Cross section and scour chain data in the Ngarradj catchment for 2002 and 2003

Department of the Environment and Heritage, 2004

Internal Report 481
Lowry JBC, Moliere DR, Boggs GS & Evans KG
Supervising Scientist Division

About the report

This report contains the data for cross sections and scour chains for 2002 and 2003. The data for the annual cross sections surveys in the Ngarradj catchment between 1998 and 2001 are presented in Saynor et al (2002a) and the data for the scour and fill determined by scour chains between 1998 and 2001 are presented in Saynor et al (2002b).

Initial field inspections were conducted in the Ngarradj catchment during the dry season of 1998 as initial work on the Jabiluka mine had commenced. Erskine et al (2001) proposed that a sediment budget framework should be adopted by eriss to assess the physical impacts, if any, of the Jabiluka mine on the Ngarradj catchment. During these field observations, various fluvial erosion processes were identified (Erskine et al 2001) with two of these being bank erosion and scour and fill of the sandy creek beds. To measure the amount of large-scale bank erosion permanently marked channel cross sections on the mine site tributaries (Tributaries North and Central) and at the three eriss gauging stations (Moliere et al 2002) were installed. Scour chains were used at some of the above cross sections to measure scour and fill (Saynor 2000, Erskine et al 2001, Saynor et al 2002b). Saynor et al (2001) outline the complete eriss field program in the Ngarradj catchment to assess the physical impacts of the Jabiluka mine.