Open AccessStudy on flow regime change due to weir construction plan in Batang Asai River, Sarolangun, Province of Jambi
Author(s) -
Akbar Rizaldi,
Mohammad Farid,
Idham Riyando Moe,
Herryan Kendra
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/437/1/012012
Subject(s) - weir , flow velocity , hydrology (agriculture) , flow (mathematics) , environmental science , normalization (sociology) , geology , geotechnical engineering , geography , mechanics , cartography , physics , sociology , anthropology
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.