South Australian Growing Season Mean Rainfall
(April to November)
Comparison of model rainfall (derived from multiple linear regression based on physiographic features of Latitude, Altitude and Distance from coastline).
Model Rainfall = a + b*Latitude + c*Altitude + d* log(Distance to coast)
Correlation between observed and model is ~ 0.9. Dataset for regression analysis consists of observed mean rainfalls from Bureau of Meteorology stations. From the regression parameters, Model Rainfall for all of South Australia is calculated by the above equation. The Model Rainfall is then compared to the Bureau of Meteorology’s analysed, or derived, grid point data.
The Model Rainfall compares favourably. There are a number of applications for this technique - quality control of station data; and estimating changes in Rainfall due to changes in location.