-defined length starting from the outlet of L Wanaka, and finishing at the coast.
Waikato 425 km North Island Clutha 322 km South Island
the WAIKATO riverThe mighty Waikato.
The second longest river in New Zealand is the Clutha in the South Island which is 322 km long. The Whanganui river (290 km, Nth Island) is third.
Waikato 425 km North Island Clutha 322 km South Island
New Zealand's 5 longest rivers are: Waikato River - 425 km, Clutha River - 322 km, Whanganui River - 290 km, Taieri River - 288 km, Rangitikei River - 241 km.
322 and 644 kilometers
Lake Manapouri is a lake in South Island with a power station. The lake is situated within the Fiordland National Park and the wider region of Te Waipounamu South West New Zealand World Heritage Area.
The island nation of Fiji comprises an archipelago of around 322 islands.
322 Days