Study on flow regime change due to weir construction plan in Batang Asai River, Sarolangun, Province of Jambi

Abstract

The weir design process not only considers the location, dimensions, strength, and durability of the weir structure, but must also be consider the effect on the flow characteristics in the river after the weir, especially related to the flow velocity characteristic around the weir. The water level will rise and affect the flow velocity downstream of the weir. Because of the fall of water, the velocity will greatly increase and the river can erode. The weir construction on the Batang Asai River, specifically located in Sarolangun, Province of Jambi, has unique conditions that cause the velocity of water after the weir to increase. Several alternatives will be analysed as solutions to deal with changes in flow velocity. The alternatives are groundsill, riverbed normalization, and river crossing widening. It was found that the alternative of river widening showed a significant reduction in flow velocity.

Effect Of Bridge Piers On Local Scouring At Alue Buloh Bridge Nagan Raya Regency

“…Flowing water in the river is usually accompanied by scouring and sedimentation processes. The process of scouring that occurs can be caused by river morphological conditions and the existence of piers that obstruct the flow (Rizaldi et al 2020).…”