Longshore drift from longshore current is a geological process that consists of the transportation of sediments along a coast parallel to the shoreline, which is dependent on the angle of incoming wave direction. Oblique incoming wind squeezes water along the coast, and so generates a water current which moves parallel to the coast. Longshore drift is simply the sediment moved by the longshore current. This current and sediment movement occur within the surf zone. The process is also known as littoral drift.
Ngāi Tahu, or Kāi Tahu, is the principal Māori iwi (tribe) of the South Island. Its takiwā is the largest in New Zealand, and extends from the White Bluffs / Te Parinui o Whiti, Mount Mahanga and Kahurangi Point in the north to Stewart Island / Rakiura in the south. The takiwā comprises 18 rūnanga corresponding to traditional settlements. According to the 2018 census an estimated 74,082 people affiliated with the Kāi Tahu iwi.
Lake Ellesmere / Te Waihora is a broad, shallow coastal lake or waituna, in the Canterbury region of the South Island of New Zealand. It is directly to the west of Banks Peninsula, separated from the Pacific Ocean by the long, narrow, sandy Kaitorete Spit, or more correctly Kaitorete Barrier. It lies partially in extreme southeastern Selwyn District and partially in the southwestern extension of the former Banks Peninsula District, which now is a ward in the city of Christchurch. The lake holds high historical and cultural significance to the indigenous Māori population and the traditional Māori name Te Waihora, means spreading waters. It has officially had a dual English/Māori name since at least 1938.
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Kāti Māmoe is a Māori iwi. Originally from the Heretaunga Plains of New Zealand's Hawke's Bay, they moved in the 16th century to the South Island which at the time was already occupied by the Waitaha.
Waitaha, an early Māori iwi, inhabited the South Island of New Zealand. They were largely absorbed via marriage and conquest – first by the Ngāti Māmoe and then by Ngāi Tahu – from the 16th century onward. Today those of Waitaha descent are represented by the Ngāi Tahu iwi. Like Ngāi Tahu today, Waitaha was itself a collection of various ancient iwi. Kāti Rākai was said to be one of Waitaha's hapū.
Kaitorete Spit is a long finger of land which extends along the coast of Canterbury in the South Island of New Zealand. It runs west from Banks Peninsula for 25 kilometres, and separates the shallow Lake Ellesmere / Te Waihora from the Pacific Ocean. It is technically a continuous barrier beach, though at its western end it tapers to a point less than 100 metres in width which is occasionally breached at high tide. The spit is noted for its isolation and for its pebbly beaches. At its eastern end is the small settlement of Birdlings Flat, and west of its narrowest point is the settlement of Taumutu.
Lake Mahinapua is a shallow lake on the West Coast of New Zealand's South Island. Once a lagoon at the mouth of the Hokitika River, it became a lake when the river shifted its course. Lake Māhinapua was the site of a significant battle between Ngāi Tahu and Ngāti Wairangi Māori, and is regarded by them as a sacred site where swimming and fishing are prohibited. In European times it was part of an inland waterway that carried timber and settlers between Hokitika and Ross until the building of the railway. Today it is protected as a scenic reserve for boating, camping, and hiking.
Washdyke Lagoon is a brackish shallow coastal lagoon approximately 1 kilometre (0.62 mi) north of Timaru, South Canterbury, New Zealand. The lagoon has drastically reduced in size since 1881 when it was approximately 253 hectares, now it is less than 48 hectares (0.48 km2) in area. It is enclosed by a barrier beach that is 3 kilometres (1.9 mi) long and 3 metres (9.8 ft) above high tide at its largest point. The reduced lagoon size is due to the construction of the Timaru Port breakwater which is preventing coarse sediments from reaching and replenishing Washdyke Barrier. This is important as the lagoon and the surrounding 250 hectares are classified as a wildlife refuge and it demonstrates the role human structures have on coastline evolution.
Uruaokapuarangi was one of the great ocean-going, voyaging canoes that was used in the migrations that settled the South Island according to Māori tradition.
