Soil water movement estimated from isotope tracers

Research output: Contribution to journalArticle

Abstract

The natural isotope oxygen-18 and artificially injected tritium are used for studying the percolation of soil water. Particle velocity, progression rate and soil moisture flux are distinguished from each other. Water particle velocities and seasonal groundwater recharge are determined in glacio-fluvial deposits and in till soils. In the glacio-fluvial deposits of the Uppsala Esker it is found that the groundwater recharge is distributed rather uniformly over the year, although high soil moisture flux near the ground surface is caused by single episodes. The travel time of a water particle from the ground surface to the groundwater level at about 4 m depth is two to three years. In the more heterogeneous moraine areas, the dispersion of the marked water is considerable. However, the origin of water recharging the groundwater can be determined. The vertical distance travelled by the fastest moving water particles in one year does not exceed 10 m.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Water Engineering
Original languageEnglish
Pages (from-to)497-520
JournalHydrological Sciences Journal
Volume32
Issue number4
Publication statusPublished - 1987
Publication categoryResearch
Peer-reviewedYes
Externally publishedYes