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Archive for November 16th, 2009

The Cook Inlet Between the Alaska Range and the Kenai Peninsula, USA

58.9N 153.1W

November 16th, 2009 Category: Rivers

Alaska, USA - October 7th, 2009

Alaska, USA - October 7th, 2009

The Cook Inlet, stretching 180 miles (290 km) from the Gulf of Alaska to Anchorage in south-central Alaska, is visible in this orthorectified image between the Alaska Range on the state’s mainland (above) and a low-laying area of the Kenai Peninsula (below).

The watershed of the Cook Inlet covers about 100,000 km² of southern Alaska, east of the Aleutian Range and south of the Alaska Range, receiving water from its tributaries the Knik River, the Little Susitna River, and the Susitna and Matanuska rivers.  Here, the mouths of several rivers and streams are visible on the northwestern shoreline, and the ASAR imagery makes it possible to observe water currents in the inlet, flowing southward.

Lake Kariba on the Border of Zambia and Zimbabwe

16.9S 27.9E

November 16th, 2009 Category: Lakes

Zambia and Zimbabwe - October 7th, 2009

Zambia and Zimbabwe - October 7th, 2009

Lake Kariba, lying on the border between Zambia (above) and Zimbabwe (below) is the largest man-made lake and reservoir by volume located on the Zambezi River. It is located about halfway between the river’s source and mouth, about 1300 kilometers upstream from the Indian Ocean.

Lake Kariba was filled between 1958 and 1963 following the completion of the Kariba Dam at its northeastern end, flooding the Kariba Gorge on the Zambezi River and displacing large numbers of the local Tonga people.

The lake is over 220 kilometers (140 mi) long and up to 40 kilometers (20 mi) in width. It covers an area of 5,580 square kilometers (2,150 sq mi) and its storage capacity is an immense 185 cubic kilometers (44.4 cu mi). The mean depth of the lake is 29 meters (95 ft); the maximum depth is 97 meters (320 ft).

The enormous mass of water (approximately 180,000,000,000,000 kilograms, or 200 billion tons) is believed to have caused induced seismicity in the seismically active region, including over 20 earthquakes of greater than 5 magnitude on the Richter scale.

Mountains South of China-Kyrgyzstan Border in the Tarim Basin – November 16th, 2009

40.6N 80.3E

November 16th, 2009 Category: Image of the day, Lakes

China - October 22nd, 2009

China - October 22nd, 2009

In this orthorectified image, long mountain ridges south of the China-Kyrgyzstan border can be seen north of Qianniao Lake in Tarim Basin in western China’s Xinjiang Uyghur Autonomous Region. The ridge running towards the lake from the bottom left corner reaches heights of around 1400 meters, while some of those farther north exceed 3000 meters.

Many of the lower-laying areas are dominated by desert, although some agriculture appears to be present near the lake. The lake is most likely fed by the Khotan River, which flows across the Taklamakan Desert empties itself into the Tarim River. Because the river is fed by melting snow from the mountains, it only carries water during the summer and is dry the rest of the year. The Khotan river bed provides the only transportation system across the Tarim Basin.