Weathering, biomass production and groundwater Chemistry in an area of dominant anthropogenic Influence, the chaves-vila pouca de aguiar region, North of portugal

摘要

Using a combination of a grouping algorithm and a geochemical mole balance algo- rithm, we could indentify and quantify the contributions make by water-rock and water-biomass interactions to the composition of shalow groundwaters in northern Portugal, in an area with a sizable anthropogenic input (the Chaves-Vila Pouca de Aguiar region). The first algorithm, based on the mathematical concept of equivalent relations, allows for the grouping of water samples with similar chemistries.