Irrigation Systems — Set 8

Correct Answer: A. It promoted large-scale irrigation development and increased agricultural productivity

The correct answer is It promoted large-scale irrigation development and increased agricultural productivity. The Green Revolution (1960s-1970s) was characterized by massive expansion of irrigation infrastructure, development of high-yielding crop varieties, and adoption of modern farming techniques. It transformed Indian agriculture, dramatically increased food production, and made India self-sufficient in food grains. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To allow rainwater to percolate into the ground and recharge aquifers

The correct answer is To allow rainwater to percolate into the ground and recharge aquifers. A recharge pit is a structure designed to facilitate rainwater infiltration into the ground, replenishing groundwater aquifers. Commonly used in urban and rural areas, recharge pits collect surface runoff and direct it underground, increasing groundwater availability and reducing flooding. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Godavari Canal System

The Godavari Canal System in South India (Andhra Pradesh and Telangana) is one of the major irrigation networks, fed by the Godavari River. It irrigates millions of hectares and supports cultivation of rice, sugarcane, and cotton. The Ganga, Sutlej, and Beas Canals are major systems in North India.

Correct Answer: A. Silt deposition and canal seepage losses

Canal irrigation systems face major challenges of silt deposition, which reduces canal capacity and requires regular dredging. Canal seepage losses occur through bed and banks, reducing water availability downstream. Regular maintenance is essential for efficient canal operation and water conservation.

Correct Answer: A. Optimal use of both surface and groundwater to ensure year-round water availability

The correct answer is Optimal use of both surface and groundwater to ensure year-round water availability. Conjunctive use (combined use of surface and groundwater) optimizes water availability throughout the year by using surface water during monsoon and groundwater during dry seasons. This strategy improves water security, reduces groundwater depletion, and ensures sustainable irrigation across seasons. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Essential for crop production as rainfall is very low

The correct answer is Essential for crop production as rainfall is very low. In arid regions like Rajasthan, Himachal Pradesh, and parts of Gujarat with low rainfall (< 500 mm annually), irrigation is absolutely essential for agriculture. Without irrigation, crop cultivation is impossible, making irrigation infrastructure and water conservation critical for food security and livelihoods. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Sprinkler and drip irrigation

Sprinkler and drip irrigation are most suitable for sloping terrain as they work independently of topography. They distribute water uniformly despite height variations, reduce soil erosion on slopes, and allow flexible positioning of outlets. These methods are ideal for hilly agricultural regions.

Correct Answer: A. Polluted water can harm crops, contaminate soil, and accumulate toxic substances

The correct answer is Polluted water can harm crops, contaminate soil, and accumulate toxic substances. Polluted irrigation water containing heavy metals, chemicals, or pathogens can harm crops, contaminate soil and groundwater, and pose health risks through food chain contamination. Water quality monitoring and pollution control are essential for safe irrigation and sustainable agriculture. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Millets and pulses

The correct answer is Millets and pulses. Millets (jowar, bajra) and pulses require much less irrigation water (300-400 mm) compared to rice (1000-1200 mm) or sugarcane (2000-2500 mm). These are drought-tolerant crops suited to water-scarce regions and promote sustainable agriculture with reduced water dependence. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. To manage water distribution and resolve disputes among farmers

The correct answer is To manage water distribution and resolve disputes among farmers. Irrigation cooperatives are farmer organizations that manage water distribution from irrigation systems, maintain infrastructure, collect fees, and resolve disputes. They play a crucial role in ensuring equitable water sharing, efficient resource management, and sustainable irrigation at the community level. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.