The dynamics of groundwater chemistry in unconsolidated aquifers: the Salland section

The stability of groundwater flow systems in unconfined sandy aquifers in the Netherlands

“…Table 2 lists the calibrated hydraulic conductivities for the different geological formations in the study area. The calibrated values closely resemble the values found in previous modelling studies (Hoogendoorn, 1990;Vissers et al, 1999), except for the hydraulic conductivity for the ice-pushed ridge. The apparently low calibrated conductivity for the ice-pushed ridge is probably due to the pushed layers that 1965 1970 1975 1980 1985 1990 1995 2000 2005 Year 0 The stability of groundwater flow systems in unconfined sandy aquifers in the Netherlands cause high anisotropy and resistance in unknown directions.…”

“…Frapporti et al, 1995;Vissers et al, 1999) have shown that considerable volumes of the unconfined aquifer in the study area are affected by contaminants from agricultural sources. To identify the contaminant source areas and to assess the future contaminant dispersion, knowledge of the current groundwater flow pattern is especially valuable, since widespread diffuse pollution commenced in the 1950s, after the construction of the artificial drainage networks.…”