Research Article

Application of an Ensemble Statistical Approach in Spatial Predictions of Bushfire Probability and Risk Mapping

Table 3

Description of soil units of the study area (based on Queensland soils and land systems) (source: http://researchbank.rmit.edu.au/).

Soil IDDetailedGeneral

Fu3Steep hilly to mountainous terrain on metasediments and phyllites rising to 2800 ft above sea level: dominant soils on the slopes are shallow and stony leached loams (Um2.1), as well as (Um5.2) loams.Shallow and stony leached loams

Tb64Rolling to hilly terrain with gentle to moderate slopes: dominant soils are hard, acidic, and yellow (Dy3.41) and red (Dr3.41) mottled soils. Associated are hard alkaline yellow (Dy3.43) and red (Dr3.43) mottled soils; sandy acidic yellow mottled soils (Dy5.41), (Dy5.31), and (Dy5.81) and leached sands (Uc2.2), all containing large amounts of nodular ironstone material, also with mottled clays, at depth below the (Uc2) soils.Sandy and silty clay

Mp6Low coastal basaltic plateaux and islands of Moreton Bay (about 50 ft above sea level): dominant soils are red friable earths (Gn3. 11) on the gently undulating to flat ridge tops with (Gn3. 14) soils on the beveled slopes of the ridgesMixed grouping consisting of sand and clay

NY3Coastal plains, lower and middle reaches of river flood-plains, swamps, estuarine areas, and tidal marshes, generally low-lying poorly drained areas subject to flooding: dominant soils seem to be sandy-surfaced soils, friable acidic grey soils (Dg4.11), (Dg4.41), and (Dg4.81); friable acidic yellow mottled soils (Dy5.11); and acidic grey friable earths (Gn3.91). Associated soils are (Dg2.41), (Dd3.11), and (Db4.11).Sandy soil

Tb65Gently rolling areas of the subcoastal lowlands (less than 400 ft above sea level) with a maximum relief of 50 ft between crests and valleys. The soil pattern is complex and controlled by the lithology of the parent rock material. Dominant soils are deep-surfaced loamy duplex (Dy3.41), (Dy3.42), (Dr3.41), and (Dr2.12) on sandstones.Deep-surfaced loamy duplex

Mm2Undulating landscape with linear gilgais on some slopes: crests and upper ridge slopes of cracking red-brown clays (Ug5.37) or loamy soils with red clay subsoils (Dr2.33), passing down the slope to cracking brown clays (Ug5.32) on gilgai puffs and cracking grey clays (Ug5.23) in gilgai depressions.Clay and loamy soil

MM9Terraced valley plains: dominant soils are brown and grey cracking clays (Ug5.34), (Ug5.39), and (Ug5.2) which occur on the third terrace with (Gn3.21), (Dy3.41), and (Dy3.13) soils.Sandstones and shales

Fu2Hilly to steep hilly areas of metasediments and phyllites, traversed by narrow valley plains along the streams: dominant soils are shallow and stony leached loams (Um2.12) and also (Um5.2) loams.Shallow stony loams

Cd3Steep hilly to mountainous land: dominant soils seem to be leached sands (Uc2.12) and siliceous sands (Uc1.21 and Uc1.22) on sandstones; grey cracking clays (Ug5.23) on shales; and shallow red clays (Uf6.12) on basalt.Sandy and clay soils

Sj12Lower to middle reaches of stream flood-plains: dominant soils are hard, acidic yellow and yellow mottled soils (Dy2.41) and (Dy3.41) with (Dd1.41) on the flat areas, together with leached sands (Uc2.33 and Uc2.32) on low broad sandy banks. Other soils include (Gn3.01) and (Uf6).Leached sands

Mw30Gently undulating area of tertiary sediments and igneous rocks: dominant soils are clay loam to light clay texture.Clay loam to light clay texture

Kb28Low hilly terrain on basalts and sedimentary rocks: dominant soils are moderate and shallow forms of dark cracking clays (Ug5.14, Ug5.12, and Ug5.13) on the slopes.Dark cracking clays

Pl1Hilly country of sandstones and intruded intermediate and basic rocks, rising to 800 ft above sea level: dominant soils on the moderate to steep slopes are hard acidic red and yellow soils (Dr3.41), (Dr2.41), and (Dy3.41) with some areas of (Dy3.43) and (Dr3.43) soils.Light sandy loam

Tb62Undulating to hilly valley slopes flanking creek and river flood-plains: dominant soils on the gentle to moderately steep slopes are hard acidic yellow mottled soils (Dy3.41), (Dy3.21), and (Dy3.61).Hard-setting loamy soils with mottled yellow clayey subsoils

Kb12Gently rolling areas of the subcoastal lowland (less than 400 ft above sea level) on altered basic rocks; maximum relief is 50 ft between crests and valleys: dominant soils are shallow dark cracking clays (Ug5.12) with hard neutral red and yellow soils (Dr2.12) and (Dy2.12).Shallow dark cracking clays

LL6Mountainous: steep slopes of loamy soils with an A2 horizon (Um4.2), yellow-brown earths, (Gn2.44), and rock outcrops.Loamy soils

Rh9Steep hilly to mountainous: dominant soils seem to be dark-brown friable loam surface soil underlain by light-red to brownish-red heavy but friable clayDark-brown friable loam surface

Me8Low hilly area of tertiary sediments and igneous rocks: dominant soils are brown (Gn3.22) and dark (Gn3.42) friable earths and shallow dark cracking clays (Ug5.12) on the deeply altered igneous rocks.Sediments and clay

Kd6Valley plains: dominant soils are dark, cracking clays (Ug5.15 and Ug5.16). Associated are areas of other soils, including (Dd1 .41) and (Dy2.41) on broad terraces.Dark, cracking clays

Mg26Plateaux and plateau remnants in mountainous country at moderate to high elevation (>1000 ft): loamy soils, rolling hills of red friable porous earths (Gn4.11), and/or brown friable porous earths (Gn4.31).Crusty loamy soils