What is the primary function of a well screen?

The primary function of a well screen is to allow water to flow into the well while blocking larger particles. Well screens are designed to filter water from the surrounding aquifer while preventing the entry of sand, gravel, and other undesirable materials that could clog the well or damage the pumping equipment. The screen typically consists of a perforated or slotted material, which permits the flow of water while retaining larger solids, thus ensuring a clean and continuous water supply. This function is crucial for maintaining the well's efficiency and longevity, as it protects the system from sediment-related issues.

In contrast to this, filtering out sediments and preventing clogging from algae are more specific challenges that a well screen helps to address indirectly by performing its primary function. Increasing the water table does not pertain to the direct role of a well screen, as the water table is influenced by broader hydrological processes rather than the function of a screen itself.