 While this theory was at first viewed with scepticism, it is now likely that Lake Suguta was part of a large drainage system that formed a headwater for the White Nile along the Pibor River and Sobat River which connected Lake Turkana with the Nile.Climate in tropical Africa was dry during the Last Glacial Maximum.In the early Holocene, an increase in the strength of the monsoon caused a wet period in northern Africa, the African Humid Period, and the sizes of numerous lakes in East Africa were larger during the early Holocene 15,000 - 5,000 years ago than today.