Topographic survey

Each groundwater monitoring location (head of High Density Polyethylene casing), soil borehole and trial pit location must be XYZ georeferentiated by means of a GPS during a topographic survey.

The coordinates of the piezometers as well as measured piezometric levels in each monitoring well will help to elaborate a map representing curves of equal piezometric pressure for an aquifer, which is necessary to predict or confirm groundwater flow direction before collecting soil and groundwater samples.

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