Following discrete rainfall events, soil-water measurements showed that for each of the rainfall events, pronounced redistribution of rainfall from runoff (source) into runon (sink) zones occurred, redistribution increasing with the amount of rainfall. The amount of soil-water in the 0-300 mm layer followed the order: mulga grove> interception zone> runoff zone.
Impairment of surface hydrology had a significant effect on dry matter production by resident perennial grass populations. In the runoff zone, production by woollybutt (Eragrostis eriopoda) was significantly enhanced when incident rainfall was contained in situ. Conversely, dry matter production by mulga grass (Thyridolepis mitchelliana) in the lower interception zone was significantly depressed by barriers preventing access by overland flow.
September 24-27, 1996
Port Augusta, South Australia
ISSN 1323-6660
Full-text publications from the Australian Rangelands Society (ARS) Biennial Conference Proceedings (1997-), Rangeland Journal (ARS/CSIRO; 1976-), plus videos and other resources about the rangelands of Australia.