Lake Emily (New Zealand)

Lake Emily
A shallow lake with rolling hills and mountains in the background
Lake Emily
LocationAshburton District, Canterbury region, South Island
Coordinates43°33′4″S 171°13′38″E / 43.55111°S 171.22722°E / -43.55111; 171.22722
Surface area19.3 ha (48 acres)[1]
Max. depth2.3 m (7.5 ft)[1]
Surface elevation672 m (2,205 ft)[2]

Lake Emily is a small high country lake located in inland Canterbury in the South Island of New Zealand.[3] The lake is shallow, with a maximum depth of 2.3 m (7 ft 7 in) and has a surface area of 19.3 ha (48 acres).[1] Lake Emily is within the Hakatere Conservation Park,[4] and is part of the Ashburton Lakes (Ōtūwharekai), an area of cultural importance to the iwi Ngāi Tahu because the lakes were a significant food–gathering area and also on a main route for travel between the east and west coasts of the South Island (Te Waipounamu).[5]

The lake is popular for fishing and hiking.[1] It can be accessed via a track from the Hakatere Heron road, and is approximately 31 km (19 mi) west of Mount Somers.[2] The Te Araroa trail passes around the southern end of the lake.[2]

The health of the lake is monitored using two parameters, the trophic level index and the Lake Submerged Plant Indicator. The trophic level index for the lake (a measure of nutrient status) has ranged between 3.8 and 5 over the period 2009 to 2023, ranking as "Fair".[6]

A case study report published by the Ministry for the Environment in 2023 reported that all the Ōtūwharekai / Ashburton Lakes were nutrient-enriched, with some at risk of deteriorating further into severe eutrophic states, changing from clear water with vegetation, to turbid algae-dominated water.[7] The study reported that pastoral farming was the source for more than 90% of nutrients.[8]

References

Media related to Lake Emily at Wikimedia Commons

  1. ^ a b c d "Lake Emily". Our Lakes our Future. Archived from the original on 15 January 2025. Retrieved 28 May 2025.
  2. ^ a b c "NZ Topo Map - Lake Emily". topomap.co.nz. Retrieved 28 May 2025.
  3. ^ "New Zealand Gazetteer - Lake Emily". New Zealand Geographic Board. Retrieved 28 May 2025.
  4. ^ "Hakatere Conservation Park" (PDF). Department of Conservation. Archived (PDF) from the original on 23 March 2022. Retrieved 21 May 2025.
  5. ^ "Lakes Camp and Clearwater". Ashburton District Council. 29 September 2022. Archived from the original on 23 April 2025. Retrieved 21 May 2025.
  6. ^ "Lake Emily". Land, Air, Water Aotearoa (LAWA). Archived from the original on 28 May 2025. Retrieved 28 May 2025.
  7. ^ Davis, Sharon (3 December 2023). "Ashburton Lakes remediation plan expected to be complete before year end". Rural Guardian. Archived from the original on 4 March 2024. Retrieved 25 May 2025 – via New Zealand Herald.
  8. ^ "Õtüwharekai/Ashburton Lakes lessons-learnt report: A case study examining ongoing deterioration of water quality in the Otuwharekai lakes" (PDF). Ministry for the Environment. May 2023. p. 8. Archived (PDF) from the original on 28 March 2025. Retrieved 25 May 2025.