RT Journal Article T1 Caracterización hidroquímica de los arroyos que vierten a la Ría de Huelva T1 Hydrochemical characterisation of streams draining into the Ría of Huelva A1 Ruiz Cánovas, Carlos A1 Olías Álvarez, Manuel A1 Cerón García, Juan Carlos A1 Nieto Liñán, José Miguel AB The estuary known as Ría of Huelva receives the flow of two rivers intensely affected by acid mine drainage(AMD), the Odiel and Tinto rivers. The aim of this work is to evaluate the quality and the seasonal variationsof the surface waters, no affected by AMD, which drain into the Ría of Huelva. We carried out a samplingcampaign during one year in seven streams which drain an agricultural area with some small villages. Thehidrochemistry of these streams depends on the lithology of the catchment and anthropogenic inputs.The seasonal dilution of organic discharges and the leaching of nitrates from agricultural activities are themain parameters affecting the quality of the water of these streams PB Sociedad Geológica de España YR 2004 FD 2004 LK http://hdl.handle.net/10272/8826 UL http://hdl.handle.net/10272/8826 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 2 jun 2026