Sri Lanka is home to several major rivers that play a crucial role in the island's ecology and economy. The longest river, the Mahaweli, stretches over 335 kilometers and is vital for irrigation and hydroelectric power. Other significant rivers include the Kelani, Walawe, and Kalu, each contributing to agriculture and providing water for local communities. These rivers originate mainly from the central highlands and flow towards the coast, creating diverse ecosystems along their banks. They support various wildlife and are essential for fishing and transportation. The rivers also face challenges such as pollution and deforestation, impacting their health and the communities that rely on them.