TY  - JOUR
A1  - Rahman, Mohammad Azizur
A1  - Zhao, Qian
A1  - Wiederhold, Helga
A1  - Skibbe, Nico
A1  - González, Eva
A1  - Deus, Nico
A1  - Siemon, Bernhard
A1  - Kirsch, Reinhard
A1  - Elbracht, Jörg
T1  - Coastal groundwater systems: mapping chloride distribution from borehole and geophysical data
Y1  - 2021-01-21
VL  - 26
IS  - 2
SP  - 191
EP  - 206
JF  - Grundwasser
DO  - 10.1007/s00767-021-00475-1
PB  - Springer Berlin Heidelberg
N2  - 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.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11012
ER  -