THE BIOLOGICAL SURVEY OF THE EASTERN GOLDFIELDS OF WESTERN AUSTRALIA: Physical Environment

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Introduction: The Norseman-Balladonia Study Area has hot, dry summers and cool winters. Rain falls during both winter and summer (Figure 3). A bioclimatic map of the region has been compiled by Beard (1975) based on the system of Bagnouls & Gaussen (1957). The Study Area contains three different climatic types varying from Dry Warm Mediterranean in the south-west to Desert (non-seasonal) in the north-east. The climate over most of the Study Area has been classified as semi-desert (Mediterranean). Average monthly reeordings of rainfall and temperature and the long-term mean are presented in Figure 3. Climatic data are summarised from Norseman, Balladonia and Salmon Gums.