Giza Elevation Survey and Water Table Measurements
GIZA ELEVATION AND GROUNDWATER DATA
(from published geophysical surveys and archaeology)
ELEVATION REFERENCE POINTS (metres above sea level):
Great Pyramid base: ~60m asl
Subterranean Chamber floor (~30m below base): ~30m asl
Descending Passage entrance (~17m above base): ~77m asl
King's Chamber (~43m above base): ~103m asl
CURRENT WATER TABLE (from geophysical surveys, 2019):
Near the Great Sphinx: +13-18m asl
Southeast of Khafre: +22-40m asl
South of Menkaure: +45-58m asl
Nazlet El-Samman suburb: +17m asl
CURRENT: The Subterranean Chamber floor (+30m) is ~15m ABOVE the average water table (+15m). But in the elevated areas south of Khafre, the water table reaches +40-58m, which IS above the chamber.
CURRENT NILE AT GIZA:
Flood: ~20-22m asl
The Khufu/Ahramat branch is now completely dry.
SOURCE: Shallow geophysical techniques to investigate the groundwater table at the Great Pyramids of Giza (Geoscientific Instrumentation, 2019)
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