Resumen de Características hidrogeoquímicas de las aguas subterráneas vertientes a la Ría de Huelva
Manuel Olías Álvarez, Carlos Ruiz Cánovas, Juan Carlos Cerón García, José Miguel Nieto Liñán
There exist two main aquifers which waters flow to the Ría of Huelva, the Ayamonte-Huelva andthe Almonte-Marismas aquifers. In this work the distribution of physical-chemical parameters andmajority ions in thesem two aquifers are studied. In the Ayamonte-Huelva aquifer pH and electrical conductivity of water are slightly higher than in the Almonte-Marismas aquifer, probably due tothe greater abundance in the former of fine-grained minerals and a longer water-rock contact,although exist several points at the North with low salinity. In the Almonte-Marismas aquifer thereare two groups of wells. The first group situated on sands, has sodium-chloride waters and low pH(approximately 5.5) and electrical conductivity (below 1 mS/cm). The second group of wells, located on sandy silts, presents higher pH and electrical conductivy and calcium-bicarbonate or mixedtype of water.
