Rangitahi Lake (sometimes spelt Rangitai) is located in the

Chatham Islands The Chatham Islands ( ) (Moriori: ''Rēkohu'', 'Misty Sun'; mi, Wharekauri) are an archipelago in the Pacific Ocean about east of New Zealand's South Island. They are administered as part of New Zealand. The archipelago consists of about te ...

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

. It is located on Chatham Island, to the northeast of

Te Whanga Lagoon Te Whanga Lagoon dominates the geography of Chatham Island, in the South Pacific Ocean off New Zealand's east coast. It covers . It is the outflow of several small rivers in the island's hilly south, and drains to the Pacific via gaps in Hanson ...

, close to the northern end of

Hanson Bay Hanson Bay is a large bay which comprises almost the entire east coast of Chatham Island, the largest island in New Zealand's Chatham Islands archipelago. It is in extent, stretching from Okawa Point in the island's northeast to Manukau Point ...

. Lake Rangitai is a

dune A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, f ...

-dammed lake, which is clearer than nearby lakes, with underwater visibility over . It provides the water supply for Kaingaroa, about away. In the deeper parts of the lake the vegetation is dominated by the

Charophytes Charophyta () is a group of freshwater green algae, called charophytes (), sometimes treated as a phylum, division, yet also as a superdivision or an unranked clade. The terrestrial plants, the Embryophyta emerged within Charophyta, possibly fro ...

Lamprothamnium and

Nitella ''Nitella'' is a genus of charophyte green algae in the family Characeae. Species The species in the genus include: *'' Nitella abyssinica'' A. Braun * '' Nitella acuminata'' A. Braun ex Wallman *'' Nitella aemula'' A. Braun * '' Nitella an ...

hyalina.

References

Lakes of the New Zealand outlying islands Landforms of the Chatham Islands Chatham Island {{OutlyingNZ-geo-stub