GATE Soil and Water Conservation Engineering: Soil and Water Erosion – Previous Year Questions

13 GATE previous year questions on Soil and Water Erosion (Soil and Water Conservation Engineering, Agricultural Engineering) with answers and explanations, from every paper.

1. GATE 2021 AG Q18 (1 mark, Multiple choice) – Approximately, how does sediment delivery ratio SDR vary with drainage area A?
2. GATE 2021 AG Q42 (2 marks, Multiple choice) – Bench terraces are planned on10% land slope, vertical interval2.5 m, batter slope100%. Find working width(m) and cultivated-area loss(%).
3. GATE 2021 AG Q58 (2 marks, Numerical answer) – A windbreak is 15 m high and 200 m long. Threshold wind speed at 15 m height is 9.6 m/s;5-year design wind16 m/s, deviating20° from normal to the…
4. GATE 2022 AG Q30 (1 mark, Numerical answer) – In the USLE slope-length relation, the stated exponent is .5 (the source calls this the soil-loss ratio). Slope length from the divide is 600 m,…
5. GATE 2022 AG Q42 (2 marks, Multiple choice) – Design a parabolic grass waterway for 2.85 m³/s on3% slope. Permissible velocity1.78 m/s and Manning n=.04. Excluding freeboard, select top width and…
6. GATE 2024 AG Q18 (1 mark, Multiple choice) – Which process transports the largest portion of soil in typical wind erosion?
7. GATE 2024 AG Q19 (1 mark, Multiple choice) – Which bench terraces suit hilly regions with heavy rain where a major fraction must be safely drained as runoff?
8. GATE 2024 AG Q31 (1 mark, Numerical answer) – An area of 6% slope has its slope length halved with all other factors unchanged. Find the percentage reduction in annual soil loss, to two decimals.
9. GATE 2024 AG Q59 (2 marks, Numerical answer) – Contour bunds on a 3% slope in a semiarid region are spaced30 m horizontally. The10-year daily maximum effective rainfall is 20 cm. Find design…
10. GATE 2025 AG Q49 (2 marks, Numerical answer) – Windbreaks 2.7 m high protect a wheat field. Wind perpendicular to the barrier is 9 m/s at 15 m height; the minimum 15 m wind speed that moves the…
11. GATE 2026 AG Q22 (1 mark, Multiple choice) – In the wind-erosion relation used here, how does the transported soil amount vary?
12. GATE 2026 AG Q23 (1 mark, Multiple choice) – A chute spillway’s discharge-carrier bed changes from a steeper slope to a milder slope. Which transition is provided?
13. GATE 2026 AG Q62 (2 marks, Numerical answer) – Bench terraces are planned on a 15% hill slope. Vertical interval is 2.5 m, riser slope is 1H:1V, and cut equals fill. Find earthwork volume in…