In the northern Nile Valley, environmental changes have occurred over millennia, impacting human habitation patterns. During the African Humid Period, the Sahara transformed into a savannah-like environment, drawing people away from the wet, inhospitable Nile Valley. A network of ancient Nile branches is now being uncovered, shedding light on the region’s hydro-geomorphological history. The discovery of the Ahramat Branch, an ancient river channel near the pyramids from the Old Kingdom to the Second Intermediate Period, provides insight into why the pyramids were built in specific areas. Geophysical surveys and sediment cores confirm the existence of this ancient waterway, suggesting its importance to the ancient Egyptian civilization.
https://www.nature.com/articles/s43247-024-01379-7