CHA99 (Plot1)

Site: CHA99 (Plot 1)

Land Unit: Grampians Alluvial

General Land Unit Description:
This land unit consists of the alluvial plains around the Grampians. The soils are commonly poorly drained Grey Sodosols in association with Podosols. Some areas experience months of inundation. These soils are commonly Hydrosols. The vegetation is mainly thick scrubby tea tree on the wetter soils.

This site is near the base of the Grampians, and it appears that water drains onto the alluvial plains from the Grampians. Apparently groundwater closer to the Grampians (about 1 km to the east) is at a depth of 3 m. Currently there exists a 1.5 year old E. globulus plantation on ex-agricultural land.

Site Description:

Geology: Quaternary alluvial	Landform pattern: Plain
Position in landscape: Flat	Internal drainage: Poorly drained

Soil Profile Morphology

A1	0-30 cm	Dark grey (10YR4/1) loamy sand, single grain structure, loose consistence when moist, many medium roots. Gradual and smooth transition to:
A2	30-70 cm	Light grey (10YR7/2) sand, single grain structure, loose consistence when moist, few very fine roots. Gradual and smooth transition to:
Subsoil
Bh	70-115 cm	Very dark brown (10YR2/2) with few medium distinct pale brown (10YR6/3) mottles, loamy sand, single grain structure, very weak consistence when wet, few medium ferruginous nodules, common very fine macropores, areal porosity 0.4%, few very fine roots. Gradual and smooth transition to:
B2	115-130 cm	Very pale brown (10YR7/4) sand, single grain structure, loose consistence when wet, unable to estimate macroporosity, few very fine roots. Sharp and smooth transition to:
C	130-150 cm	Light grey (10YR7/1) with many coarse prominent yellow (10YR7/6) mottles, sandy clay, weak polyhedral structure (20-50 mm), firm consistence when moist, few very fine macropores, areal porosity 0.1%, no roots observed.
	150-400 cm	Sandy clay to 300 cm, then grey mottled clayey sand mixed with heavy clay and sand, coarse quartz fragments observed below 300 cm.

Notes: The Mudstone layer does not appear to offer a large water holding capacity.

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