O Lago Fitri é um lago endorreico ou 'terminal' no sul do Saara. Os desertos têm tão pouca precipitação de chuva que os rios que os cruzam frequentemente não conseguem chegar ao mar, terminando em depressões na superfície do terreno, onde formam lagos.
(Note que a imagem esta girada, de modo que o norte está à esquerda, embaixo.) Águas lamacentas, amarelo-amarronzadas, assinalam o centro da bacia, com um anel de lamaçais marrom-escuros e vegetação queimada no leito exposto do lago, no norte (esquerda inferior).
A linha costeira tem uma fina linha de junco e vegetação de grama flutuante, que aparece em verde escuro na imagem. O geralmente seco Rio Wadi Batha deságua no Lago Fitri a partir do oeste (no topo da imagem).
Com o tempo, o fluxo de água no Wadi Batha criou um grande delta, que ocupa todo o terço superior esquerdo da imagem (em escala, o lago tem 23 km de extensão).
O Lago Fitri e seus arredores foi designado pela Convenção Ramsar como de importância internacional.
Lake Fitri is an endorheic or 'terminal' lake in
the southern Sahara. Deserts get so little rainfall that the rivers
passing through them often cannot reach the sea, instead ending at
depressions in the land surface where they form lakes.
(Note that the image is rotated so north is to the lower left.) Muddy, yellow-brown water marks the centre of the basin, with a ring of dark brown muds and burnt vegetation on the exposed lake floor to the north (lower left).
The shoreline supports a thin line of reeds and floating grass vegetation, which appears as dark green in the image. The usually dry Wadi Batha empties into Lake Fitri from the east (image top).
Over time, water flow in Wadi Batha has created a large delta, which occupies the entire top left third of the image (for scale, the lake is 23km long).
Lake Fitri and its surroundings have been designated under the Ramsar Convention as a wetland of international importance.
(Note that the image is rotated so north is to the lower left.) Muddy, yellow-brown water marks the centre of the basin, with a ring of dark brown muds and burnt vegetation on the exposed lake floor to the north (lower left).
The shoreline supports a thin line of reeds and floating grass vegetation, which appears as dark green in the image. The usually dry Wadi Batha empties into Lake Fitri from the east (image top).
Over time, water flow in Wadi Batha has created a large delta, which occupies the entire top left third of the image (for scale, the lake is 23km long).
Lake Fitri and its surroundings have been designated under the Ramsar Convention as a wetland of international importance.
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