Indonesia is home to many rivers that play a crucial role in the country's ecosystem and economy. The longest river, the Kapuas, stretches over 1,000 kilometers in West Kalimantan. These rivers provide water for agriculture, transportation, and fishing, supporting the livelihoods of millions of people. Many Indonesian rivers are also vital for biodiversity, hosting unique flora and fauna. The Mahakam River in East Kalimantan is known for its rich wildlife, including the endangered Bornean orangutan. Additionally, rivers like the Ciliwung in Jakarta face challenges such as pollution and urban development, impacting their health and the communities that depend on them.