“…It consists of a number of reasons, including corrosion of casing pipes (Banaś et al, 2007;Biernat et al, 2010b;Fytikas and Ungemach, 2010;Wright and Chilingarian, 1989), and most of all the silting-up of the reservoir layer (Biernat et al, 2010c;Wright and Chilingarian, 1989). As a result of progressive clogging the narrowing of the inner diameter of the absorbent hole occurs, clogging the active filters zones, ridging and reservoir rocks (Barkman and Davidson, 1972). All this leads to clogging of the pores and cracks of the aquifer level with solid particulates, and thus reduction of the absorption borehole areas and reservoir rock.…”