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)