Staircase down to a passage, usually in a temple, leading to the Nile. During inundation, the maximum level could be marked on the staircase as a means of assessing the future yield of the land.
A place to measure the level height of the Nile water. En: Nile meter.
Staircase descending into the Nile and marked with levels above low water; used for measuring, and in some cases recording, inundation levels. The most famous are on Elephantine island and on Roda island in Cairo.