Water Resources

Step 1: Understanding National Waterways.
India has developed several inland waterways for the purpose of cargo transport and navigation. These are officially numbered as National Waterways (NW). The numbering is based on geographical coverage and navigable length.
Step 2: Explanation.
National Waterway No. 1 (NW-1) is the longest waterway in India. It runs along the Ganga–Bhagirathi–Hooghly river system between Allahabad (Prayagraj) and Haldia, covering approximately 1,620 km.
Step 3: Analyzing the options.
(A) National Waterway No. 1: Correct. It is the longest waterway in India.
(B) National Waterway No. 2: Incorrect. It is located on the Brahmaputra River in Assam.
(C) National Waterway No. 3: Incorrect. It lies in Kerala, along the West Coast Canal.
(D) National Waterway No. 4: Incorrect. It runs through Andhra Pradesh and Tamil Nadu but is shorter.
Step 4: Conclusion.
Hence, the longest national waterway in India is National Waterway No. 1.

Step 1: Understanding Harike Barrage.
The Harike Barrage is a major water control structure located at the confluence of the Beas and Sutlej rivers. It plays a vital role in irrigation and water supply for northern India.
Step 2: Location details.
Harike Barrage is situated near Harike village in the Tarn Taran district of Punjab. It helps divert water to the Indira Gandhi Canal and other irrigation systems.
Step 3: Analyzing the options.
(A) Rajasthan: Incorrect. The barrage helps supply water to Rajasthan but is not located there.
(B) Punjab: Correct. Harike Barrage is in Punjab.
(C) Haryana: Incorrect. It is not located in Haryana.
(D) Karnataka: Incorrect. Karnataka is in southern India, far from the site.
Step 4: Conclusion.
Therefore, the Harike Barrage is located in the state of Punjab.

The drinking water crisis in India arises due to the overuse, pollution, and unequal distribution of water resources. Rapid urbanization, industrial growth, and population pressure have increased the demand for clean water while reducing its availability.
Step 1: Over-extraction of Groundwater.
Excessive withdrawal of groundwater for agricultural and domestic purposes has lowered water tables in many regions, creating scarcity.
Step 2: Pollution of Water Sources.
Industrial effluents, agricultural chemicals, and sewage discharge into rivers and lakes have contaminated many water sources, making them unsafe for drinking.
Step 3: Unequal Distribution and Poor Management.
Water resources are unevenly distributed across India. Inadequate planning and poor infrastructure contribute to the crisis, particularly in drought-prone and densely populated areas.
Step 4: Climate Change.
Irregular rainfall patterns, prolonged droughts, and depletion of glaciers due to climate change further reduce the availability of clean water.
Step 5: Conclusion.
Therefore, sustainable water management, pollution control, and public awareness are essential to address India’s drinking water crisis.

Watershed management refers to the conservation, development, and management of water, soil, and other natural resources within a watershed area. It involves maintaining the balance of ecosystem processes to ensure sustainable use of resources and prevention of soil erosion and water scarcity.
Step 1: Definition.
A watershed is an area of land where all rainfall drains to a common outlet, such as a river, lake, or ocean. Watershed management includes planning and implementing measures to optimize water usage and protect the environment.
Step 2: Objectives of Watershed Management.
The main objectives include soil conservation, water harvesting, afforestation, and sustainable agricultural practices. These help in improving land productivity and ensuring water availability throughout the year.
Step 3: Benefits.
Watershed management helps in preventing floods, increasing groundwater levels, improving agricultural yield, and maintaining ecological balance. It promotes community participation for sustainable development.

Step 1: Identify the Hirakud project. The Hirakud project refers to the Hirakud Dam.

Step 2: Locate the project. The Hirakud Dam is built across the Mahanadi River, about 15 kilometers from Sambalpur in the state of Odisha in India. It is one of the longest man-made dams in the world.