Shire of Perenjori
|Area||~8,313 square kilometres, located ~360 km north of Perth.|
|Towns||Bunjil, Latham, Maya and Perenjori.|
|Average Temperature||Mean daily maximum temperature over 30 years 1990 – 2019
37.4°C (Jan) and 18.7°C (Jul).
|Annual Rainfall||Average annual rainfall over 30 years 1990 – 2019 250 mm (BoM 2020).|
|ABS Profile||Perenjori ABS profile|
|Shire website||Shire of Perenjori|
Around 615 people live in the Shire of Perenjori, 98% of whom live in the small towns dotted throughout the Shire (ABS 2016). The largest town is Perenjori, with a population of 276.
The population in the Shire of Perenjori decreased by 34% between the last census in 2011 and the most recent census in 2016, and is projected to decrease by a further 28% by 2031 (DPLH 2016).
Approximately 12% of residents of the Shire of Perenjori were born overseas and approximately 6% are of Aboriginal and / or Torres Strait Islander descent.
Estimates of the resident populations as at 30 June are released annually for Local Government Areas (LGAs) in Australia by the Australian Bureau of Statistics. The estimates are generally revised 12 months later and final estimates are available after the following census. Visit the ABS website for further details.
The economy of the Shire of Perenjori depends primarily on broad acre agriculture and the services that support farming in the area. Local farming includes the production of cereal crops (wheat, canola, lupins, oats) and livestock (primarily sheep for wool). Mining at Karrara and Mt Gibson Extension Hill is an important part of the local economy (MWDC 2013), employing as many people as agriculture, and wildflower tourism is a small but growing area.
The main land uses in the Shire of Perenjori includes are agriculture, mining and nature conservation.
West Perenjori Nature Reserve
The West Perenjori Nature Reserve covers ~460 ha and is located south west of Perenjori. The reserve forms part of the Yamatji conservation reserve.
Weelhamby Lake Nature Reserve
The Weelhamby Lake Nature Reserve covers ~606 ha of inland salt lake habitat located north of Perenjori. The reserve forms part of the Yamatji conservation estate.
Maya Nature Reserve
The Maya Nature Reserve covers ~ 54 ha and is located near Latham. The reserve forms part of the Yamatji conservation estate.
Latham and East Latham Nature Reserve
The Latham Nature Reserve covers ~107 ha and the nearby East Latham Nature Reserve covers ~162 ha. Both reserves are located near Latham and both form part of the Yamatji conservation estate.
Charles Darwin Nature Reserve
The Charles Darwin Nature Reserve is a private reserve owned and managed by Bush Heritage Australia with Badimaya Traditional Owners. The reserve was established in 2003 and covers ~68 600 ha. it provides habitat for 230 animals, including Vulnerable Malleefowl Leipoa ocellata and Endangered Shield-backed Trapdoor Spider Idiosoma nigrum, and over 680 plants, including 27 priority listed species.
Caron Nature Reserve
The Caron Nature Reserves covers ~392 ha and is located south of Perenjori. The reserve was initially established as a water reserve.
Bowgarder Nature Reserve
The Bowgarder Nature Reserve covers ~1 550 ha. The reserve is located near Perenjori and is part of the Yamatji conservation estate.
Underlying the Shire of Perenjori is south west terrain which forms a part of the Yilgarn Craton. The area comprises of biotite granite and gneiss rocks formed from igneous and metamorphic rocks. Underlying the northern portion of the shire (bordering the Shire of Morawa) is the Youanmi terrrain which forms a part of the Yilgarn craton. The area comprises of rocks rich in magnesium and iron along with layered sills of gabbro and dolerite. The north east portion of shire is under lined by the Youanmi Terrain which forms part of the Yilgarn Craton. The area comprises of iron and magnesium rich rocks, layered sills of gabbro and dolerite and banded iron formations.
The soils underlying the shire consists of deep sandy and loamy earth soils. Saline soils occurring within a shallow water table are commonly associated with the narrow drainage lines and salt lakes in the shire. The remainder of the shire is typically characterised by undulating plains of sand dunes and areas of broad ridge crest with emergent breakaways and open depressions.
Please go to the below link for more information on soil and geology in the region
Priority Fauna Species
The Tallering sub-IBRA forms part of the Yalgoo IBRA. The Yalgoo IBRA is dominated by red sandy plain of low woodlands to open woodlands of Eucalyptus, Acacias and Callitris (Desmond and Chant, 2001d).
Ancient Drainage subregion (Avon Wheatbelt 1)
The Ancient Drainage subregion occurs in the eastern LGAs of the NAR. This subregion is characterised by Proteaceous scrub occupies much of the lateritic hills and outcrops. The alluvial plains associated with the drainage lines is dominated by eucalypts, Casuarinas, York Gum and Jam wattle woodlands (Beecham, 2001a).
Threatened Ecological Communities
Priority Ecological Communities
Minjar and Chulaar Hills vegetation complex (banded ironstone formation)
Category (WA) – Priority 1
For more information visit the DPaW website.
Blue Hills (Mount Karara/Mungada Ridge/Blue Hills) vegetation complexes (banded ironstone formation)
Category (WA) – Priority 1
For more information visit the DPaW website.
Gascoyne Groundwater Area
The Gascoyne Groundwater Area extends north to Kalbarri and bounds the Arrowsmith Groundwater Area east to pastoral country. The largest groundwater aquifer occurs in the Yarragadee Formation, which has an estimated yield of 22.5 million m³/year (NACC, 2005). Groundwater from fractured rock aquifers in the eastern, inland part of the region is predominantly saline and poor yielding. This region of the Gascoyne Groundwater Area falls under the Carnarvon Artesian Basin Allocation Plan.
Yarra Yarra and Monger Lakes
Drainage Basin Length (km) Catchment Area (km2) Average Stream Salinity (mg/L) Key Characteristics Yarra-Yarra and Moore-Hill 350 17,700 >35,000 Yarra Yarra Lake is the terminal point for an extensive chain of salt lakes. The major lakes in the system include Nullewa Lake, Weelhamby Lake, Mongers Lake, Lake Goorly, Lake DeCourey and Lake Hillman.Approximately 42 % of the Yarra Yarra Drainage Basin is in the NAR. Due to the basin’s ﬂat terrain, drainage is generally uncoordinated, with each lake having its own internal drainage system. However, in wet years the lakes overﬂow along a broad drainage line, ending up in Yarra Yarra Lake. It is uncertain if there is a surface or groundwater connection between Yarra Yarra Lake and the Coonderoo River, a tributary of the Moore River.
Drainage Basin Length (km) Catchment Area (km2) Average Stream Salinity (mg/L) Key Characteristics Moore-Hill 288 13,450 3000-35000 The Moore River’s eastern reaches (Moore River East) which originates near Dalwallinu, and northern reaches (Moore River North) commences east of Coorow. The major tributaries are the Coonderoo River and Gingin Brook. The Moore River enters the ocean at Guilderton and the estuary is only open to the ocean for a few weeks each year.