Why does the water of a pond percolate through the soil making the pond dry?

Water percolates through soil due to gravity pulling it downward and the porous nature of soil allowing water to flow. If the soil is dry or if there is high demand for water from plants or evaporation, the water will continue to percolate through until the soil is no longer saturated. This can lead to ponds drying up if the rate of percolation exceeds the rate of water entering the pond.