Study of erosion and sedimentation in urban areas for river with meander pattern

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Murniningsih, S.^1

Head of Laboratory of Hydraulics, Hydrology and River, Civil Engineering Department, Jakarta, Indonesia^1

关键词: Channel migration;    Cliff erosion;    Curved channels;    Different soils;    Erosion and sedimentation;    Physical model;    Qualitative approach;    Soil composition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012127/pdf
DOI  :  10.1088/1755-1315/191/1/012127

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Most of the river in Indonesia has a meander pattern particularly located in urban area. Since the river plains and delta consist of alluvial soils, thus, Meander River in urban area usually encourage sediment transport problem for instance river cliff erosion or bank erosion in outer meander bend and sedimentation in the inside of the meander bend that affect migration of the channel. However, to solve problems in the area of meanders is not easy, because the factors that affect the movement of the river flow and channel migration are very complex. Therefore, simulation of channel migration is increasingly required to assess the risk especially from erosion and sedimentation along meander bend. To simulate the process be approached with built a physical modeling of curved channel at hydraulics indoor laboratory with two different soil classification and composition. This model constructed on mobile bed table apparatus, whereas, the table covered by clayey silt material and sandy silt material with 80 mm thickness. Laboratory findings concluded soil composition with high percentage of silt would be change rapidly compare than soil composition with low percentage of silt. The result of the experiment its qualitative approach without quantifying of sedimentation in the inner bend and erodible sand in the outer bank.