ABSTRACT The Peat Hydrological Unit (PHU) of Rangsang Island is one of the PHUs in Riau Province which is located on the east coast and is directly opposite the Malacca Strait. Due to the high land conversion, the peatland of PHU Rangsang Island is degraded and continuously emits emissions. The PHU of Rangsang Island is one of the target PHUs for the Riau Province priority Annual Action Pl…