Information

Grazing management implications on runoff and erosion processes in semi-arid Central Queensland (Keilambete) (Waters 2004) 

Level 1 General description

Purpose:

To determine the impacts of grazing management on hydrology and soil movement.

Methods (brief)

Hydrology and soil movement processes were examined under various pasture utilisation rates for cleared plots and in timbered paddocks for small catchments.

Key findings (brief)

Rainfall intensity, amount and ground cover predominantly effected event runoff, while soil movement was most influenced by ground cover. Suspended sediment made up 50% of total soil movement.

Table 1: Summary of Average Annual Runoff and Soil Erosion for Keilambete grazing trial. Howleaky simulation results presented for trial period and long term annual average (based on analysis by D Waters 2009).

Management System

Observed

 

 

 

EMC gm/L

Normalised Soil loss (t/ha)

Normalised EMC (gm/L)

Predicted

Predicted

(1995-1999)

(1900-2000)

 

Cover

LS1

Runoff

Soil loss

Runoff

Soil loss

Runoff

Soil loss

 

(%)

 

(mm)

(t/ha)

(mm)

(t/ha)

(mm)

(t/ha)

High utilisation

55

0.37

171

5

2.9

13.5

7.8

171

6

155

4

Medium utilisation

64

0.37

81

2

2.5

5.4

6.8

80

2

75

1

Exclosure

84

0.37

42

0.5

1.2

1.3

3.2

42

0.2

58

0.3

“A” class management

 

 

 

 

 

 

 

 

 

113

0.85

“B” class management

 

 

 

 

 

 

 

 

 

136

2.6

“C” class management

 

 

 

 

 

 

 

 

 

150

5.1

“D” class management

 

 

 

 

 

 

 

 

 

170

10.5

Location

Kielambete, Central Queensland. Lat S23 22 30.0, Long E147 35 15.0

Related studies

Grazing management Implications on runoff and erosion processes in semi-arid central Queensland (Glentulloch) (Water 2004)

Run-off and soil movement on mid-slopes in North-Eastern Queensland grazing woodlands. (Scanlan et al., 1996)

 

Level 2, level 3, level 4 and level 5