Rivers are the primary source of water in India, contributing a significant portion of the country's surface water resources.

The Ganga River is the longest river in India, stretching over 2,500 kilometers from its source in the Himalayas to its confluence with the Bay of Bengal.

The Ganga Basin is the largest river basin in India, covering an area of over 1 million square kilometers and encompassing several states in northern and eastern India.

Meghalaya, a state in northeastern India, receives the highest annual rainfall in the country, with an average of over 11,000 millimeters per year.

Aquifers are underground layers of rock or soil that contain water and are a major source of groundwater in India.

Uttar Pradesh, a state in northern India, has the largest groundwater reserves in the country.

India faces multiple challenges related to water resources, including water pollution, water scarcity, and flooding.

Water pollution in India is caused by a combination of industrial waste, agricultural runoff, and sewage discharge.

Water scarcity in India is caused by a combination of uneven distribution of water resources, increasing population, and climate change.

Flooding in India is caused by a combination of heavy rainfall, deforestation, and poor drainage systems.

The Indian government has implemented several initiatives to address water resource challenges, including the National Water Policy, National River Conservation Plan, and Atal Bhujal Yojana.

The National Water Policy aims to achieve multiple objectives, including ensuring equitable distribution of water resources, promoting sustainable water management practices, and preventing water pollution.

The National River Conservation Plan aims to achieve multiple objectives, including cleaning up polluted rivers, preventing riverbank erosion, and conserving riverine biodiversity.

The Atal Bhujal Yojana aims to achieve multiple objectives, including promoting groundwater recharge, preventing groundwater contamination, and regulating groundwater extraction.

Govind Ballabh Pant Sagar, also known as Rihand Dam, is the largest man-made lake in India, located in Uttar Pradesh.