| |
CRC PUBLICATIONS |
Generation of Spatially Averaged Daily Rainfalls for the Yarra Region
Lionel Siriwardena,
Ratnasingham Srikanthan
Publication Type:
Working Document
This is a publication of the current CRC for Catchment Hydrology
CRC Program:
Climate Variability
|
Publication Keywords:
|
Abstract / Summary:
This document describes the data preparation and the generation of areal average rainfall for the Yarra catchment. Two daily rainfall generation models, the Transition Probability Matrix (TPM) model and a modified Wang-Nathan Model (WNM), were used to derive spatially averaged daily rainfall sequences for a region encompassing the Yarra catchment in Victoria, one of the five focus catchments in the CRC for Catchment Hydrology. The performance of the two data generation models was evaluated with respect to their ability to preserve various important rainfall characteristics at daily, monthly and annual time scales.
It was shown that the modified WNM is superior to the TPM model with respect to preserving the mean, standard deviation and skew of the historic rainfall at daily, monthly and annul time scales. Dry spell and wet spell characteristics are modelled satisfactorily by both models with slightly improved performance with the modified WNM. However, both models are incapable of preserving the monthly variation of serial correlation.
Overall, the modified Wang-Nathan Model is shown to be the better daily generation model based on testing carried out for the Yarra region.
This working document is available for downloading and also available for purchase from the Centre Office.
 |
1 Download(s) |
|
|
|
|
|
|
|
|
Centre Office:
CRC for Catchment Hydrology
Dept of Civil Engineering
Building 60
Monash University Vic 3800
Tel: +61 3 9905 2704
Fax: +61 3 9905 5033
|
|
|
