Btg. Lupar river in Sri Aman is famous for its tidal bore. Tidal bore is a form of tidal waves occur twice daily usually one in the morning and another in the afternoon. The size of the tidal waves varies throughout the month depending on the water level and also the position of the moon.
At certain time of the month, the tidal bore can get very large and the sight is so amazing. However, the recent tidal bore in Sri Aman is not that big as shown in the photos below. All boats must stay away from the river bank when the tidal bore arrives in order to prevent their boat from any damage.
Since the operation of the upstream hydroelectric dam, the size of the tidal bore is becoming smaller. Prior to that, the size of the tidal bore is so significant that the river bank of Btg Lupar river can easily eroded and cause significant loss to the community.