Information
A framework relating soil surface condition to infiltration and sediment and nutrient mobilisation in grazing rangelands of North-eastern Queensland, Australia – Site 3 Simpson’s Dam
Level 1: General Description
Purpose
This study aims to provide evidence that grazing induces variations in soil surface condition affected infiltration and runoff composition. The objective of the study is to develop a framework relating to ground cover and soil surface condition from the impacts of grazing.
Method
Six sites underwent a series of rainfall simulations to determine infiltration and runoff properties. Key surface soil features were recorded and soil cores were taken to determine the infiltration, moisture and compaction.
Key Findings
- In general an increase in infiltration rate and a decrease in sediment concentration with an increase in ground cover was noted;
- Greatest variations in infiltration were noted for covers <25% ground cover, while the greatest variation in sediment loss was noted for covers >75%; and
- Total N and P losses did not correlate well with cover. However, concentrations of N and P were primarily influenced by sediment concentrations.
Location
The selected sites are located within the Burdekin River Catchment west of Townsville.
Site 3- Simpson's Dam
Longitude and Latitude:
S19o27'22.47''
E146o13'41.87''
Related Studies
The same investigation was carried out at:
- Meadowvale;
- High Range;
- Pinnacle Transect; and
- Thangala.
Keywords
Infiltration, Grazing, Soil Surface Conditions, Savannah