Lithological and hydrological controls on water composition: evaporite dissolution and glacial weathering in the south central Andes of Argentina (33-34° S)

LEÓN JG; PEDROZO, F.L.

HYDROLOGICAL PROCESSES

JOHN WILEY & SONS LTD

Lugar: Londres; Año: 2014

0885-6087

Lithological and hydrological influence on fluvial physical and chemical erosion was studied in a glacierized sedimentary basin with high evaporite presence. Suspended particulate matter (SPM), total dissolved solids (TDS) and major ion concentrations were analyzed for two years of different hydrologic condition: i) 2009-2010, Q = 100% average; and ii) 2010-2011, Q = 60% average. Annual hydrograph was simple regime ? type with one peak in summer related to snow melting. The intra-annual SPM and TDS variations were directly and inversely associated to Q, respectively. Snow chemistry showed continental influence (Na+/Ca2+=0.17) and atmospheric input of TDS was