Irrigation Systems — Set 3

Correct Answer: A. To store water and regulate its flow for irrigation and power generation

A dam is a barrier built across a river to store water in a reservoir and regulate its flow. Dams serve multiple purposes including irrigation water supply, hydroelectric power generation, flood control, and drinking water supply. They are essential for managing water resources in agricultural regions.

Correct Answer: A. Maintaining optimal soil water content for crop growth

Soil moisture management involves maintaining optimal water content in soil for plant growth and development. This includes proper irrigation scheduling, mulching to retain moisture, and drainage to prevent waterlogging. Proper soil moisture management improves crop yields and resource efficiency.

Correct Answer: A. Sardar Sarovar Dam

Sardar Sarovar Dam is built on the Narmada River in Gujarat. It is one of the largest dam projects in India, providing irrigation, hydroelectric power, and drinking water to Gujarat, Rajasthan, and Madhya Pradesh. The project has been significant for agricultural development in these states.

Correct Answer: A. Delivers water directly to plant roots underground, reducing evaporation

Subsurface drip irrigation (SDI) delivers water through underground drip lines directly to the root zone of plants. This method minimizes evaporation losses, reduces weed growth, prevents disease spread through water, and is highly efficient. It is increasingly used for high-value crops.

Correct Answer: A. Sprinkler irrigation

Sprinkler irrigation is most suitable for hilly and undulating terrain where flood irrigation is difficult due to topography. It works efficiently on slopes, distributes water uniformly despite height variations, and reduces soil erosion on hillsides. It is widely used in hill stations for vegetable and fruit cultivation.

Correct Answer: A. To manage water resources and provide irrigation to Southern India

The correct answer is To manage water resources and provide irrigation to Southern India. The Krishna Godavari Basin project involves the management and utilization of water resources from the Krishna and Godavari rivers for irrigation and other purposes. It includes multiple dams and canals providing irrigation to several states in Southern India, supporting agricultural development. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Implementing measures to prevent or minimize flood damage to crops

The correct answer is Implementing measures to prevent or minimize flood damage to crops. Flood management in agriculture involves implementing structures and practices to prevent or minimize crop damage during floods. This includes building embankments, creating flood channels, constructing retention ponds, improving drainage systems, and developing flood-resistant crop varieties to protect agricultural lands. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Stepwells or Baolis

Stepwells (Baolis) are traditional water harvesting structures in India, particularly common in Rajasthan and Gujarat. These structures have steps leading down to the water level and were used historically to access groundwater and store water during dry seasons. They are examples of indigenous sustainable water management.

Correct Answer: A. To slow water runoff and increase soil water retention on hillsides

The correct answer is To slow water runoff and increase soil water retention on hillsides. Contour bunding involves constructing bunds (small embankments) along contour lines on hillsides to slow water runoff and increase soil water retention. This practice prevents soil erosion, increases groundwater recharge, reduces water loss, and improves land productivity in hilly regions. This topic is frequently tested in competitive examinations such as RRB NTPC, SSC, and UPSC.

Correct Answer: A. Rajasthan

Rajasthan is one of the most water-scarce states in India with low rainfall and high evaporation. The state faces significant challenges in agricultural water management, making efficient irrigation technologies like drip irrigation essential. Water harvesting and groundwater management are critical for agricultural sustainability in Rajasthan.