A WATER QUALITY ISSUES ANALYSIS FOR THE JOHNSTONE RIVER BASIN
Report No. 11/05
for Terrain NRM
Stephen Lewis and Jon Brodie
Australian Centre for Tropical Freshwater Research, James Cook University
Final report April 2011
Agrochemicals
Herbicides
... Diuron, atrazine, hexazinone and tebuthiuron residues were detected in ‘grab’ samples collected along a transect from the Johnstone River to Russell Island (Kapernick et al., 2006). While herbicide residues detected were at relatively low levels (~5 ng/L diuron; others at 1-2 ng/L) compared to guidelines and effect concentrations, this sampling was conducted 2 weeks after Tropical Cyclone Larry had crossed the coast and so concentrations may have been much higher in the earlier stages of the plume.
A WATER QUALITY ISSUES ANALYSIS FOR THE JOHNSTONE RIVER BASIN
Report No. 11/05
for Terrain NRM
Stephen Lewis and Jon Brodie
Australian Centre for Tropical Freshwater Research, James Cook University
Final report April 2011
Agrochemicals
Herbicides
… Diuron, atrazine, hexazinone and tebuthiuron residues were detected in ‘grab’ samples collected along a transect from the Johnstone River to Russell Island (Kapernick et al., 2006). While herbicide residues detected were at relatively low levels (~5 ng/L diuron; others at 1-2 ng/L) compared to guidelines and effect concentrations, this sampling was conducted 2 weeks after Tropical Cyclone Larry had crossed the coast and so concentrations may have been much higher in the earlier stages of the plume.