Title

Seasonal streamflow forecasting in eastern Australia and the El Niño-Southern Oscillation

Document Type

Article

Abstract

Previous studies have identified a strong link between climate variability in Australia and the El Niño–Southern Oscillation (ENSO). This paper describes the development and use of a seasonal streamflow forecast model based on an optimal linear combination of forecasts derived from climatology, persistence, the Southern Oscillation index (SOI), and equatorial Pacific sea surface temperatures (SST). The model builds on the work of the Australian Bureau of Meteorology and that of other researchers who have investigated southeast Australian rivers. The model is tested using 66 years of unimpaired streamflow data from 10 eastern Australian catchments. Results from testing the model further support the ENSO-hydroclimate link, showing that eastern Australia generally receives below normal streamflow during El Niño conditions and above normal streamflow during La Niña conditions. In southeast Australia the SOI is a better predictor for July–September and October–December streamflow and the SST a better predictor of January–March and April–June streamflow. For many of the seasons and stations, the skill associated with the cross-validation forecast is better than that drawn from the baseline condition of climatology.

Disciplines

Climate | Environmental Sciences | Fresh Water Studies

Comments

24th Hydrology & Water Resources Symposium Proceedings. 373-378, 24-28 November 1997, Auckland, New Zealand. New Zealand Hydrological Society and the National Committee on Water Engineering of the Institution of Engineers, Australia.
Presented at: 24th Hydrology & Water Resources Symposium, 24-28 November, Auckland, New Zealand

Permissions

Use Find in Your Library, contact the author, or use interlibrary loan to garner a copy of the article. Publisher copyright policy allows author to archive post-print (author’s final manuscript). When post-print is available or publisher policy changes, the article will be deposited

Publisher Citation

Piechota, T. C., F. H. S. Chiew, J. A. Dracup, and T. A. McMahon (1998), Seasonal streamflow forecasting in eastern Australia and the El Niño–Southern Oscillation, Water Resour. Res., 34(11), 3035–3044, doi:10.1029/98WR02406.