1st International Conference on Rain Water Cistern Systems
Honolulu, Hawaii, USA - June 1982

Section 3: Design, Cost, And Policy

Page 144

Application of Gould Matrix Technique to Roof Water Storage

Terry L. Piggott
Queensland Institute of Technology, Australia

Ian J. Schiefelbein
Gutteridge, Haskins & Davey, Australia

Mark T. Durham
Telecom, Australia

Introduction

The dependence of many Australian homes on roof and tank rainwater collection systems. has been discussed in detail by Perrens (1975), Perrens used a monthly simulation model to relate roof area, storage capacity and demand to probability of failure at Armidale in New South Wales. He drew economic comparisons between extending the system capacity and buying water when the system failed to meet the required demand.

Durham (1980) and Schiefelbein (1981) used the Gould matrix technique (McMahon and Mein 1978) to determine probabilities of failure of a roof-tank system, rather than to rely on critical period methods. These studies were initially made for Brisbane and subsequently for a number of selected climatic zones within Queensland as part of a continuing programme.

This paper covers some aspects of the work initiated by Durham (1980) and continued by Schiefelbein (1981)

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