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Abstract:
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(En)
In agricultural regions of Western Australia, salinity is spreading. This is because the area taken up by groundwater discharge is increasing as a result of increased groundwater recharge following the replacement of native vegetation systems by annual crops and pasture species. Attempts to reduce groundwater recharge are now being made as it is hoped that this will decrease the rate of land salinisation. At several sites, average recharge rates have been estimated to be from 2% to 13% of the average annu
ter hydrographs from the agricultural regions indicate that at some sites recharge does not occur as small amounts every year in a regular manner, but as infrequent, unpredictable, relatively large ©·pisodic' events. At such sites, relatively small incr
ses in the water use of annual crops and patures are unlikely to have a significant effect on the magnitude of large episodic pulses of recharge.
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