The Estuary of the Heathcote and Avon Rivers / Ihutai is the largest semi-enclosed shallow estuary in Canterbury and remains one of New Zealand's most important coastal wetlands. It is well known as an internationally important habitat for migratory birds, and it is an important recreational playground and educational resource. It was once highly valued for mahinga kai.
The Canterbury Bight is a large bight on the eastern side of New Zealand's South Island. The bight runs for approximately 135 kilometres (84 mi) from the southern end of Banks Peninsula to the settlement of Timaru and faces southeast, exposing it to high-energy storm waves originating in the Pacific Ocean. The bight is known for rough conditions as a result, with wave heights of over 2 metres (6.6 ft) common. Much of the bight's geography is shaped by this high-energy environment interacting with multiple large rivers which enter the Pacific in the bight, such as the Rakaia, Ashburton / Hakatere, and Rangitata Rivers. Sediment from these rivers, predominantly Greywacke, is deposited along the coast and extends up to 50 kilometres (31 mi) out to sea from the current shoreline. Multiple hapua, or river-mouth lagoons, can be found along the length of the bight where waves have deposited sufficient sediment to form a barrier across a river mouth, including most notably Lake Ellesmere / Te Waihora and Washdyke Lagoon
Southshore is an eastern coastal suburb within Christchurch, New Zealand. It is sited on a narrow 2.5 km (1.6 mi) long sandspit that runs along the eastern side of the Avon Heathcote Estuary. The suburb is 8 km (5.0 mi) eastwards from the city centre and 5 km (3.1 mi) south from New Brighton's main retail area. Before urbanisation, the area was predominantly swampland, bordered by large sand dunes which had some Māori presence. The area holds historical and cultural importance to local Māori iwi because of the large amounts of resources and seafood gathered in the area prior to European occupation.
Rākaihautū was the captain of the Uruaokapuarangi canoe and a Polynesian ancestor of various iwi, most famously of Waitaha and other southern groups, though he is also known in the traditions of Taitokerau, and in those of Rarotonga.
Browning Pass / Nōti Raureka is a mountain pass across the Southern Alps, on the South Island of New Zealand. The pass reaches an elevation of 1,411 metres (4,629 ft) above sea level, connecting the upper reaches of the Wilberforce River with the West Coast.
Waiau Glacier Coast Marine Reserve is a marine reserve of the West Coast Region of New Zealand's South Island. It covers an area of 4,641 hectares or 46 km2, from 11 km south from Kohuamarua Bluff near Ōkārito, to Omoeroa Bluff, and about 4 km out to sea.
Coopers Lagoon / Muriwai is a small coastal waituna-type lagoon in the Canterbury region of New Zealand, located approximately halfway between the mouth of the Rakaia River and the outlet of the much larger Lake Ellesmere / Te Waihora. While the present-day lagoon is separated from the nearby Canterbury Bight by approximately 100 metres (330 ft), the water of the lagoon is considered brackish and early survey maps show that, until recently, the lagoon was connected to the ocean by a small channel. The lagoon, along with the surrounding wetlands, has historically been an important mahinga kai for local Māori.
Motukarara is a locality to the northeast of Lake Ellesmere / Te Waihora in the Selwyn District of New Zealand. State Highway 75 passes through the centre of the village, connecting Christchurch with Akaroa and the Banks Peninsula. The Little River Branch, which operated between 1886 and 1962, ran through Motukarara, and is now a shared walkway and cycleway.
A waituna is a freshwater coastal lagoon on a mixed sand and gravel (MSG) beach, formed where a braided river meets a coastline affected by longshore drift. This type of waterbody is neither a true lake, lagoon nor estuary.
The Kaituna River is a small watercourse which drains the high ground on the Banks Peninsula before discharging into Lake Ellesmere / Te Waihora. It gives its name to a steep sheep grazed valley which provides access to the walking tracks and mountain tops of Mount Bradley and Mount Herbert / Te Ahu Pātiki.
