Kaipara Harbour
 Map of Kaipara Harbour
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Kaipara Harbour main channel
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Proposed cable and turbines
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Kaipara Harbour is a large enclosed harbour estuary complex on the north western side of the North Island of New Zealand. The northern part of the harbour is administered by the Kaipara District and the southern part is administered by the Auckland Council. The local Māori tribe is Ngāti Whātua.
By area, the Kaipara Harbour is one of the largest harbours in the world. It covers 947 square kilometres (366 sq mi) at high tide, with 409 square kilometres (158 sq mi) exposed as mudflats and sandflats at low tide.
According to Māori tradition, the name Kaipara had its origins back in the 15th century when the Arawa chief, Kahumatamomoe, travelled to the Kaipara to visit his nephew at Pouto. At a feast, he was so impressed with the cooked root of the para fern, that he gave the name Kai-para to the district. "Kai" means food in the Māori language.
The harbour extends for some 60 kilometres (37 mi) from north to south. Several large arms extend into the interior of the peninsula at the northeast of the harbour, one of them ending near the town of Maungaturoto, only ten kilometres (6 mi) from the Pacific Ocean coast. The harbour has extensive catchments feeding five rivers and over a hundred streams, and includes large estuaries formed by the Wairoa, Otamatea, Oruawharo, Tauhoa (Channel) and Kaipara. A number of small islands off the shoreline are connected to the mainland by mudflats at low tide.
The Kaipara Harbour is broad and mostly shallow, as it is formed from a system of drowned river valleys. The harbour shoreline is convoluted by the entry of many rivers and streams, and is about 800 kilometres (500 mi) long, being the drainage catchment for about 640,000 ha of land.
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