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Posts tagged Lake Victoria

Climate Change and Fluctuating Water Levels in Lake Victoria, East Africa – April 5th, 2013

1.2S 32.7E

April 5th, 2013 Category: Climate Change, Image of the day, Lakes

Uganda – April 3rd, 2013

Lake Victoria (below) is the second largest fresh water lake in the world and is shared by three East African States: Kenya (6%), Tanzania (52%) and Uganda (42%). The lake has a total length of 3,440 kms and 240 kms wide from East to West and is 1,134 meters above sea level with maximum depth of 82m. Its surface area is 68,870 km2, with a catchment area of 180,950 km2. The lake is generally shallow with maximum depth of 84 meters and mean depth of 40 meters.

Lake Victoria has historically had abundant fish catches; however, these have a positive correlation with the lake’s water level, which has been fluctuating due to climate change and human activities in the region. Catches reduced to between 60% and 70% during the current reduction of water level in Nyanza Gulf. There is increased pressure on land for agricultural use due to population pressure in the country, and increased demand for water related usage for socioeconomic development across the region (click here for more information).

Turkwel River Entering Lake Turkana, Kenya

1.4N 32.8E

December 10th, 2012 Category: Lakes, Rivers

Uganda and Kenya – December 4th, 2012

Several lakes can be seen by the Uganda-Kenya-Tanzania (clockwise from lower left) border area. Visible at the lower left is Lake Victoria, the largest lake in Africa. To its north is the irregularly shaped Lake Kyoga. In the upper right corner is Lake Turkana, colored by algal growth and sediments, some of which enter from the Turkwel River, which can be seen flowing across Kenya and into the southern part of the lake, on the western side.

Changes in Oxygen Levels in Lake Victoria

1.2S 32.7E

August 14th, 2012 Category: Lakes

Tanzania and Uganda – August 14th, 2012

This thumbnail image focuses on the jagged shoreline of the southern half of Lake Victoria, although the entire body of water can be observed upon opening the full image. The lake occupies a shallow depression in Africa and has a maximum depth of 84 metres (276 ft) and an average depth of 40 metres (130 ft). Its catchment area covers 184,000 square kilometers (71,040 sq mi). The lake has a shoreline of 4,828 kilometres (3,000 mi).

Lake Victoria receives almost all (80%) of its water from direct precipitation. Average evaporation on the lake is between 2–2.2 metres (6 ft 7 in–7 ft 3 in) per annum, almost double the precipitation of riparian areas.

The lake exhibits eutrophic conditions. In 1990–1991, oxygen concentrations in the mixed layer were higher than in 1960–1961, with nearly continuous oxygen supersaturation in surface waters. Oxygen concentrations in hypolimnetic waters (i.e. the layer of water that lies below the thermocline, is noncirculating, and remains perpetually cold) were lower in 1990–1991 for a longer period than in 1960–1961. The changes in oxygenation are considered consistent with measurements of higher algal biomass and productivity.

These changes have arisen for multiple reasons: successive burning within its basin, soot and ash from which has been deposited over the lake’s wide area; from increased nutrient inflows via rivers, and from increased pollution associated with settlement along its shores.

Plumes of Smoke from Wildfires Across Tanzania

6.5S 29.6E

July 7th, 2012 Category: Fires, Lakes

Tanzania – July 5th, 2012

Plumes of smoke from many wildfires can be visible across Tanzania, east of Lake Tanganyika (center), south of Lake Victoria (top right) and north of Lake Rukwa (tan, bottom right). Most of the plumes of smoke are blowing northward or northwestward. They tend to be thicker and more fanned out towards the south, indicating differences in wind strength and direction.

Lakes Victoria, Kyoga and Albert in Uganda

0.3N 32.5E

February 29th, 2012 Category: Lakes

Uganda- January 4th, 2012

This orthorectified wide-swath ASAR image shows several lakes in Uganda: Lake Victoria (bottom), Lake Kyoga (above center) and Lake Albert (upper left corner). The city of Kampala, the capital of Uganda and the largest city in the country, can be seen as a white area by the northern shores of Lake Victoria.

Lake Victoria is an African Great Lake and the largest lake on the continent by surface area, at 68,800 square kilometres (26,600 sq mi). It is the second largest freshwater lake by surface area in the world. Lake Kyoga is a large shallow lake complex of Uganda, about 1,720 km2 (660 sq mi) in area and at an elevation of 914 m. The Victoria Nile flows through the lake on its way from Lake Victoria to Lake Albert. Lake Albert is another one of the African Great Lakes – the seventh-largest lake in Africa, at about 160 km (100 mi) long and 30 km (19 mi) wide, with a maximum depth of 51 m (168 ft).