DARLING RIVERINE PLAINS BIOREGION Background Report

16/08/02 Darling Riverine Plains Bioregion Background Report
Land Profile
Land Systems Llanillo, Upper Darling (Moonie Jomara, Gingie (in the south only) Rugby
Geology
River only)
Quaternary alluvials Quaternary alluvials Quaternary alluvials, prior stream
Landform and Soils Low level floodplain, channels. Grey
clays
Vegetation Coolabah, eurah, river cooba and
lignum on wetter areas with river red
gum on larger channels. Occasional
bimble box and belah on higher areas.
Areas of high grassland.
High level floodplains, shallow
drainage lines. Grey clays
Coolabah open woodland with belah
and myall. Bimble box on higher
areas. Occasional whitewood, wilga
and leafless cherry.
deposits.
Low rises, minor dunes, raised
channels. Texture contrast soils and
sands. Minor grey clay.
Bimble box woodland with budda and
wilga. White cypress on coarser soils,
belah on finer soils. Coolabah on
enclosed channels, usually with belah.
Condition Heavily grazed, some cultivation Usually thinned, some cultivation Usually thinned, some clearing. Often
severe scalding
Reservation None None None
Key Areas 9, 10
Figure 3.4 Profile of the Warrambool-Moonie Province
(adapted from Morgan & Terrey 1992)
Land Profile
Land Systems Lightning Ridge Rotten Plain, Narran Upper Darling, Wombiera, Goodooga, Long
Meadow, Llanillo, Nigery, Rostella, Tatala.
Geology Fine and medium-grained Quaternary alluvials Quaternary alluvials
Cretaceous sediments
Landform and Soils Low rounded ridges with some
rocky hills. Red earths and lithosols
Vegetation Open woodland with silver leaf
ironbark. White cypress, western
bloodwood and mulga on coarser,
shallower soils and bimble box on
loamier soils and lower slopes.
Occasional rough-barked apple,
supplejack, warrior bush, kurrajong
and beefwood.
Condition Generally thinned and grazed.
Sheet and gully erosion widespread.
Frequent dense regrowth of cypress
and mulga.
co-dominant co-dominant co-dominant
co-dominant sub-dominant co-dominant
Extensive depressions and
backplains, minor lunettes,
salinas and levees. Grey clays
Grasses and forbs within
depressions with areas of lignum.
River red gum fringes in wetter
areas with river cooba, while
coolabah fringes seasonal
swamps with eurah.
Level to gently undulating floodplains, low
rises and low sand dunes. Grey clays,
texture contrast soils and sands
Coolabah, river red gum and occasional
black box fringing main channels with
scattered coolabah, myall, whitewood and
flowering lignum on floodplains. Bimble
box, wilga, budda, belah and occasional
leopardwood on low rises. Supplejack,
white cypress and wild lemon on dunes.
Largely cultivated Generally thinned and grazed. Higher areas
usually scalded. Coolabah regrowth dense in
some areas.
Reservation Kurrajong (9,000ha) None None
Key Areas 11, 12
Figure 3.5 Profile of the Narran-Lightning Ridge Province
(adapted from Morgan & Terrey 1992)
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