Analysis of Slope Stability Against River Openings Due to the Influence of Sedimentation at the Tinggar Buntut Water Gate

Authors

  • Lintang Fadhila Putri Fakultas Teknik, Universitas Dr Soetomo, Surabaya, Indonesia
  • Sekar Ayu Kuncaravita Fakultas Teknik, Universitas Dr Soetomo, Surabaya, Indonesia
  • Dayat Indri Yuliastuti Fakultas Teknik, Universitas Dr Soetomo, Surabaya, Indonesia

DOI:

https://doi.org/10.51988/jtsc.v7i3.605

Keywords:

river sedimentation, slope stability, lateral earth pressure, Rankine theory, Plaxis 2D

Abstract

Sedimentation in river channels may increase lateral earth pressure and reduce slope stability around hydraulic structures. However, studies concerning the effect of sediment accumulation on sheet pile-supported slopes at irrigation structures remain limited. This study evaluates the influence of sedimentation on slope stability at the Tinggar Buntut Water Gate, Kali Sadar River, using the Rankine method and the finite element method. Soil parameters were obtained from BBWS Brantas, while the sediment thickness of 1.5 m was estimated and validated by comparing riverbed elevations derived from Google Earth Pro historical imagery between 2019 and 2025. Soil behavior was simulated using the Mohr–Coulomb model under existing and sedimented conditions. The results show that active earth pressure increased from 74.93 kN/m to 126.62 kN/m, while the safety factor decreased from 1.44 to 0.85. Numerical analysis also indicated that the safety factor decreased from 1.7342 to 1.4420, accompanied by an increase in deformation from 3.40 × 10?³ m to 9.06 × 10?³ m.

References

G. J. Arief, “Analisis Laju Erosi dan Sedimentasi Berbasis Arcgis pada DAS,” vol. 05, no. 01, pp. 583–595, 2025.

P. K. L. dan I. H. T. S. dan B. D. P. Nurul Ulil Albab, “Jurnal rekayasa sipil dan lingkungan,” vol. 5, no. September, 2025.

M. S. Dr. Naharuddin, pengelolaan DAS dan Aplikasinya dalam proses belajar mengajar. 2020.

B. Suprapto et al., “Model Reduksi Erosi dan Sedimentasi Daerah Aliran Sungai (Das) Brantas Hulu Sebagai Usaha Konservalasi lahan dan sumberdaya air,” vol. 11, no. 3, pp. 125–133, 2022.

2020. A. K. Salam, Ilmu Tanah. Yogyakarta, Indonesia, Ilmu Tanah. 2020.

A. S. L. dan D. P. T. Hakam, Stabilitas Lereng dan Dinding Penahan Tanah. 2022.

A. S. Al-banaa, “Study on slope stability of frame prestressed anchor sheet pile wall with finite element strength reduction method,” vol. 7, no. 1, pp. 49–57, 2021.

humairo Saidah, drainase perkotaan. 2021.

B. M. Das, Mekanika tanah 2 2023. 2023.

A. Malik, Y. Fajarwati, Endaryanta, M. Nuruzzaman, and N. A. Nur, Plaxis 2D Pada Permasalahan Geoteknik, no. December. 2023.

Akbar, “Analisis Sedimentasi Pada Bendung Awo Kabupaten Wajo,” J. Karajata Eng., vol. 3, no. 1, pp. 44–51, 2023, doi: 10.31850/karajata.v3i1.2058.

joseph E. Bowles, “Physical_and_Geotechnical_Properties_of.pdf,” 1989.

P. O. S. I. B. BBWS BRANTAS, “Laporan PPK OP SDA II BBWS BRANTAS.pdf,” 2023.

Adib, “Analisis Daya Dukung Aksial Tiang Tekan Hidrolik Diameter 60 cm dengan Menggunakan Metode Elemen Hingga pada Proyek Gedung Rawat Inap Tower - 1 Rs Haji Medan (Berdasarkan data BH-3),” vol. 6, no. 2, pp. 198–206, 2025, doi: 10.51988/jtsc.v6i2.304.

SNI 8460?:, Standar Nasional Indonesia 8460?: 2017 Persyaratan Perancangan Geoteknik, vol. 8460. 2017.

Rizky, “Analysis Of The Axial Bearing Capacity And Settlement Of Bored Pile Foundations Using The Finite Element Method ( Case Study?: Construction Of The Sumatera Main Stadium ),” vol. 7, no. 1, pp. 371–377, 2026.

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Published

2026-07-31

Issue

Vol. 7 No. 3 (2026): July

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Articles

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