Information
Rainfall Simulator Extension Tour: ‘Forest Park’ Warwick
Level 1 General description
Purpose:
A rainfall simulator was used to examine the influence of different management options on infiltration of rainfall and runoff.
Methods (brief)
Soil present on site was a deep black clay, the soil was dry with some cracks present in the no-till bay; no cracks were apparent in the cultivated area.
The rainfall simulator was applied to the following four plots:
A) Cultivated/heavy stubble. The soil was cultivated with a shovel to create conditions similar to those left behind a scarifier. Straw cover was added to simulate a previous heavy wheat crop (cover 80%).
B) No-till/light stubble. The soil was not disturbed and some cracks were present (cover 15%).
C) No-till/scarified. The soil was previously not cultivated, but given a ‘cultivation’ with a shovel immediately prior to rainfall application (cover 0%).
D) Cultivation/bare. Similar to A but left with little cover (cover 10%).
Key findings (brief)
- Stubble cover and/or reduced tillage reduced runoff from intense rainfall (Figure 1).
- Nearly 50% of rainfall was lost as runoff when the soil surface was finely cultivated and had no stubble cover.
Location
‘Forest Park’ Warwick
Related studies
‘Orion Downs’ Orion; ‘Enderley’ - Gindie; ‘Kurrajong’ Capella; ‘Marylands’ Retro; ‘Innisfree’ Wolfgang; ‘Tarvellon’ Kilcummin; ‘Bundella’ Wallumbilla; ‘Twin-Butts’ Wandoan; ‘The Limes’ Chinchilla; ‘Moruya’ Goondiwindi
Key references and sources of this data synthesis
These data summaries have been extracted from:
- Cawley ST, Hamilton NA, Freebairn DM, Markey LJ. Viable Farming Systems Group Project: Evaluating fallow management options by using rainfall simulation. Queensland Department of Primary Industries October 1992.