Kalu Ganga, also known as the Kalu River, is a significant river located in Sri Lanka. It flows through the western part of the country, primarily in the Kalutara District. The river is approximately 129 kilometers long and is known for its rich biodiversity and scenic landscapes. The Kalu Ganga is an important water source for irrigation and supports local agriculture. It also plays a vital role in the ecosystem, providing habitat for various species of fish and wildlife. The river eventually empties into the Indian Ocean, contributing to the coastal environment of Sri Lanka.