摘要：differences in relation to each other; forexample, in their matrix (unconsolidatedsediments and sedimentary porous mediaaquifers vs fractured elements); theirhydraulic properties (groundwater flowsfrom a few millimetres per day in finegrainedsediments up to hundreds of metersper hour in karst terrains); interactions withother water bodies (absence or presence ofhydraulic connections with the sea, lakes,rivers or other aquifers); and in their waterchemistry.
