Hulu Jelai

Hulu Jelai is the upper river country of the Jelai in southern Borneo. Its streams descend through the forested interior toward the lower river and the Java Sea. Downstream, the Jelai is joined by the Mapam, one of the tributaries that add water to its course. The river forms a long natural connection between inland forests and the lowlands near the coast, where its waters are affected by the tides.