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22 nd Salt Water Intrusion Meeting: Salt Water Intrusion in Aquifers: Challenges and PerspectivesGROUNDWATER SALINIZATION RISK AT RECIFE (BRAZIL) DUE TOCLIMATIC CHANGESPAIVA, A. L. R. de; CABRAL; J. J. S. P.; MONTENEGRO, S. M. G. L.; COSTASOBRINHO, A. F.; DEMÉTRIO, J. G. A.alrpaiva@yahoo.comUNIVERSIDADE FEDERAL DE PERNAMBUCO (UFPE)Av. Acadêmico Hélio Ramos, s/n, Cidade Universitária, Recife – PE, BrazilAbstract. Recife city in Northeastern Brazil comprises a low flat land plain ( 2 to 10 metersabove mean sea level) crossed by several rivers, streams, channels and mangroves. At hightide, all these surface water elements mixed with sea water and salt concentration advancesseveral kilometers inland. Groundwater at Recife Metropolitan Region has been highlyexploited in the last three decades, the number of wells surpasses 12,000, piezometric levelsdecreased more than 50 meters at several locations and some wells present increasing saltconcentration. Several problems have been detected, such as poor technical wellconstruction, overexploitation, salinization process advances due to influence of mangroves,salinized paleochannels, old traped salt zones and salinization from rivers and streams atestuarine region. Sea level rise will increase groundwater hydraulic gradients towards land,perhaps some recharge areas will be covered and salinization risks will be much higher. Thisresearch discusses the salinization risk increase due to climatic changes and in special due tosea level rise.Keywords: sea level rise; climate change; Recife; salinization40