Publication Date:
2023-08-17
Description:
Information on chloride (Cl) distribution in aquifers is essential for planning and management of coastal zone groundwater resources as well as for simulation and validation of density-driven groundwater models. We developed a method to derive chloride concentrations from borehole information and helicopter-borne electromagnetic (HEM) data for the coastal aquifer in the Elbe-Weser region where observed chloride and electrical conductivity data reveal that the horizontal distribution of salinity is not uniform and does not correlate with the coastline. The integrated approach uses HEM resistivity data, borehole petrography information, grain size analysis of borehole samples as well as observed chloride and electrical conductivity to estimate Cl distribution. The approch is not straightforward due to the complex nature of the geology where clay and silt are present. Possible errors and uncertainties involved at different steps of the method are discussed.
Description:
Interreg VB North Sea Region Programme
Description:
Leibniz-Institut für Angewandte Geophysik (3464)
Keywords:
ddc:551.49
;
Helicopter-borne electromagnetics
;
Coastal aquifer
;
Chloride distribution
;
Groundwater electrical conductivity
;
Formation factor
;
Hubschrauber-Elektromagnetik
;
Küstenaquifer
;
Chloridverteilung
;
Elektrische Leitfähigkeit des Grundwassers
;
Formationsfaktor
Language:
English
Type:
doc-type:article
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