What can reduce the water yield of a well?

The reduction of water yield in a well can indeed be attributed to screen incrustation. This phenomenon occurs when minerals and other deposits accumulate on the screens or filters of a well, which are designed to allow water to flow in while keeping out sand and other particulates. Over time, these deposits can block the flow of water, thereby decreasing the overall yield or flow rate of the well.

Screen incrustation may result from various factors, including the chemical composition of the groundwater, biological growth, or sedimentation. Once the screens are sufficiently clogged, it can lead to significant challenges in accessing the water supply and may require costly maintenance or rehabilitation processes to restore the flow capacity of the well.

The other options, such as proper maintenance, quality drilling equipment, and optimized construction practices, are elements that contribute to the productivity and efficiency of a well but do not directly lead to a reduction in water yield when managed appropriately.