Meghalaya's Lukha River: India's 'Blue River' and Its Scientific Secret

• The Lukha River in Meghalaya's East Jaintia Hills is known as India's 'Blue River' due to its stunning blue hue in winter.
• The river's blue color is a result of a chemical reaction between its naturally alkaline water and acidic water from the Lunar River, producing limestone-related particles.
• During the dry winter season, low water flow and stable conditions allow sunlight to reflect predominantly blue from these particles, creating the sapphire effect.
• This seasonal phenomenon disappears during monsoons when floodwaters and mud turn the river brown, indicating its sensitivity to environmental changes.
• The Lukha River is vital for the local ecosystem, serving as an animal corridor, supporting local flora and fauna, and boosting winter tourism.

Why It Matters: Meghalaya's Lukha River transforms into a 'Blue River' in winter due to a unique chemical reaction.