Salinisation map 2014/2017 optimistic (mTAW)

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Dataset information

Country of origin
Updated
Created
Available languages
French
Keywords
Ondergrond, Databank Ondergrond Vlaanderen, DOV, VMM, Vlaanderen
Quality scoring
280

Dataset description

The map, based on the 2014 and 2017 helicopter measurements, shows an optimistic estimate of the depth of the interface between fresh and brackish groundwater in meter TAW. Taking into account the uncertainty on the measurements, two versions of the salinisation map were drawn up: 1. A conservative estimate of the depth of the boundary is based on a 95 % probability of finding fresh groundwater above this boundary. 2. An optimistic estimate of the depth of the boundary, assuming a 89 % chance of finding fresh groundwater above this boundary. Fresh water means conductivity less than 2000 µS/cm. It is appropriate to consult both interfaces to make an estimate of the fresh-breaking water distribution at a given location. In addition, the data points are available (‘salination map_2014_helikopter measurements’ and ‘salination map_2017_helikopter measurements’) so that it can be verified where effectively measured and interpolated. The data points are located on flight lines where a vertical profile can be consulted with a view of the bulk resisitiveit for the measurements from 2014 and with display of salinity, bulk resistivity, lithology and stratigraphy for the measurements from 2017. On the profiles the boundary between fresh and brackish (optimistic and conservative) and between brackish and salt groundwater is visible. The boundary between brackish and salt groundwater is defined as 25000 µS/cm.
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