Australian Digital Theses Program

Thesis Details
Title	Stochastic Disaggregation of Daily Rainfall for Fine Timescale Design Storms
Author	Mahbub, S. M. Parvez Bin
Institution	Central Queensland University
Date	2008
Abstract	Rainfall data are usually gathered at daily timescales due to the availability of daily rain-gauges throughout the world. However, rainfall data at fine timescale are required for certain hydrologic modellings such as crop simulation modelling, erosion modelling etc. Limited availability of such data leads to the option of daily rainfall disaggregation. This research investigates the use of a stochastic rainfall disaggregation model on a regional basis to disaggregate daily rainfall into any desired fine timescale in the State of Queensland, Australia. With the incorporation of seasonality into the variance relationship and capping of the fine timescale maximum intensities, the model was found to be a useful tool for disaggregating daily rainfall in the regions of Queensland. The degree of model complexity in terms of binary chain parameter calibration was also reduced by using only three parameters for Queensland. The resulting rainfall Intensity-Frequency-Duration (IFD) curves better predicted the intensities at fine timescale durations compared with the existing Australian Rainfall and Runoff (ARR) approach. The model has also been linked to the SILO Data Drill synthetic data to disaggregate daily rainfall at sites where limited or no fine timescale observed data are available. This research has analysed the fine timescale rainfall properties at various sites in Queensland and established sufficient confidence in using the model for Queensland.
Thesis	01Front.pdf 92.1 Kb 02Chapter1.pdf 22.3 Kb 03Chapter2.pdf 55.2 Kb 04Chapter3.pdf 193.6 Kb 05Chapter4.pdf 68.2 Kb 06Chapter5.pdf 2435.5 Kb 07Chapter6.pdf 231.0 Kb 08Chapter7.pdf 179.9 Kb 09Chapter8.pdf 170.1 Kb 10Chapter9.pdf 25.6 Kb 11References.pdf 28.9 Kb 12Whole_Mahbub_ME_Thesis_2008_Stochastic_Disaggregation_Daily_Rainfall.pdf 3371.1 Kb