PT Journal AU Houben, G TI Annotated translation of “Die Wasserversorgung einiger Nordseebäder [The water supply of some North Sea spas]” by Alexander Herzberg (1901) SO Hydrogeology Journal PY 2018 BP 1789 EP 1799 VL 26 IS 6 DI 10.1007/s10040-018-1772-8 LA de DE seawater intrusion; Ghijben-Herzberg AB The publication “The water supply of some North Sea spas” by Alexander Herzberg in 1901 is a cornerstone of coastal groundwater research. It was fundamental to the development of the Ghijben-Herzberg principle, which describes the hydrostatic equilibrium between fresh and saline groundwater. Due to its age and the language barrier, the paper is often cited but probably rarely read. Therefore, the original paper has been translated from German into English, accompanied by an introduction and notes explaining the historical context. ER