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The Ironstone Plateau (''jabal hadid'') is a region in the south and west of South Sudan. ==Topology and rainfall== The land in the south and west of South Sudan slopes down to the northeast from the Nile-Congo Divide towards the Bahr el Ghazal swamps. The divide is formed by a plateau rising above sea level, with some peaks that rise to . Rainfall is higher on the plateau than in the lower clay floodplains. The rainy season lasts from May until November. Annual rainfall is . The plateau drains into the floodplain through rivers that cross an ironstone peneplain and then spread out into deltas and swamps. The soils of the plateau have little capacity to hold water, so most of the run-off drains into the floodlands. The many streams draining the plateau have formed steep and narrow valleys. 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「Ironstone Plateau」の詳細全文を読む スポンサード リンク
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