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Posts tagged Lake Kainji

Vegetation Index Near Lakes Ghana and Kainji, Ghana and Nigeria

7.1N 0.1E

October 25th, 2011 Category: Lakes, Rivers, Vegetation Index

Ghana, Togo, Benin, Nigeria - October 24th, 2011

This FAPAR image shows the vegetation index of Ghana, Togo, Benin and Nigeria (left to right along the coast). Visible to the left is Lake Volta, in Ghana, and visible at the upper right is Lake Kainji, on the Niger River, in Nigeria.

The vegetation index is generally good (green) throughout the image. However, there are some areas of high photosynthetic activity (rusty red), particuarly in the vicinity of Lake Volta.

Lake Volta in Ghana and Lake Kainji in Nigeria

10.3N 4.5E

November 18th, 2010 Category: Lakes

Nigeria - November 9th, 2010

This image stretches from Ghana (left), across Togo and Benin, to Nigeria (center, right). Clouds dot the skies over the coast, while further inland the landscape can be seen changing from tropical rainforest to drier savannah as one moves northward.

Two lakes can also be observed: Kainji Lake, golden tan from sediments just right of the image center, and Lake Volta, in Ghana in the lower left corner. Kainji Lake is a reservoir on the Niger River in western Nigeria, formed by the Kainji Dam. Lake Volta, located completely within Ghana, is the largest reservoir by surface area in the world, and the fourth largest one by water volume. It is formed by the Akosombo Dam.

Vegetation Index of Ghana, Togo, Benin and Nigeria

10.3N 4.6E

November 30th, 2009 Category: Climate Change, Lakes

Nigeria, Benin, Togo & Ghana - November 17th, 2009

Nigeria, Benin, Togo & Ghana - November 17th, 2009

This FAPAR image stretches along the coast of Africa, from Ghana (left), across Togo and Benin, to Nigeria (right). FAPAR stands for Fraction of Absorbed Photosynthetically Active Radiation, which corresponds to the¬† area’s vegetation index.

In FAPAR images, the color spectrum over land runs from red (1.0), to green, to yellow and white (0.0), while bodies of water, such as Lake Volta in Ghana  (lower left) and Lake Kainji in Nigeria (center), generally appear blue.

High photosynthetic activity is present in dark red regions, such as those along the coast here. Green areas are also productive. Yellow to white areas, on the other hand, indicate a low degree of photosynthetic activity. Here, the more photosynthetically active green areas gradually give way to less activa yellow and white zones as one approaches the drier Sahel, south of the Sahara desert.