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Definition of Ghyben-herzberg principal

Ghyben-herzberg principal Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
The principal states that where readily permeable aquifers exist in coastal zones, for every foot of water-table height above sea level, the freshwater-saltwater interface will be about 40 feet below sea level. The principle reflects the fact that freshwater is 1/40 less dense than sea water.