Which factor can help determine the yield of a well?

The hydraulic conductivity of the aquifer is a critical factor in determining the yield of a well because it describes the ability of the geological material surrounding the well to transmit water. It essentially measures how easily water can flow through the aquifer material, which directly affects how much water the well can produce over a given period. Higher hydraulic conductivity means that water can flow more freely into the well, leading to a higher yield.

In addition to hydraulic conductivity, the diameter and depth of the well and the length of the pump do impact well performance, but they are not as decisive for yield as hydraulic conductivity. The well diameter mainly influences the flow rate and efficiency but not the aquifer's inherent ability to supply water. The depth of the well relates to the water table level and the distance water needs to be pumped, while the pump length affects how effectively water can be lifted, but again, these factors are secondary to hydraulic conductivity when considering the overall potential yield of the well.