STREAMFLOW AND STREAM SALINITY IN A SMALL WATER-SUPPLY CATCHMENT IN SOUTHWEST WESTERN AUSTRALIA AFTER REFORESTATION

In the mid-1970s high salinities developed in the Padbury reservoir in southwest Western Australia due to the conversion of 80% of its catchment from native forest to farmland in previous decades. Between 1977 and 1983 some 70% of this farmland was planted with pines and eucalypts. Most of the slopes were reforested, but only some of the valleys. In 1978 a gauging station was established in the catchment to monitor the effect of reforestation on streamflow and stream salinity. Results obtained by the end of 1986 are presented here.