ABSTRACT The coastline of Bengkalis Island has changed in recent years due to high abrasion rates, reaching up to 32.75 m / year. In general, there has been a lot of damage in the form of coastal abrasion and destruction of mangrove forests in the coastal areas of Bengkalis Island. One of the phenomena of peat damage on the north coast of Bengkalis Island that occurs is the bog burst phenomeno…