Pinch points are areas that are particularly responsive to rainfall and over burdening. The heavier the rain, the greater the flow the sewer has to carry. It is inevitable in heavy rainfall or equivalent weather events that some of these sewers will be overwhelmed. The overloading, if not relieved by Combined Sewer Overflows (CSOs), would lead to storm sewage flooding homes, gardens, streets, highways and open spaces.
Monitoring pinch points as well as CSOs leads to a better understanding of the waste water network. This can also provide an early warning system which allows problems to be highlighted before the event results in a spill.
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