Well points are most effective in which type of soils?

Well points are most effective in course grain or sandy soils due to the larger void spaces between the soil particles. This characteristic allows for efficient water movement and drainage, making it easier for water to flow into the well point and be extracted. Sandy soils also have a higher permeability, which means they can transmit water more quickly than finer-grained soils.

In contrast, clay soils tend to have very small particles that create tight packing, resulting in low permeability. This would inhibit water flow and make well points less effective. Loamy soils, while being a mixture of sand, silt, and clay, can hold moisture effectively but may not allow for the same rapid water movement as sandy soils do. Silty soils have fine particles that can also compact and restrict water flow, making them less ideal for well points compared to course grain or sandy soils. Therefore, the properties of course grain or sandy soils align closely with the functioning of well points, facilitating better water extraction.