Chemical fingerprints of hydrological compartments and flow paths at La Cuenca, western Amazonia

  • A forested first-order catchment in western Amazonia was monitored for 2 years to determine the chemical fingerprints of precipitation, throughfall, overland flow, pipe flow, soil water, groundwater, and streamflow. We used five tracers (hydrogen, calcium, magnesium, potassium, and silica) to distinguish “fast” flow paths mainly influenced by the biological subsystem from “slow” flow paths in the geochemical subsystem. The former comprise throughfall, overland flow, and pipe flow and are characterized by a high potassium/silica ratio; the latter are represented by soil water and groundwater, which have a low potassium/silica ratio. Soil water and groundwater differ with respect to calcium and magnesium. The groundwater-controlled streamflow chemistry is strongly modified by contributions from fast flow paths during precipitation events. The high potassium/silica ratio of these flow paths suggests that the storm flow response at La Cuenca is dominated by event water.

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Author:Helmut Elsenbeer, Andreas Lack, Keith Cassel
Series (Serial Number):Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (paper 047)
Document Type:Postprint
Year of Completion:1995
Publishing Institution:Universität Potsdam
Release Date:2008/03/26
Tag:Chemistry of fresh water; Runoff and streamflow; Weathering
Source:Water Resources Research. - 31 (1995), 12, p. 3051 - 3058. - ISSN 0043-1397
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geoökologie
Extern / Extern
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Licence (German):License LogoKeine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht
Notes extern:
first published in:
Water Resources Research - 31 (1995), 12, p. 3051 - 3058
ISSN: 0043-1397