GATE CE 2026 Set 2 — Question 19
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Water Resources Engineering → Irrigation Systems & Water Need → Base Period
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Question
The Culturable Command Area (CCA) for a canal is 10000 hectares. The base period for a crop in the CCA is 140 days. Watering depth for the crop is 40 cm. The outlet discharge (in ) lies between
Correct answer
(A) 3 and 4
Solution
Given:
The relationship between Duty, Base period, and Delta is given by the formula:Where is in hectares/cumec, is in days, and is in meters.Step 2: Calculate the outlet discharge ().
The discharge required is the ratio of the area to the duty:The calculated discharge of approximately 3.307 lies between 3 and 4. Thus, option (A) is correct.
- Culturable Command Area () = 10000 hectares
- Base period () = 140 days
- Watering depth (Delta, ) = 40 cm = 0.4 m
The relationship between Duty, Base period, and Delta is given by the formula:Where is in hectares/cumec, is in days, and is in meters.Step 2: Calculate the outlet discharge ().
The discharge required is the ratio of the area to the duty:The calculated discharge of approximately 3.307 lies between 3 and 4. Thus, option (A) is correct.
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