Planet WGSW-24010 User Manual page 35

for UWWTD purposes or assessment of non-qualifying discharges) may provide a 'coarse' focus
for initial prioritisation of areas worthy of more attention, but should then be followed up by more
intensive surveys on a whole catchment or sub-catchment basis before recommendations are
made regarding nutrient reduction measures. However, the limitations on comparison between
catchments (2.4.3 and 6.2.3) must be taken into account when planning the surveys and
interpreting results.
To monitor compliance with water quality targets after installation of nutrient reduction
measures, MTR sites up- and downstream of the discharges in question should continue to be
monitored after the nutrient reduction measures are in place. Control sites further upstream and
perhaps also on physically similar rivers, should also be monitored to establish the baseline
variation. Any changes due to the nutrient reduction measures will be superimposed on this
natural variation.
R&D Technical Report E38 21