27°S 145°E Lantana – Queensland by Degrees

AT THE POINT

go1

Degree confluence 27°S 145°E, Google Earth

site

n

Looking north

e

Looking east

s

Looking south

w

Looking west

 

Location: Degree Confluence 27S 145E is located in south-west Queensland, on the property ‘Lantana' after which the degree square is named.  The closest settlement is Cheepie, approximately 42 km to the north.  While the confluence itself is unmarked, a GPS was used to find the exact location (accurate to within a few metres).  Access to within 2.5 km of the point is via property tracks.  The site was visited in the mid morning by a party of RGSQ members travelling in 4WD vehicles from Brisbane in November 2009.

gps

GPS reading for point

 

Landscape: Elevation at the degree confluence is 235 m, and the view shows a flat, vegetated terrain.  No human features are present at the site, although there is property infrastructure (including fences and roads) nearby.  Surface material is red, sandy soil, and in all directions there are sparse mulga trees with low scrub and the occasional gum tree.  There was no evidence of fauna at the confluence, but some cattle and sheep of the property were seen in the area.

cowely

Cowley Station

rain

Much needed rain runoff

storm

After a brief storm

rain2

Slowly filling up

 

The main geological feature at the confluence is red sand of Cainozoic Quaternary origin (less than 2.5 million years ago).  The area immediately surrounding the confluence is devoid of creeks although there several dams nearby, and a drainage gully is less than 3 km distant, which that and other creeks nearby drains into a lower-lying area to the south-west of the point; area especially subject to indundation after rains.

Point Photos By: Paul Feeney

Point Information By: Paul Feeney, Jo Grant

IN THE DEGREE SQUARE

loc

Climate: The closest representative weather station is at Quilpie Airport, which is located 85 km to the north-west of the confluence, and has an elevation of 200 m. The station has been collecting data since 1917.

 

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Year

Mean max
(ºC)

36.9

35.6

33.5

29.2

24.0

20.4

20.1

22.5

27.0

31.0

34.0

36.4

29.2

Mean min
(ºC)

27.3

23.3

20.6

15.7

11.0

7.4

6.0

7.7

11.7

16.2

19.6

22.2

15.4

Mean rain
(mm)

53.2

49.3

38.9

25.5

27.2

20.0

16.0

12.9

13.7

21.2

29.9

33.8

341.1

The highest temperature ever recorded in Quilpie was 46.5°C in January 1973 while the lowest temperature was -2.3°C in July 1977. The highest total of 919.3 mm was recorded in 1950 and the lowest total of 91.4 mm in 1937. These and other climate statistics for Quilpie can be found on the Australian Bureau of Meteorology website at, http://www.bom.gov.au/climate/averages/tables/cw_045015_All.shtml.

Extremes of Nature: The area is subject to the impact of some cyclones. The database maintained by the Bureau of Meteorology shows that since 1906 only 4 cyclones have tracked within 200 km of the confluence, none of which have passed within 50 km. These cyclones bring with them potentially destructive winds and intense rainfall. Cyclone information for this area and all of Australia can be found at the Australian Bureau of Meteorology website, http://www.bom.gov.au/cgi-bin/silo/cyclones.cgi.

cyc

Cyclone tracks within 200 km of point 1906 to 2006 (Bureau of Meteorology web site)

Extreme heat is also a significant issues. Records show that Windorah experiences 98 days annually with temperatures over 35°C, 20 of which typically reach 40°C or warmer. Such extreme temperatures can cause heat stroke and death if appropriate measures are not taken such as avoiding strenuous physical effort, keeping as cool as possible and drinking lots of water. Heat waves kill more people in Australia than all other natural hazards combined.

Today: The total population of the degree square at the 2011 national census was less than 50. The steady decline in population over the past decade is probably accounted for by the decline in the pastoral industries because of drought.

MEASURE

1996

2001

2006

2011

Total population

78

69

51

<50?

Total males

52

40

25

?

Total females

26

29

26

?

Under 5 years

3

9

4

?

65 years and over

3

0

7

?

Indigenous

6

3

0

?

Edited by: Hayley Freemantle

References

Geoscience Australia, NATMAP Raster

Geoscience Australia, Scanned 250 K Geology Maps

Google Earth