|
The Yellala Falls (''Rapides de Yelala'' or ''Chutes Yelala''; also spelled as ''Ielala'') are a series of waterfalls and rapids on the Congo River just upstream from Matadi in the Democratic Republic of the Congo. The falls are the lowest of a long series of rapids that render the river unnavigable, forcing colonial explorers to travel by foot as far as the Stanley Pool upstream. The Congo is the third largest river in the world by volume of water discharged, and the deepest in the world. The section of river that ends with the Yellala falls has over 300 species of fish, many found nowhere else. ==Location== The region drained by the Congo River covers one eighth of Africa, including both tropical rain forest and savanna, much of it in a huge, shallow basin. The present system of rivers seems to date from around five million years ago, not long ago on a geological time scale. At that time the Atlantic continental margin was lifted up and formed a barrier between the basin and the sea. A large lake formed before the Congo River broke through this barrier, running through a narrow, rocky channel about long from Kinshasa to Matadi. The river is navigable both above and below this stretch, called the lower Congo. The upper portion of the Lower Congo starts with the steep Livingstone Falls just below Kinshasa and continues for through a number of smaller rapids. The central portion of about is navigable, at times lake-like and at times narrow and as deep as . The lower portion of about is the steepest, with huge rapids at the Inga Falls and again at the Yellala falls, after which the river is navigable to the ocean. About of water flows over the falls each second. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yellala Falls」の詳細全文を読む スポンサード リンク
|