Water Resources and Scarcity in India

Global and National Water Distribution

• The Earth is often referred to as the "Blue Planet" because a significant portion of its surface is covered by water.
• Approximately $3/4$ (three-quarters) of the total surface of the Earth is covered by water.
• In India, the distribution of water resources is characterized by extreme unevenness.
• Regional Rainfall Statistics in India:
  • $21\%$ of the country's total area receives less than $750\,mm$ of rainfall annually.
  • $15\%$ of the country's area receives rainfall exceeding $1500\,mm$ annually.
  • The highest rainfall in the world is recorded at Mawsynram, located near Cherrapunji in the state of Meghalaya in the north-eastern region of India. The annual record is approximately $11,690\,mm$.
  • In the Mawsynram region, daily rainfall can reach as much as $1040\,mm$.
  • Conversely, arid regions such as Jaisalmer in Rajasthan receive extremely low rainfall, barely reaching $150\,mm$.
• Temporal Concentration of Rainfall:
  • Nearly $3/4$ of India's annual rain occurs within a period of less than $120$ days.
  • This rainfall is concentrated primarily from the month of June to September.

Understanding Water Scarcity

• Water scarcity is a significant problem in India, appearing even in regions that are considered water-rich.
• The fundamental causes of scarcity are rooted in the misuse, abuse, and unequal access to water resources.
• Definition and Thresholds:
  • Water scarcity refers to the shortage of potable (drinkable) water required to meet minimum human demands.
  • A country is classified as water scarce if its per capita water availability falls below $1000\,m^2$ per year.

Primary Causes of Water Scarcity in India

• India is naturally endowed with rich water resources; however, several factors have led to the over-exploitation and degradation of these assets over recent decades.
• Population and Economic Development:
  • Increasing population density has placed unprecedented demand on water.
  • Rapid development across all economic sectors has led to increased water consumption.
• Agricultural Factors:
  • Substantial increases in demand for irrigation have strained resources.
  • Agricultural runoff: Water from fields often mixes with fertilizers and pesticides before reaching lakes or rivers, leading to severe pollution.
• Industrial Impact:
  • Industries require water on a massive scale for production processes.
  • Industrial effluents: The release of untreated waste water (effluents) causes extensive pollution, rendering available water resources useless for any other functional purpose.
• Urbanization:
  • Rising urbanization has applied extreme pressure on existing water infrastructure.
  • Notable water shortages are consistently faced in major metropolitan areas, including Delhi, Mumbai, and Chennai.
• Energy Production:
  • The storage of water for power generation reduces the volume of water available for direct consumption.
  • Hydroelectricity currently contributes $22\%$ of the total power generation in India.
  • Energy is required across sectors including industries, agriculture, transport, and urban management, further driving water demand.
• Pollution and Degradation:
  • Many rivers in India have been degraded to the status of "sewage flowing drains."
  • Sources of pollution include agricultural activities, industrial discharge, mining operations, transport runoff, and untreated sewage from human settlements (especially large cities).
  • The accumulation of garbage thrown directly into rivers exacerbates the scarcity of clean water.

Water Conservation

• Water is a finite and scarce resource, making its conservation essential for a sustained supply and a secure future.
• Definition of Water Conservation:
  • Any beneficial reduction in water loss, use, or waste.
  • The active preservation of water quality.
• Urgency of Action:
  • The current levels of misuse and abuse call for immediate action to protect water assets.
  • There is a critical need for proper planning, development, and management of water resources, which are considered one of the country's greatest assets.

Miscellaneous Fragments

• The transcript contains a brief reference to a localized context involving "यमलोक" (Yamlok) and the character "भोला राम" (Bhola Ram).
• Mention is made of "धर्मराज" (Dharmaraj) being troubled by the disappearance of a soul (जीव), noting that if souls continue to disappear, the distinction between sin (पाप) and virtue (पुण्य) might vanish.
• Bhola Ram's soul is noted as missing, which has caused distress to the entities in Yamlok, with mentions of exhaustion and fear visible on the characters' faces due to the situation.