Effect of weather variables on c.c.s. at Tully simulated by the AUSCANE model

In the past three years, experimental projections of c.c.s. levels during the crushing season have been made for Tully Mill. These projections have shown the importance of rainfall amounts and distribution prior to and during the crushing season in affecting c.c.s. levels. They have highlighted the difficulty of making season projections of c.c.s. levels without making some attempt at seasonal projections of rainfall as well. Nevertheless, the availability of historical data has enabled the authors to determine the mean and range of weather effects on c.c.s. levels during the crushing season. This paper reports on the analysis of the effect of rainfall at Tully on c.c.s. levels over the period 1979-1990 using the AUSCANE model to calculate weekly values. This has involved re-calibration of the AUSCANE model based on greater understanding of the factors influencing c.c.s. levels.