000			02162nam a22002897a 4500
003			ZW-GwMSU
005			20230413114621.0
008			230413b |||||||| |||| 00| 0 eng d
040			_aMSU _cMSU _erda
100			_aFARID, Intissar
245			_aHydrogeochemical processes affecting groundwater in an irrigated land in Central Tunisia
264			_aVerlag _bSpringer _c2013
336			_2rdacontent _atext _btxt
337			_2rdamedia _aunmediated _bn
338			_2rdacarrier _avolume _bnc
440			_aEnvironmental earth sciences _vVolume , number ,
520			_aDetailed hydrogeochemical investigation has provided new information concerning the major factors and mechanisms controlling the groundwater chemistry of Chougafiya basin. The hydrogeochemical characteristics of groundwaters comprise three main types: Cl–SO4–Ca, Cl–SO4–Na and Cl–Na. Hydrochemical characteristics based on the bivariate diagrams of major (Cl−, SO4 2−, NO3 −, HCO3 −, Na+, Mg2+, K+ and Ca2+) and some trace (Br− and Sr2+) ions, mineral saturation indices and hierarchical cluster analysis indicate different origins of groundwater mineralization. The water–rock interaction (dissolution of evaporitic minerals), followed by cation exchange reactions with clay minerals, constitute the main processes that control groundwater salinization. However, the chemical composition of brackish groundwater in the central and southern parts of the study area is influenced by a mixing process with Sabkhas salt groundwater. The mixing proportions inferred from chloride mass balance prove that the contribution of Sabkhas groundwater to Quaternary aquifer ranges between 2.7 and 9.1 %. These intrusion rates reflect the progress of the saltwater–freshwater interface, which is mainly controlled by the piezometric level variation and the distance to the Sabkhas.
650			_achougafiya basin
650			_aquaternary aquifer
650			_acontinental sabkhas
700			_aTRABELSI, Rim
700			_aZOUARI, Kamel
700			_aABID, Kamel
700			_aAYACHI, Mohamed
856			_uhttps://doi.org/10.1007/s12665-012-1788-7
942			_2lcc _cJA
999			_c161717 _d161717