The summer floods of the Nile River were so predictable that the Egyptian calendar was based on their rise and fall. Flooding on the Nile occurred from late June until late October. The floods brought nutrients and sediments beneficial to the nearby agricultural lands, making farming productive throughout the remainder of the year. Measuring scales called “nilometers” were placed along the river, and not only measured the river height but also served as a calendars.
A view of Amboseli National Park in Kenya, with Tanzania’s Mt. Kilimanjaro in the background. The snow on top of the mountain is disappearing due to global warming.