 These rivers are Sungai Bernam, Sungai Selangor, Sungai Klang and Sungai Langat.The Park area also feeds the five water-supply reservoirs that provide 98% of the water supply to Selangor, Kuala Lumpur and Putrajaya.These dams are the Sungai Selangor, Batu, Klang Gates, Langat and Semenyih dams.