Fig. 11From: Calibrating and validating a combined accumulation and mobilisation model for water distribution system discolouration using particle swarm optimisationShear stress and measured downstream turbidity dataset from the DI part of trunk main TM-WB. The days on which flow trials 1 to 6 (see Table 2) were conducted are shown as dashed lines with continuous turbidity data available from March 2012. Note y-axis is up to 60 NTU as a valve issue at the monitoring reservoir during trial 3 resulted in a short duration but extreme 50 NTU turbidity spikeBack to article page