TMI Assessment and Climate Zones in Western Australia

Yuxia Hu, Peter Saraceni, Geoffrey Cocks, Michael Zhou

    Research output: Contribution to journalArticle

    3 Citations (Scopus)


    Thornthwaite Moisture Index (TMI) is commonly used in climate zone classifications when designing residential slabs
    and footings on foundation soils with potential surface movements due to moisture changes. However in the current
    design guidelines – AS2870-2011, there is no specific guidance for the large land area of Western Australia. This paper
    has collected climate data in 39 town specific locations for 25 years (1988 ~ 2012). The TMI values were calculated
    using the method by Thornthwaite (1948). A climate zone map of Western Australia was produced based on the
    average TMI values of each town specific locations. The new climate zone map provided better predictions on the depth
    of soil suction change due to moisture change in Lake King, Ravensthorpe and Jerramungup with field data available.
    Original languageEnglish
    Pages (from-to)79-89
    Number of pages11
    JournalAustralian Geomechanics Journal
    Issue number3
    Publication statusPublished - Sep 2016

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