Author:
Clarke C. J.,Mauger G. W.,Bell R. W.,CSIRO R. J. Hobbs
Abstract
The interactions between land, vegetation, and climate are highly complex and
there are few demonstrations of the many potential combinations of treatments
which could be used to combat dryland salinity. For this reason, computer
simulations are used. This is the first of 2 papers that describe the results
of computer modelling of revegetation strategies to reduce land and water
salinisation in the western wheatbelt of Western Australia. A distributed
parameter, physically based, cellular, 2-layer, mathematical model was used to
simulate the effect of a variety of treatments. Modelling predicted that if
current land use continues, 40% of the cleared area will become saline.
Modelling replacement of the annual pasture with a deep-rooted perennial
pasture or pristine native vegetation prevented the onset of salinity, but
block or alley treatments always left a significant residual saline area and
seepage even at the highest density of revegetation modelled. Combining
remnant vegetation in pristine condition, 60-m-spaced tree belts and
deep-rooted perennial pasture in mainly the upper mid-slope bays between tree
belts reduced saline land to 10% of the cleared area and seepage volume
to 30% of the untreated case. The second paper describes the impact of
faults on treatment effectiveness.
Subject
Earth-Surface Processes,Soil Science,Environmental Science (miscellaneous)
Cited by
8 articles.
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