Regional Runoff Patterns Associated With Indian Ocean Subtropical High: A Case Study Over Arthur River Catchment

摘要

This study aims to explore the possible interaction between Indian Ocean subtropical high indices and Arthur river catchment (ARC), the north-western river of Tasmania, Australia, streamflow (May-August) by constructing a multi-linear regression model which explained 42.05% of ARC streamflow (May-August) and provide a large forecasting lead time. In this study, it is found that the variability in ARC streamflow associated with Indian Ocean subtropical high pressure (IOSHPS) with coupled of its east-west gradients (zonal) also qualitative and quantitative forecasts of ARC streamflow (May-August) are presented through conditional probability and combining the IOSH indices as predictors in multi-linear regression model respectively. It is found that 13 forecast values are correctly defining the observed ARC streamflow (May-August) out of 15 from 1997 to 2011. Analysis is performed on 61 years (1951-2011) available ARC streamflow observations. The conditional probability model correctly forecasted 12 years category of streamflow out of last 15 years (1997-2011) streamflow.