Scour and fill in the Swift Creek (Ngarradj) catchment: Results of scour chains for the 1998/1999, 1999/2000 and 2000/2001 wet seasons

Environment Australia, 2001

Internal Report 388
Saynor MJ, Erskine WD, Smith BL, Fox GJ & Evans KG
Supervising Scientist Division

About the report

Initial field inspections were conducted in the Swift Creek (Ngarradj) catchment during the Dry season of 1998 (September) to identify reaches in which channel erosion rates could be measured as part of a sediment budget to determine the possible effects of the Jabiluka mine on sediment generation, storage and transport rates (Saynor 2000, Erskine et al 2001). Swift Creek is a sand-bed stream which, in some reaches, is highly sinuous. During the field observations, various fluvial erosion processes were identified (Erskine et al 2001) with one of these being scour and fill of the sandy creek beds. Bedforms such as dunes, sand sheets, point bars and scour holes were present at the time of the inspection, when the creeks were completely dry and indicated that scour and fill were active processes during the Wet season. To measure this scour and fill, scour chains were recommended for installation in the creeks (Saynor 2000, Erskine et al 2001).