Teesta River Project and India-Bangladesh Water Dynamics

Teesta River Project and India-Bangladesh Water Dynamics

#GS-1 #Geography #Physical Geography #Resources #GS-3 #Current Events #International #National #Teesta River #India-Bangladesh Relations #Siliguri Corridor

Why in News

  • Bangladesh signed a strategic agreement with China to accelerate feasibility studies for the Teesta River Comprehensive Management and Restoration Project (TRCMRP).

Overview of the Teesta River

  • The Teesta River is a fast-flowing, glacier-fed transboundary river in South Asia.
  • It acts as a primary water source for Sikkim and West Bengal, while supporting agriculture in northwestern Bangladesh.

Origin and Course

  • The river originates at an elevation of over 5,000 meters in the Eastern Himalayas from Tso Lhamo Lake and the Teesta Khangse glacier in North Sikkim.
  • In India, it flows through the mountainous terrain of Sikkim and the northern plains of West Bengal, including Darjeeling, Kalimpong, and Jalpaiguri districts.
  • In Bangladesh, it travels through the Rangpur Division across Nilphamari and Rangpur districts.
  • The Teesta eventually joins the Jamuna River at Fulchhari, serving as a major tributary of the Brahmaputra river system.

Tributaries of the Teesta River

  • Right-bank tributaries of the river include Dik Chhu, Kanaka Chhu, Rangyong Chhu, and Rangeet River.
  • Left-bank tributaries consist of Lachung Chhu, Lachen Chhu, Chakung Chhu, and Rani Khola.

Key Geological Features

  • In Sikkim, the river cuts through steep Himalayan gorges with fast currents and carries huge volumes of sediment.
  • At Sevoke, it enters the flat terrain, slows down, deposits silt, and broadens across the Terai region.
  • In Bangladesh, the river splits into multiple shifting channels and sandbars, creating fertile land while causing frequent monsoon floods.

Geopolitical and Strategic Significance

  • The Teesta Basin lies close to the narrow Siliguri Corridor, making foreign infrastructure projects a direct national security concern for India.
  • Water sharing during the dry season remains a core dispute between India and Bangladesh, as West Bengal opposes additional upstream water diversion.
  • Growing Chinese involvement in Bangladesh river management turns the basin into a strategic competitive hotspot in South Asia.