GATE Irrigation and Drainage Engineering: Groundwater Hydrology – Previous Year Questions

9 GATE previous year questions on Groundwater Hydrology (Irrigation and Drainage Engineering, Agricultural Engineering) with answers and explanations, from every paper.

GATE 2021 AG Q30 (1 mark, Numerical answer) – A 300 mm well penetrates25 m below the static water table and pumps5400 L/min for 24 h. Observation drawdowns are1.11 m at 30 m and .53 m at 90 m.…
GATE 2021 AG Q60 (2 marks, Numerical answer) – Fully penetrating wells1.4 km apart in a homogeneous confined aquifer differ4 m in piezometric head. Flow is steady and unidirectional, K=3.5 m/day,…
GATE 2022 AG Q27 (1 mark, Numerical answer) – A fully penetrating 300 mm diameter well pumps 1200 m³/day from a confined aquifer with transmissivity 1000 m²/day. Radius of influence is 400 m. Find…
GATE 2023 AG Q62 (2 marks, Numerical answer) – A .30 m diameter well fully penetrates an unconfined aquifer initially 40 m saturated. After eight hours pumping.03 m³/s, observation drawdowns are3 m…
GATE 2024 AG Q58 (2 marks, Numerical answer) – A 15 cm diameter tubewell has initial groundwater depth 40 m above screen bottom, K=20 m/day, influence radius980 m and maximum drawdown12 m. A second…
GATE 2025 AG Q16 (1 mark, Multiple choice) – Which method is used for geophysical exploration of groundwater?
GATE 2025 AG Q31 (1 mark, Numerical answer) – An unconfined aquifer with hydraulic conductivity 12 m/day covers 1 ha. Pumping releases 6000 m³ and lowers its water table from 3 m to 7 m below…
GATE 2025 AG Q39 (2 marks, Multiple choice) – Steady flow in a confined aquifer occurs when
GATE 2026 AG Q61 (2 marks, Numerical answer) – A well fully penetrates a 30 m thick confined aquifer and pumps steadily at .06\,m3/s. Drawdowns are 3.6 m and 2.0 m at radii 60 m and 120 m. If…