What is a potential issue when using a staff gauge in turbulent waters?

When using a staff gauge in turbulent waters, one of the main challenges is that foam can obscure visibility, making the gauge difficult to read. In fast-moving water, especially where turbulence is present, foam generated by the agitation of water can cover the staff gauge markings. This interference can lead to confusion and difficulty in accurately determining water levels, which is crucial for effective monitoring and management of wastewater systems.

While buoyancy, measurement accuracy, and safety hazards are important considerations in various contexts, they do not specifically relate to the immediate issue faced with a staff gauge in turbulent waters. Foam can cause real-time reading difficulties that directly impact the reliability of the observations necessary for operations and compliance in wastewater management.