Lake Rotoiti (Bay of Plenty)

For the lake in the South Island, see Lake Rotoiti (Tasman).

Lake Rotoiti
Lake Rotoiti
Lake Rotoiti
Location of Lake Rotoiti
Location of Lake Rotoiti
Lake Rotoiti
Bathymetric map of Lake Rotoiti
Bathymetric map of Lake Rotoiti[1]
LocationRotorua Lakes, Bay of Plenty Region, North Island
Coordinates38°02′20″S 176°25′40″E / 38.0390°S 176.4277°E / -38.0390; 176.4277
Typecrater lake
Primary outflowsKaituna River
Basin countriesNew Zealand
Max. length15 km (9.3 mi)[2]
Max. width3.6 km (2.2 mi)[2]
Surface area34.3 km2 (13.2 sq mi)[2]
Average depth33 m (108 ft)[2]
Max. depth100.0 m (328.1 ft)[2]
Surface elevation279 m (915 ft)[2]
References[2]

Lake Rotoiti is a lake in the Bay of Plenty region of New Zealand.[3] It is the northwesternmost in a chain of lakes formed within the Okataina Caldera. The lake is close to the northern shore of its more famous neighbour, Lake Rotorua, and is connected to it via the Ohau Channel. It drains to the Kaituna River, which flows into the Bay of Plenty near Maketu.

The full name of the lake is Te Rotoiti-kite-a-Īhenga,[4] which in the Māori language means "The Small Lake Discovered by Īhenga", the Māori explorer also credited with discovering Lake Rotorua. Legend says that the lake was named as such because when Ihenga first saw it, he could only see a small part of it and thought the lake was a lot smaller.

Since the 1960s, the quality of lake water has been negatively affected by inflows of nitrogen rich water from Lake Rotorua, agricultural run-off from surrounding farms and seepage from domestic septic tanks.[5] The effects of this included an almost permanent algal bloom in the Okere arm of the lake and choking lake weed growth in other still areas of the lake. A barrier to divert the nutrient rich waters of Lake Rotorua into the Kaituna River was completed in late 2008.

The Bay of Plenty Regional Council is expected to see improvement in lake water quality within five years.[6] The Rotorua Te Arawa Lakes Program reported in 2013 that the intervention has significantly improved water quality. Water quality is the highest it has been in decades, and it is on track to meet targets set by the Program to meet community expectations.[7]

Lake Rotoiti has thermal hot-spring baths on the southern shore which are accessible by boat.[8]

  1. ^ de Ronde, Cornel E.J.; Caratori Tontini, Fabio; Black, Jenny (2021). "Bathymetric map of Lake Rotoiti, New Zealand". GNS Science Rotorua Lakes Map Series. doi:10.21420/8123-EA25. Retrieved 31 August 2023.
  2. ^ a b c d e f g Lowe, D.J.; Green, J.D. (1987). Viner, A.B. (ed.). Inland waters of New Zealand. Wellington: DSIR Science Information Publishing Centre. pp. 471–474. ISBN 0-477-06799-9.
  3. ^ "Place name detail: Lake Rotoiti". New Zealand Gazetteer. New Zealand Geographic Board. Retrieved 2009-03-18.
  4. ^ McKinnon, Malcolm (2 March 2009). "Volcanic Plateau places - Lake Rotoiti to Lake Rotomā". Te Ara New Zealand. Retrieved 19 September 2012.
  5. ^ "Ohau Channel Diversion Wall Monitoring". June 2011. Archived from the original on 2013-02-12. Retrieved 2013-01-03.
  6. ^ "Ohau Channel Diversion Wall". Archived from the original on 2015-11-24. Retrieved 2013-01-03.
  7. ^ "Rotorua Te Arawa Lakes Program, Lake Rotoiti Water Quality Status". Retrieved 2015-04-30.
  8. ^ "Lake Rotoiti, Lake Rotoehu and Lake Rotoma". Archived from the original on 2012-11-15. Retrieved 2013-01-03.