What is one of the design requirements for natural soil liners?

Hydraulic conductivity is a critical design requirement for natural soil liners because it determines how well the liner can impede the movement of leachate and groundwater. For a soil liner to be effective in controlling the migration of contaminants, it must have low hydraulic conductivity, which means it should not allow water to pass through easily. This helps in preventing potential environmental contamination by keeping leachate contained within the landfill site.

In designing landfill operations, ensuring that the natural soil liner has an appropriate hydraulic conductivity is essential for maintaining the integrity of the landfill and protecting surrounding natural resources. Other factors, while important in a broader context, do not directly impact the primary function of the soil liner in terms of contaminant containment.