How can heavy rainfall impact a sewer system?

Heavy rainfall can significantly impact a sewer system by leading to increased flow within the system. When rain falls, it can rapidly overwhelm a sewer system's capacity as both stormwater and wastewater enter the pipes. The volume of water from heavy rains can exceed the system's design limits, causing the sewer to transport not only wastewater but also excess stormwater runoff. This increased flow can lead to potential overflows, flooding, or even backups in the sewer system, which can result in environmental contamination and public health risks.

Understanding this relationship between rainfall and sewer flow is crucial for effective sewer management and planning, particularly in mitigating risks during heavy precipitation events. Recognizing the need for adequate drainage and overflow management systems becomes increasingly important in areas prone to heavy rainfall.