What is the significance of measuring invert elevation in sewer systems?

Measuring the invert elevation in sewer systems is crucial because it provides information about the lowest point inside a pipe or sewer structure, which directly impacts the calculation of flow rates. By knowing the invert elevation, engineers can understand the hydraulic grade line and how gravitational forces will influence the movement of wastewater through the system. This information is essential for designing effective sewer systems, ensuring they can adequately transport sewage without issues such as blockages or overflow. Understanding flow rates, in turn, can help in optimizing the capacity of the sewer system to handle varying volumes of wastewater under different conditions.