What might happen if sewer lines have insufficient scouring velocity?

Insufficient scouring velocity in sewer lines can lead to clogging and various odor issues. Scouring velocity refers to the minimum flow speed necessary to keep solids and debris suspended and avoid settling within the pipes. If this velocity is not achieved, wastewater cannot effectively carry away accumulated waste, leading to blockages from sediment or grease buildup.

As these solids collect, they can create narrow passages in the pipes, leading to reduced flow and potential backups. Moreover, stagnant areas in the sewer system become breeding grounds for bacteria that produce foul odors. Thus, regular flow that is below the necessary scouring velocity results in waste accumulation and odors penetrating the system, ultimately impacting both functionality and public health.