If withdrawals were moderate, groundwater supplies would remain constant, since they are regularly renewed by rain that slowly seeps through to these underground reservoirs.
Kui põhjavett mõõdukalt tarbida, siis jääksid selle varud muutumatuks, kuna need taastuvad pidevalt tänu vihmaveele, mis imbub aeglaselt läbi pinnase nende maa - aluste reservuaarideni.