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Posts tagged Otago Region

Fertile Plains of New Zealand’s South Island

February 1st, 2010 Category: Vegetation Index

New Zealand - January 25th, 2010

New Zealand - January 25th, 2010

This FAPAR image shows much of the South Island of New Zealand. In such images, dark red areas indicate a high degree of photosynthetic activity and therefore high vegetation productivity. Green areas indicate good activity, while yellow zones have low activity.

Here, as one might expect, the high mountains of the Southern Alps show lower productivity. The most intense photosynthetic activity can be seen towards the southern tip of the island, in a region known as the Southland Plains.

The Southern Plains is a general name given to several areas of low-lying land in the South Island, separated by the rise of the Hokonui Hills in the north. It forms a sizeable area of the Southland Region and includes some of New Zealand’s most fertile farmland.

The Plains extend from the Waiau River in the west to the Mataura River which forms the border with Otago to the east. It can be divided into three broad areas: the Southland plain proper, the Waimea Plains and the lower Waiau Plain to the west near the Waiau River.

At their southern extreme the Waimea Plains become the Awarua Plain, a large area of marshy land which stretches from near Bluff to the foot of the Catlins in the far east. Between them, the lowlands around the Awarua Plain and Mataura River cover a further 2000 km².

Lakes Wakatipu and Te Anau, New Zealand – December 4th, 2009

45.4S 167.7E

December 4th, 2009 Category: Image of the day, Lakes, Rivers

New Zealand - October 22nd, 2009

New Zealand - October 22nd, 2009

Two large lakes near the southern tip of New Zealand‘s south island can be seen by the snow-capped Southern Alps. To the north, with a reversed “N” shape, is Lake Wakatipu, a finger lake in the southwest corner of Otago Region, near its boundary with Southland.

With a length of 80 kilometres, it is New Zealand’s longest lake, and, at 291 km², its third largest. It is at an altitude of 310 metres, towards the southern end of the Southern Alps.  The Dart River flows into the northern end, the lake then runs south for 30 kilometres before turning abruptly to the east. Twenty kilometres further along, it turns sharply to the south, reaching its southern end 30 kilometres further south, near Kingston.

The lake is drained by the Kawarau River, which flows out from the lake’s Frankton Arm, 8km east of Queenstown. Queenstown is on the northern shore of the lake close to eastern end of its middle section. The lake is very deep, its floor being as low as 100 metres below sea level.

To the southwest is the larger Lake Te Anau, covering an area of 344 km², making it the second-largest lake by surface area in New Zealand and the largest in the South Island. Lake Te Anau is, however, the largest lake in Australasia by fresh water volume.

The main body of the lake runs north-south, and is 65 km in length. Three large fiords form arms to the lake on its western flank: North Fiord, Middle Fiord and South Fiord. Several small islands lie in the entrance to Middle Fiord, which forks partway along its length into northwest and southwest arms. The lake lies at an altitude of 210 m, and since its maximum depth is 417 m, much of its bed lies below sea level.

Several rivers feed the lake, of which the most important is the Eglinton River, which joins the lake from the east, opposite the entrance to North Fiord. The outflow is the Waiau River, which flows south for several kilometres into Lake Manapouri. The town of Te Anau lies at the south-eastern corner of the lake, close to the outflow.

Most of the lake is within Fiordland National Park and the Te Wahipounamu World Heritage site. Other than the Te Anau township, the only human habitation close to the lake is the farming settlement of Te Anau Downs, close to the mouth of the Eglinton River. Between these two settlements the land is rolling hill country, but elsewhere the land is mountainous, especially along its western shore, where the Kepler and Murchison Mountains rise 1,400 m above the surface of the lake.