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In water well drilling, with both cable tool and direct or reverse circulation, it is necessary to produce a correct description of the grain size distribution in the subsoil of porous sediments. Guidelines are proposed which can be applied to describe the stratigraphy of the borehole, reaching a reasonable compromise between ease of use on site and a correct scientific approach. Adoption of the Guidelines allows an increase in the qualitative standard of the stratigraphic description and thus an improvement and greater reliability in the geological interpretation of the subsoil, above all from the sedimentological and hydrogeological points of view.

Proposal of Guidelines for field description and classification of porous sediments from water well drilling - in situ fast procedure - ver 1.0