3rd International Rainwater Cistern Systems Conference
Khon Kaen, Thailand - January, 1987

Section C: Design

Paper C.3

Rainwater Tank Supply for Households In South Australia Without Mains Water Supply

K. C. Tai
Planning Engineer.
Water Resources, Engineering and Water Supply Department
Adelaide
Australia

T. D. B. Pearce
Engineer,
PACTEC
North Adelaide
Australia

Abstract

In association with a study to give guidance on the domestic use of rainwater for South Australian households without a mains water supply and dependent upon rainwater as thesole source of supply, graphic results of tank size and roof area combinations, as depicted by iso-demand curves have been produced.

These iso-demand curves reflect: a more realistic approach in assessing the degree of security or reliability of supply, through the use of the counting rule for complete and partial 'successes'. In addition, a more conservative approach to the test for spill results in a larger storage capacity, equivalent to one extra month's demand.

Through sensitivity analysis, it is found that the results obtained in this study are consistant with the results of an alternative 'optimistic' approach adopted for households with both public mains supply and rainwater tank supply. For this catagory of households, t; a supply failure is expected to be of lesser consequence than for households which are dependent solely upon rainwater tanks,

PDF of full document available to members (12pp, 340kb)