Important World Rivers and Lakes in News for UPSC Prelims 2026

• Source: Green Spring, West Virginia, USA. | Mouth: Chesapeake Bay (Atlantic Ocean), Virginia, USA. Important Cities: Washington, D.C.
• The Arakawa, originating from Mount Kobushi (Japan) and flowing into Tokyo Bay, was officially designated as the Sister River of the Potomac River.
• Both rivers flow through their nations’ capital cities (Washington D.C. and Tokyo) and share a unique cultural bond through cherry blossoms, which bloom along both riverbanks.

• Tapajós River has hit historic lows amid severe drought, prompting it to declare its first-ever water scarcity emergency for the lower stretch.

• It is entirely located in Brazil.
• Source: Mato Grosso, Brazil | Mouth: Amazon River, Northern Brazil.
• Almost the entire length of the river is navigable.

• Declining water levels in the Parana River in Argentina have disrupted soyabean oil transport. Source: Brazil.
• Mouth: Uruguay, Atlantic Ocean.
• Important Cities: Brasilia & São Paulo (Brazil), Asunción (Paraguay), and Buenos Aires (Argentina).

• Location: Freshwater lake in Sakarya Province, Turkiye, between Gulf of İzmit & Adapazari Meadow.
• Geography: Lies in a tectonic depression, running parallel to Iznik Lake, surrounded by mountains in the south and small hills in the north.
• Fed by small streams from surrounding mountains, serving as a primary freshwater source for domestic and industrial use.

Turkiye

• Turkiye shares land borders with Bulgaria, Greece, Georgia, Armenia, Azerbaijan, Iran, Iraq, and Syria and maritime borders with Cyprus, Egypt, Romania, Russia, and Ukraine.
• Turkiye (WWF 2021) has been declared water-stressed due to poor water management & urbanisation.

• Changes in Lake Turkana’s water levels affected fault movement & magma generation in Lake Turkana.
• World’s largest permanent desert lake and the largest alkaline lake, mainly situated in Kenya’s Great Rift Valley. Its northern end extends into Ethiopia.
• Known as “Jade Sea” for its turquoise colour, its basin was declared a UNESCO World Heritage Site in 1997
• Turkana Basin is a significant paleoanthropological site, often referred to as the “Cradle of Humankind” due to numerous hominin fossil discoveries.
• Three rivers, Omo, Turkwel, and Kerio, feed the lake, with the Omo River contributing nearly 90% of the total inflow.
• It has the world’s largest breeding colony of Nile crocodiles.

• Great Bitter Lake is a crucial water body in Egypt located along the Suez Canal, which serves as a passage for international maritime trade.

• Situated in Egypt, spanning ~ 60 km², it is a saltwater lake between the Mediterranean Sea and the Red Sea, connected to both seas through the Suez Canal.
• The site was originally a dry salt valley before the construction of the Suez Canal.
• Evidence of trade routes via the Suez Canal dates back to the era of Pharaoh Senausret III, suggesting the region’s historical significance for maritime commerce.
• The Suez Canal, with the Great Bitter Lake as a key component, shortens the maritime route between Europe and Asia by up to 7,000 kilometres.

• Seine River was opened for Public swimming for the first time since 1923.

• Location: Paris, empties into the English Channel at Le Havre.
• Length: 775 km, France’s second-longest river after Loire.
• Flows through Paris for about 13 kilometres from west to east, joined by the Marne River.
• Drainage Basin: Covers approximately 79,000 square km, draining northern France.

• Great Ruaha River, one of Tanzania’s major rivers, is drying up due to climate change and mismanagement.

• Originates in Kipengere mountains and stretches roughly 84,000 km, flowing through the wetlands of the Usangu valley and the Ruaha national park, eventually emptying into the Rufiji river.

• Kazakhstan Urges Regional Cooperation to Save the Aral Sea.

• Aral Sea is an endorheic lake (lake with no outlet) located in the heart of Central Asia, roughly 200 miles east of the Caspian Sea.
• Bordered by Kazakhstan on the north and Uzbekistan on the south. It was formerly a large saltwater lake.
• Once the fourth largest body of inland water in the world, it lost almost three-quarters of its volume and approximately half of its area.
• Reasons: The drying up of the Aral Sea resulted mainly from the overuse of its two main tributaries—the Amu Darya and the Syr Darya—for irrigation.

• Colorado River basin has lost over 10 trillion gallons of water in two decades due to the climate crisis. Source: Continental Divide, Colorado, USA.
• Mouth: Gulf of California (Pacific Ocean), Mexico.
• Important Cities: Las Vegas, Los Angeles, and San Diego.
• The Grand Canyon is an important feature.

• It experienced a second flood in 2024, and the water in the Three Georges Dam rose to record levels.
• Source: Tanggula Mountains, China. | Mouth: Yangtze Delta, East China Sea.
• Important Cities: Shanghai and Wuhan.
• Longest river in Asia (~6,300 km) and the third longest river in the world (1^st – Nile; 2^nd – Amazon).

• Georgia’s Flint River, rich in biodiversity and vital for the region, faces growing stress from climate change, floods, droughts, and increasing human impact.
• Source: Georgia, USA. | Mouth: Apalachicola River, Lake Seminole (Georgia-Florida border), USA.

• Severe flooding in North Queensland (Australia) caused the Herbert River to reach record levels.
• Source: Great Dividing Range, Australia. | Mouth: Coral Sea, Pacific Ocean.

• Tulare Lake in California, which had vanished over a century ago, made a comeback in 2023 due to a series of intense atmospheric river events.
• Situated in the San Joaquin Valley, California, USA.
• Once recognized as the largest freshwater lake located west of the Mississippi River.
• Replenished by the Kern River, which is fed by snowmelt from the southern Sierra Nevada.

• India backed Afghanistan’s plan to build a dam on the Kunar River.

• Kunar River is a transboundary river that flows through northern Pakistan and eastern Afghanistan.
• Origin: Chiantar glacier in the Hindu Kush mountains at the border of Gilgit-Baltistan and Chitral, Pakistan.
• It joins Kabul River in Afghanistan. The combined waters then flow eastward back into Pakistan, eventually merging with the Indus River.
• Major Tributaries: Lutkho, Landai Sin, Shishi (left bank), and Pech (right bank).