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sur le développement des zones arides et semi-arides

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University of Melbourne (1972)

Salting on dryland farms in North-Western Victoria

Rowan, J. N

Titre : Salting on dryland farms in North-Western Victoria

Auteur : Rowan, J. N

Université de soutenance : University of Melbourne

Grade : Masters Research thesis 1972

In semi-arid north-western Victoria saltpans developing on farms are associated with seepage of rainwater and of water from earthen channels, and with a consequent rise of groundwaters from beneath the mantle of soils. Seepage is most active on land with E-W. dunes, and it has increased through the replacement of deep-rooted native vegetation with crops, pastures and fallows. As yet saltpans have developed on only a small proportion of low sites where groundwaters or clays of low permeability lie unusually close to the surface. The extent to which production on interdune flats is being reduced by rising salinity of subsoils is unknown. Of most significance is a rise of groundwaters causing large saltpans to develop in several districts. Here there is a need to dry out the soils on a district rather than a farm basis, using deep-rooted pastures. Information is urgently needed on the placement and movement of groundwaters


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