Migration of nutrients, pesticides and heavy metals in fractured clayey till

Autor:	J. Fredericia, P. R. Jølrgensen
Rok vydání:	1992
Předmět:	Pollutant Hydrology Macropore Groundwater flow Lessivage Soil science Geotechnical Engineering and Engineering Geology Soil water Earth and Planetary Sciences (miscellaneous) Clay minerals Diel vertical migration geographic locations Groundwater Geology
Zdroj:	Géotechnique. 42:538-538
ISSN:	1751-7656 0016-8505
DOI:	10.1680/geot.1992.42.3.538
Popis:	This study of fractured clayey till shows that the hydraulic activity of groundwater flow and the migration of pollutants from an orchard and from arable land are by far the most intensive in the upper 10 m of the till. In this zone dual porosity is developed as a result of desiccation and glacial jointing. Rapid leaching in the macropore structure is indicated by the distribution of tritium and chloride and by the vertical migration of the pesticides atrazine and simaeine through 5-6 m of clayey till over ten years. Additional colloidal transport of DDT, DDE and DDD is indicated by preferential migration of clay minerals and DDE in fractures.
Databáze:	OpenAIRE
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