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What is a Tubewell Irrigation?
Grade Level:
Class 6
Law, Civic Literacy, Economics, FinTech, Geopolitics, Personal Finance, Indian Governance
Definition
What is it?
Tubewell irrigation is a method of watering fields where water is drawn from underground using a long pipe (tubewell) and a pump. This pump brings groundwater up to the surface, which is then used to irrigate crops. It's like drinking water from a straw, but on a much bigger scale for farms.
Simple Example
Quick Example
Imagine a farmer in Punjab needs to water his wheat field. Instead of waiting for rain, he uses a tubewell. A motor connected to the tubewell pulls water from deep inside the earth, and this water then flows through channels to reach every part of his field, just like water fills a bucket from a tap.
Worked Example
Step-by-Step
Let's see how a farmer decides if a tubewell is working well for his 5-acre field.
Step 1: The farmer checks his tubewell pump. He notes it can pump 100 liters of water per minute.
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Step 2: He knows his field needs about 50,000 liters of water per acre for one irrigation cycle. So for 5 acres, he needs 5 x 50,000 = 250,000 liters.
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Step 3: He calculates how long it will take to pump this much water. Total water needed / Water pumped per minute = 250,000 liters / 100 liters/minute = 2500 minutes.
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Step 4: He converts minutes to hours: 2500 minutes / 60 minutes/hour = 41.67 hours.
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Step 5: He checks his electricity bill. If the pump runs for 41.67 hours, and it uses 5 units of electricity per hour, total units used = 41.67 x 5 = 208.35 units.
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Step 6: If electricity costs Rs. 7 per unit, the cost for one irrigation cycle is 208.35 units x Rs. 7/unit = Rs. 1458.45.
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Answer: The tubewell can irrigate the 5-acre field in about 42 hours at a cost of approximately Rs. 1458 per cycle.
Why It Matters
Understanding tubewell irrigation helps us see how farmers ensure food security for our country, connecting to Economics and Governance. Engineers design these systems, and understanding water availability is crucial for environmental policies, linking to careers in agriculture, environmental science, and public administration.
Common Mistakes
MISTAKE: Thinking tubewells only use rainwater. | CORRECTION: Tubewells draw water from underground sources (groundwater), which is different from rainwater collected on the surface.
MISTAKE: Believing tubewells are always good for the environment. | CORRECTION: While useful, excessive use of tubewells can lower the groundwater level, which is bad for the environment and future water supply.
MISTAKE: Confusing tubewell irrigation with canal irrigation. | CORRECTION: Tubewell irrigation uses groundwater pumped from beneath the earth, while canal irrigation uses surface water diverted from rivers or reservoirs.
Practice Questions
Try It Yourself
QUESTION: A farmer's tubewell pumps 120 liters of water per minute. How much water will it pump in 30 minutes? | ANSWER: 3600 liters
QUESTION: If a tubewell needs to supply 18,000 liters of water to a field and it pumps 100 liters per minute, how many hours will it take to irrigate the field? | ANSWER: 3 hours
QUESTION: A farmer has a 2-acre field. Each acre needs 40,000 liters of water. His tubewell pumps 80 liters per minute. If electricity costs Rs. 8 per unit and the pump uses 4 units per hour, what is the total cost to irrigate the entire field once? | ANSWER: Rs. 533.33 (approximately)
MCQ
Quick Quiz
Which of the following is the main source of water for tubewell irrigation?
Rainwater collected in ponds
River water
Underground water (groundwater)
Melted snow from mountains
The Correct Answer Is:
C
Tubewell irrigation specifically uses a pump to draw water from deep underground, which is known as groundwater. The other options refer to different sources of water or different irrigation methods.
Real World Connection
In the Real World
In many parts of India, especially states like Punjab, Haryana, and Uttar Pradesh, tubewells are a lifeline for farmers. Farmers rely on them heavily to grow crops like rice and wheat, ensuring that we have enough food to eat. Government policies and subsidies for electricity often support farmers in running these tubewells.
Key Vocabulary
Key Terms
TUBEWELL: A long pipe drilled into the ground to draw water | GROUNDWATER: Water found beneath the Earth's surface | PUMP: A machine used to move liquids or gases | IRRIGATION: Supplying water to land or crops to help growth | AGRICULTURE: The science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
What's Next
What to Learn Next
Now that you understand tubewell irrigation, you can explore other irrigation methods like canal irrigation or drip irrigation. This will help you compare different ways farmers water their crops and understand the advantages and disadvantages of each, building on your knowledge of how our food is grown.
