Research paper
Hydrogeochemistry of chloride in an upland catchment in mid-Wales

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Abstract

Data describing the variations in Cl concentration in bulk precipitation, soil waters and stream water for over six years at a remote upland site in mid-Wales, U.K. are presented. Throughfall and filter gauge data indicate that marine aerosols and cloud water are an important component of the atmospheric inputs to the site. Concentrations of Cl in bulk precipitation are highly variable over time but this variation is progressively damped through the soils to the streams. Trends in soil and stream water Cl concentrations over the period are attributed to the impact of climatological variations on the hydrology of the catchment. The effects of this trend on annual Cl mass balances are discussed and highlight the need for long-term catchment studies.

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