Flor, D; Bell, S; Zimmermann, N; (2018) Key variables and policy test to increase water efficiency in households in London: A system dynamics approach. In: Proceedings of the XVI Latin American Congress of Systems Dynamics. : Puebla, Mexico. (In press).

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Abstract

Water efficiency is a complex system influenced by different variables. This study focuses in identifying key variables and causal mechanisms to then evaluate policy options to increase water efficiency in households in London. The methodology consists of two phases. Phase one develops a review of previous studies and a focus group session to conceptualize the problem and relationships between variables. Phase two constructs, validates and analyses a system dynamics model, and then proposes policies. Results show promise for reducing water consumption through efficient appliances. However, efforts must be placed in their development. Moreover, installation of metering devices can reduce water consumption, but this effect weakens over time. Occupancy continues to be a major factor influencing water consumption. Because of the study’s focus on causal feedback mechanisms, it can explain which policies work and why at other times even by improving balancing feedback loops, the model stabilizes with no further reduction.

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