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Determinants of Small-Area Water Consumption for the City of Phoenix, Arizona

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  • Elizabeth Wentz
  • Patricia Gober

Abstract

Rapid population growth in the face of an uncertain climate future challenges the desert city of Phoenix, Arizona to consume water more prudently. To better understand the demand side of this important issue, we identified the determinants of water consumption for detached single-family residential units using ordinary least squares regression (OLS). We compared the results from the OLS model to those of a geographically weighted regression (GWR) model to determine whether there are spatial effects above and beyond the effects of the OLS variables. Determinants of residential water demand reflect both indoor and outdoor use and include household size, the presence of swimming pools, lot size, and the prevalence of landscaping that requires a moist environment. Results confirm the statistical significance of household size, the presence of a pool, landscaping practices, and lot size. Improvement of the GWR over the OLS model suggests that there are spatial effects above and beyond the effects for household size and pools – two of the four determinants of water demand. This means that census tracts exhibit water consumption behavior similar to neighboring tracts for these two variables. Model parameters can be used to investigate the effects of policies designed to regulate lot size, pool construction, and landscaping practices on water consumption and to forecast water demand in areas of new construction. Copyright Springer Science+Business Media, Inc. 2007

Suggested Citation

  • Elizabeth Wentz & Patricia Gober, 2007. "Determinants of Small-Area Water Consumption for the City of Phoenix, Arizona," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 21(11), pages 1849-1863, November.
    • Handle: RePEc:spr:waterr:v:21:y:2007:i:11:p:1849-1863
    DOI: 10.1007/s11269-006-9133-0
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    References listed on IDEAS

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    1. Patrick Troy & Darren Holloway, 2004. "The use of residential water consumption as an urban planning tool: a pilot study in Adelaide," Journal of Environmental Planning and Management, Taylor & Francis Journals, vol. 47(1), pages 97-114.
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