**7. Rivers of Pahang National Parks**

A few kilometres upstream of Tahan River, a spectacular view greets the visitors as one can observe the convergence between two rivers that has two different colours; Tahan River, a coffee-coloured river, and Tenor River with greenish colour due to its mineral contents. The dark colour results from the tannins released from the decaying leaves and organic materials of the vegetation in the area. However, in the monsoon season, this river loses its clarity and colour due to the sedimentation from the runoff of the surrounding forest. Another tributary is the Keniam River, where it is considered as a clearwater river as the water only receives minimal loading of suspended matter. Rapids and ancient rock beds are common, hence, the water has a higher pH than other tributaries.
