The gauge pressure at a depth of 2 m below free surface of water is approximately

Gauge pressure at depth h below a free water surface: p = γ × h = ρ × g × h. For water, unit weight γ = 9.81 kN/m³. At h = 2 m: p = 9.81 × 2 = 19.62 kPa kPa. Gauge pressure is measured relative to atmospheric pressure and increases linearly with depth.

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