Irrigation Systems — Set 1

Correct Answer: A. To transport water from rivers to agricultural fields

The correct answer is To transport water from rivers to agricultural fields. Canal irrigation is a system where water from rivers or dams is transported through man-made channels (canals) to irrigate agricultural fields. It is one of the most common irrigation methods in India, covering millions of hectares of agricultural land and providing water during dry seasons. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: D. Aerial irrigation

Aerial irrigation is not a practical or widely used irrigation method in India. The main irrigation systems used are canal irrigation, well irrigation (including tubewells and bore wells), sprinkler irrigation, and drip irrigation. Each of these serves specific needs and soil conditions.

Correct Answer: A. Efficient water delivery directly to plant roots

The correct answer is Efficient water delivery directly to plant roots. Drip irrigation delivers water directly to the root zone of plants through small diameter plastic pipes with emitters. This method is highly efficient, reducing water wastage by 30-60% compared to traditional methods, and is ideal for vegetables, fruits, and crops with high water requirements. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: C. Tehri Dam

Tehri Dam, located on the Bhagirathi River in Uttarakhand, is the highest dam in India at 260.5 meters. It is a multipurpose project that provides irrigation, hydroelectric power, and drinking water. Bhakra Nangal Dam at 226 meters is the second highest.

Correct Answer: A. To collect and store rainwater for agricultural use

The correct answer is To collect and store rainwater for agricultural use. Water harvesting involves capturing and storing rainwater during the monsoon season for use during dry periods. This sustainable practice is crucial in drought-prone regions and helps maintain groundwater levels, reduces dependency on external water sources, and improves soil moisture. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Uttar Pradesh

The correct answer is Uttar Pradesh. Uttar Pradesh has the largest canal network in India, spanning thousands of kilometers. The state's canal system, primarily fed by the Ganges and Yamuna rivers, irrigates vast tracts of agricultural land and supports the cultivation of wheat, rice, sugarcane, and other crops. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Sustainable extraction and conservation of groundwater resources

The correct answer is Sustainable extraction and conservation of groundwater resources. Groundwater management involves the sustainable and efficient extraction, use, and conservation of groundwater resources. It includes monitoring water levels, preventing overexploitation, reducing water table depletion, and implementing measures like rainwater recharging and watershed management to ensure long-term availability. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Drip irrigation

The correct answer is Drip irrigation. Drip irrigation is the most water-efficient method, delivering water directly to plant roots with minimal evaporation or runoff losses. It can save up to 60% of water compared to flood irrigation and is particularly beneficial in water-scarce regions and for high-value crops like fruits and vegetables. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Sharing water resources between India and Pakistan

The correct answer is Sharing water resources between India and Pakistan. The Indus Waters Treaty, signed in 1960 between India and Pakistan, is an international agreement for sharing the waters of the Indus River and its tributaries. It allocates three eastern tributaries (Sutlej, Beas, Ravi) to India and three western rivers (Indus, Chenab, Jhelum) to Pakistan, making it one of the world's most successful water-sharing agreements. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Uniform water distribution and reduced water usage

Sprinkler irrigation sprays water through the air onto crops, providing uniform water distribution across the field. It reduces water wastage by 20-30% compared to flood irrigation, works on uneven terrain, saves labor, and is suitable for most crops. It also reduces soil erosion and improves irrigation efficiency.