The standard is intended to be applied for geohydrological research for geotechnics in the ground layers below the phreatic level. Comments 1. NEN 5766 states which provis ons must be made for taking groundwater samples for chemical analyses. 2. The monitoring well appears to have a better response in reasonably to well-permeable layers, such as sand, gravel, sandy and gravelly layers, than in cohesive soil layers. The response depends on the amount of water required for the measurement result. The amount of water that becomes available is determined by the permeability of the soil and the internal diameter of the ris r.
NEN 5120-1991 history
1991NEN 5120-1991 Geotechnics - Determination of hydraulic heads of groundwater by means of observation wells