</span></p><p style="margin: 0.0521in 0 0 0;"><span style="color: #010100;">The concentration-type source is best used for nodes that represent source water supplies or treatment works (e.g., reservoirs or nodes assigned a negative demand). The booster-type source is best used to model direct injection of a tracer or additional disinfectant into the network or to model a contaminant intrusion.</span></p>

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