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Behaviour of Chemical Solutes During a Storm in a Rainforested Headwater Catchment by Catherine Grimaldi; Michel Grimaldi; Antoine Millet; Thierry Bariac; Jacques Boulègue is a Environmental Science article available to read on EtoBox.

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## Abstract The aim of this study is to identify, in a small catchment area located within a tropical forest, the pedological compartments in which the export of nutrients and chemical erosion of solutes occur during a stormflow event. The catchment area displays two types of lateral flow: (i) overland flow at the surface of the soil in the litter and root mat and (ii) groundwater flow in a macroporous subsurface horizon. We interpret the variations of stream‐water chemistry during a storm‐flow event using the separation of storm‐flow hydrograph data between overland and groundwater flow, and (Cl^−^) as a chemical parameter characterizing the residence time of water in the soil. It appears that K^+^ especially was released into the throughfall, whereas Ca^++^, Mg^++^ and Na^+^ were clearly released from the litter. K^+^ disappeared rapidly from soil solution, whereas Ca^++^ and Mg^++^ were more progressively absorbed by the vegetation. The Ca^++^ and Mg^++^ contents in groundwater increased with increasing residence time owing to the transpiration of trees. The export of H~4~SiO~4~ in the overland flow was moderate, i.e. 24% of total H~4~SiO~4~ export in the stream flow, as overlan

Who reads Behaviour of Chemical Solutes During a Storm in a Rainforested Headwater Catchment?

Author

Catherine Grimaldi; Michel Grimaldi; Antoine Millet; Thierry Bariac; Jacques Boulègue

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0885-6087)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)