The Martapura River is a significant waterway located in the province of South Kalimantan, Indonesia. It flows through the city of Martapura, which is known for its diamond mining and trading activities. The river plays a crucial role in the local economy, providing transportation and supporting various industries. The river is approximately 100 kilometers long and is an essential source of water for agriculture and daily life in the surrounding communities. It also serves as a habitat for various aquatic species, contributing to the region's biodiversity. The Martapura River is vital for both the environment and the livelihoods of local residents.