Auflistung nach Mitwirkenden "Wiederhold, Helga"
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Coastal groundwater systems: mapping chloride distribution from borehole and geophysical data
Rahman, Mohammad Azizur; Zhao, Qian; Wiederhold, Helga; Skibbe, Nico; González, Eva
; Deus, Nico; Siemon, Bernhard
; Kirsch, Reinhard; Elbracht, Jörg (Grundwasser, 2021-01-21)
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 ... -
Current and future state of groundwater salinization of the northern Elbe-Weser region
González, Eva; Deus, Nico; Elbracht, Jörg; Azizur Rahman, M.; Wiederhold, Helga
(Grundwasser, 2021-11-11)
Salinization of the upper aquifer of the northern Elbe-Weser region almost extends to the surface. Chloride content exceeds 250 mg/l and the groundwater is therefore, according to the German Drinking Water Ordinance, not ... -
Geophysical methods help to assess potential groundwater extraction sites
Wiederhold, Helga; Kallesøe, Anders Juhl; Kirsch, Reinhard; Mecking, Rebekka
; Pechnig, Renate; Skowronek, Frank (Grundwasser, 2021-10-07)
Complex geology in glacial terrain makes groundwater exploration challenging for water supply companies. Abrupt lateral changes of geological conditions, for example, raise the risk of unsuccessful exploration drilling. ... -
Modellierung der küstennahen Grundwasserversalzung in Niedersachsen abgeleitet aus aeroelektromagnetischen Daten
González, Eva; Deus, Nico; Elbracht, Jörg; Siemon, Bernhard
; Steuer, Annika; Wiederhold, Helga
(Grundwasser, 2021-02-24)
Die Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) führte in den Jahren 2000–2014 umfangreiche (etwa 5900 km2) aerogeophysikalische Erkundungen an der niedersächsischen Nordseeküste durch. Die Aeroelektromagnetik ... -
Monitoring freshwater–saltwater interfaces with SAMOS – installation effects on data and inversion
Ronczka, Mathias; Günther, Thomas; Grinat, Michael; Wiederhold, Helga
(Near Surface Geophysics, 2020)
A major problem for the freshwater supply of coastal regions is the intrusion of saltwater into aquifers. Due to extensive extraction of freshwater to suffice increasing drinking water demands and/or in periods of reduced ...