Nilometer von Elephantine, Ancient water measurement structure at Satis Temple on Elephantine Island, Egypt.
The Nilometer at Satis Temple is a stone structure with stairs descending toward the river and markings carved into its walls. Ancient Egyptians used these graduated scales to track water levels throughout the year and during flood seasons.
This measurement system was built during the Old Kingdom and functioned for thousands of years. It became obsolete when the Aswan Dam was constructed in the 1960s, which changed how the Nile flooded.
Priests read the water levels here to decide how much tax farmers would pay each year. These measurements shaped how communities prepared for the annual flood and planned their agricultural work.
Access to this site is on Elephantine Island, which you reach by ferry from Aswan. The staircase is steep and descends close to the water, so wear sturdy shoes and exercise caution on the wet stones.
Because this nilometer stood at Egypt's southern border, priests could predict flood levels weeks in advance. These early warnings gave downstream communities precious time to prepare for the coming inundation.
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