Tegangan Geser Kritis di Hulu Bendung, Studi Kasus Pada Bendung Sekka-Sekka, Kabupaten Polewali Mandar
Abstract
The upstream section of the Sekka-Sekka Weir plays an important role in the irrigation water distribution system but is highly vulnerable to sedimentation due to severe bed erosion. Excessive sedimentation can reduce the weir’s storage capacity and hinder irrigation efficiency. Therefore, this study aims to analyze flow shear stress and critical shear stress to understand the potential for sediment transport in the area. A quantitative approach was used by simulating flow conditions with HEC-RAS to obtain flow characteristics and river cross-sections under three discharge conditions: maximum, minimum, and average. Sediment samples were collected from the field and analyzed in the laboratory using sieve analysis and specific gravity tests, while critical shear stress was determined using the Shields diagram. The results showed that under maximum discharge, flow shear stress (6.169–6.181 kg/m²) far exceeded the critical shear stress (0.003–0.007 kg/m²), indicating a high potential for bed erosion. Under minimum and average discharge, flow shear stress still exceeded the critical value, but sediment transport occurred with lower intensity and more stable flow conditions. Overall, the upstream flow is capable of mobilizing sediment significantly, so proper sediment management is needed to maintain the optimal function of the weir.
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Dewana, A. P. (2022). Analisis Laju Sedimentasi Di Muara Sungai Panjang, Desa Bejalen, Kecamatan Ambarawa, Kabupaten Semarang Sebagai Kontributor Sedimentasi Di Rawa Pening. 1–116.
Gianete, B. P. (2023). Analisis Angkutan Sedimen Dasar (Bed Load) Dengan Menggunakan Metode M.P.M Dan Einstein Pada Bendung Pesongoran Lombok Barat.
Hermawan, A., Afiato, E. N., Studi, P., Sipil, T., Studi, P., & Sipil, T. (2021). ANALISIS ANGKUTAN SEDIMEN DASAR ( BED LOAD ). XXVI(1).
Ikhsani, C., & Pratama, W. Y. (2017). Evaluasi analisis tegangan geser pada daerah hulu dan hilir sudetan wonosari sungai bengawan solo 3) 1) 2). 2012, 464–468.
Ishakputra, J. A., Lestari, S., Yuniarti, T., Al Akbar, B. F., Herlambang, I. F., Asyraf, M. R., & Rachman, M. A. (2024). Rekayasa Hidraulik untuk Pengendalian Sedimentasi pada Bendungan Sengguruh. Jurnal Teknik Sumber Daya Air, 4(2), 219–230. https://doi.org/10.56860/jtsda.v4i2.108
Mattotorang, U. H. (2019). Studi Pengaruh Lebar Sungai Terhadap Karakteristik Aliran Sedimen Di Dasar. PENA TEKNIK: Jurnal Ilmiah Ilmu-Ilmu Teknik, 4(1), 77. https://doi.org/10.51557/pt_jiit.v4i1.217
Nasional, B. S. (2008). SNI 1969:2008 Cara Uji Berat Jenis dan Penyerapan Air Agregat Kasar. Badan Standar Nasional Indonesia, 20.
Prismayuda, O. B., Purnama, A., & Najimuddin, D. (2020). Analisis Distribusi Kecepatan Pada Saluran Terbuka (Study Kasus : Sungai Pelat, Desa Pelat). Jurnal SainTekA, 1(1), 1–10.
Rahman N, M. F., & Khaidir, M. (2021). Pengukuran Aliran Air Dan Tinggi Muka Air Pada Saluran Irigasi Dengan Hall Effect Sensor Dan Ultrasonik. Jurnal Teknologi Dan Komputer (JTEK), 1(01), 61–65. https://doi.org/10.56923/jtek.v1i01.54
Ramadhan, M., Wibowo, H., & Kartini. (2020). Perhitungan Angkutan Sedimen Pada Sungai Pangkalan. Jurnal Mahasiswa Teknik Sipil UNTAN, 1–9.
Rohani, I., Paroka, D., Thaha, M. A., & Hatta, M. P. (2021). Dimensional Analysis of Compound Section in the Regulate Section Channel Model for Maintenance Main Channel. IOP Conference Series: Earth and Environmental Science, 921(1). https://doi.org/10.1088/1755-1315/921/1/012076
SNI 1964:2008. (2008). Standar Nasional Indonesia, Metode Pengujian Berat Jenis Tanah.
Suryadi, Y., Siregar, R. H., Harlan, D., & Samskerta, I. P. (2024). Hydrodynamic and Sediment Transport Modeling at Lower Citarum and Cibeet River Confluence West Java. Jurnal Teknik Hidraulik, 15(1), 1–14.
Yuhadi Husein, L. (2023). Kajian Gerak Awal Butiran Sedimen Dasar Sebagai Fungsi Diameter Sedimen Dasar : Skala Laboratorium.
Yulianti, D., Ulfah, L., Lubis, lega reskita, & Haki, H. (2025). Jurnal Talenta Sipil. Jurnal Talenta Sipil, 8(1), 430–439. https://doi.org/10.33087/talentasipil.v8i2.888
DOI: http://dx.doi.org/10.33087/talentasipil.v8i2.973
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