GATE CE 2026 Set 1 — Question 53
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.NAT+2 / -0MediumSteady-State Well HydraulicsHydrographs & GroundwaterWater Resources Engineering
Water Resources Engineering → Hydrographs & Groundwater → Steady-State Well Hydraulics
Last updated
Question
A fully-penetrating well of diameter is provided in an unconfined aquifer. The height of the ground water table is from the bottom of the aquifer. After a long period of pumping at a rate of , the drawdown in the observation wells at and from the pumped well is and , respectively. The transmissibility (in ) of the aquifer is ______ (rounded off to one decimal place).
Correct answer
35 to 40
Solution
1.Identify the parameters for an unconfined aquifer:
- Pumping rate,
- Initial saturated thickness,
- Distance to observation well 1,
- Drawdown at , saturated thickness
- Distance to observation well 2,
- Drawdown at , saturated thickness
Rearranging to solve for hydraulic conductivity :
3.Calculate Transmissibility (T):
For an unconfined aquifer, transmissibility is often defined based on the initial saturated thickness :Rounding to one decimal place, we get .
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE CE question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Hydrographs & Groundwater
2026 Set 1 Q16Two reservoirs having different water levels are connected by two long parallel pipelines of same…2026 Set 1 Q17An irrigation canal is to be designed to deliver 10 cumec to meet the peak demand of 7500 hectare…2026 Set 2 Q19The Culturable Command Area (CCA) for a canal is 10000 hectares. The base period for a crop in the…2026 Set 2 Q20Following statements are made with respect to the mass curve of rainfall: (I) Slope at a point on…2026 Set 1 Q23Gradually Varied Flow (GVF) profiles in open channels given in Column 1 are to be matched with the…