Answer
Groundwater movement is influenced by two main factors: hydraulic gradient and hydraulic conductivity. The hydraulic gradient represents the change in hydraulic head (water level) over a given distance. Groundwater naturally flows from areas of higher hydraulic head to areas of lower hydraulic head, following the direction of the hydraulic gradient. The steeper the gradient, the faster the groundwater flow. Hydraulic conductivity, on the other hand, is a measure of how easily water can move through the subsurface materials.
It depends on the permeability and porosity of the rock or sediment. Materials with high hydraulic conductivity allow water to flow more easily, while those with low hydraulic conductivity impede groundwater movement. Together, the hydraulic gradient and hydraulic conductivity determine the rate and direction of groundwater flow in an aquifer.
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