Hugman, RuiViegas, JoãoGois, AntónioCosta, LuisMonteiro, José PauloStigter, Tibor2018-01-242018-01-242015AUT: JPM01090;http://hdl.handle.net/10400.1/10325Groundwater supplies about 70% of the fresh water needs in Portugal with most of the aquifers occurring at the coastline, where more than 60% of the whole population dwells. The overexploitation of groundwater resources during the final decades of the 20th century, lead to a gradual decrease in water quality in many coastal aquifers of the Algarve, the southernmost region of Portugal.engconference object