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Geologically related variations in saturated hydraulic conductivity in the regolith of the western wheatbelt of Western Australia and its implications for the development of dryland salinity
Journal article   Peer reviewed

Geologically related variations in saturated hydraulic conductivity in the regolith of the western wheatbelt of Western Australia and its implications for the development of dryland salinity

C.J. Clarke, R.J. George, D.L. Bennett and R.W. Bell
Australian Journal of Soil Research, Vol.38(3), pp.555-568
2000
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Abstract

This is the first systematic study of geology-related saturated hydraulic conductivity differences in the regolith of the wheatbelt of Western Australia. Except for 2 rock types studied, much lower permeability in the pallid zone than in the underlying aquifer, is substantiated. Higher permeability in major faults than in the surrounding granite is confirmed, and this extends into the pallid zone. Mafic dykes have no significant differences in permeability to granite in the saprolite aquifer but it is arguable that the permeability of dykes in the pallid zone is greater than granite. Permeability of the Tertiary valley filling sandstone aquifer is higher than of the underlying granite and much higher than of the overlying claystone aquiclude. The results presented in this paper provide a basis for groundwater models to take into account differences in permeability between major faults and granite and within Tertiary sediments, which is necessary in order to improve predictions of salinity extent and treatment effectiveness.

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Citation topics
8 Earth Sciences
8.140 Water Resources
8.140.566 Groundwater Geochemistry
Web Of Science research areas
Soil Science
ESI research areas
Environment/Ecology
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