Analysis of loss values for Australian rural catchments to underpin ARR guidance

Abstract

As part of ARR Project 6, loss values were derived for a range of events on 38 rural catchments from across Australia. Based upon an earlier pilot study, the IL/CL and SWMOD loss models were selected for analysis. Loss values were estimated for each loss model for more than 1,000 events. The loss values are presented as both median values for each catchment and also as empirical distributions. The large data set allowed an investigation of how loss varies with rainfall characteristics including, event severity and antecedent rainfall. A range of catchment characteristics was also explored to see whether they could explain the variability in the derived loss values. Where possible, regional p..