Studies conducted over the last ten years have resulted in the construction
of a lock and barrage on the Sarawak River in the state of Sarawak, Malays
ia. The barrage controls river and tidal flows and has eliminated most of t
he tidal variation in water level which was formerly experienced in Kuching
, the state capital of Sarawak. This paper reviews the hydrotechnical and g
eotechnical studies of the river and outlines the current operation and eff
ects of the barrage.