Should underdrains collect filtered water uniformly and with low head loss?

Underdrains are designed to function as a key component in various water treatment systems, particularly in filtration processes. Their primary role is to collect water that has been filtered through a medium, allowing for an efficient drainage system that minimizes obstruction and energy loss.

Collecting filtered water uniformly is crucial because it ensures that all areas of the filtration medium contribute equally to the flow and quality of the treated water. This uniform collection helps maintain consistent hydraulic conditions, which is vital for effective treatment processes. Additionally, low head loss is a desirable characteristic of underdrains, as it indicates a well-designed system that allows water to flow freely without excessive resistance. High head loss would suggest that the underdrains are either poorly designed or clogged, leading to inefficiencies in the system.

In summary, for optimal performance, underdrains should indeed collect filtered water uniformly and with low head loss, allowing for an efficient and effective treatment process in surface water applications.