Synthetic permeable fabrics act as microscopic sieves designed to pond water rather than filter it rapidly. When sediment-laden water pools behind the geotextile wall, the reduced flow rate allows heavier soil particles to sink to the ground naturally. This process of gravitational settling prevents fine soil, clay, and organics from migrating into storm sewers. The fabric must balance water permittivity with filtration efficiency, ensuring excess water drains gradually without creating massive pressure points that cause wall failure. Correctly constructed silt fence installations ensure that construction zones maintain sediment control during intense weather events.
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