Befähigungsprüfung Brunnenmeister Practice Questions - Befähigungsprüfung Brunnenmeister (Austria) Exam

An unconfined aquifer is bounded above by an impermeable rock layer, while a confined aquifer is open directly to atmospheric precipitation. An unconfined aquifer has a free water table at atmospheric pressure (phreatic surface), whereas a confined aquifer is overlain by an impermeable confining bed (Aquitard/Grundwassernichtleiter) causing its piezometric surface (Druckspiegel) to rise above the aquifer roof. An unconfined aquifer contains exclusively artesian groundwater that overflows the ground surface, whereas a confined aquifer contains only stagnant vadose water. An unconfined aquifer has a hydraulic conductivity of zero, whereas a confined aquifer has infinite transmissivity.