Aspects of this topic are discussed in the following places at Britannica.
The coastal area is demarcated by a dense network of drowned valleys, called rias. The Bafatá Plateau is drained by the Geba and Corubal rivers. The Gabú Plain occupies the northeastern portion of the country and is drained by the Cacheu and Geba rivers and their tributaries. The interior plains are part of the southern edge of the Sénégal River basin. The uniform...
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