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

Section D: Policy and Planning

Paper D.1

Rainwater Catchment Rationing

Richard J. Heggen
Associate Professor
Department of Civil Engineering
University of New Mexico
NM 87131


In standard practice, rainwater catchment systems are designed to satisfy a fixed demand. An economic demand function relating consumption to price (the deterministic component of which is related to construction and maintenance costs, the stochastic component of which is related to the consequences of system failure) is not made explicit. Several studies have assumed some scheme of rationing in drought conditions, but little consideration has been given to a common basis for such analysis.

Practices of water rationing are surveyed. Several approaches applicable to small-scale catchment management are identified. A case study in northern New Mexico is evaluated with a one-parameter demand function. From the perspective of penalty minimization, the more successful rationing plan is Identified.

PDF of full document (12pp, 450kb)

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