Salinisation map 2014/2017
Description
The map, based on the helicopter measurements of 2014 and 2017, shows an estimate of the depth of the interface between fresh and brackish groundwater in meters relative to ground level. Taking into account the uncertainty of the measurements, two versions of the salinisation map were drawn up: 1. A conservative estimate of the depth of the interface based on a 96% probability of fresh groundwater being found above this interface. 2. An optimistic estimate of the depth of the interface based on an 89% probability of fresh groundwater being found above this interface. Fresh water means conductivity less than 2000 μS/cm. It is advisable to consult both interfaces in order to estimate the freshwater distribution at a particular location. In addition, the data points are available (‘salination map_2014/2017_helicopter measurements’) so that it can be traced where effective measurements were taken and where interpolation was carried out. The data points are on flight lines where a vertical profile can be consulted with display of salinity, bulk resistivity, lithology and stratigraphy. 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 saline groundwater is defined as 25000 μS/cm. Due to buildings and other obstacles, certain zones within the coastal and polder area could not be measured. For these areas one can fall back on the salinisation map from 1974.
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Tags
- verziltingskaart-2014-2017
- grondwater
- vmm
- vlaanderen
- hydrogeologie
- geofysisch-onderzoek
- grondwaterkwaliteit
- grondwaterbescherming
- ondergrond
- dov
- verzilting-van-water