Simulation of Sediment Transport in the Upper Reach of Al-Gharraf River

Daham, Mariam H.; Abed, Basim Sh.

doi:10.1088/1757-899x/901/1/012012

Cited by 6 publications

(4 citation statements)

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“…Namun kekurangannya yaitu belum menganalisis perubahan elevasi dasar sungai akibat sedimentasi tersebut. Penelitian yang dilakukan oleh Basim et al, (2020), pengendapan sedimen yang terjadi pada Sungai Al-Gharraf berkisar antara 2 -9 cm dengan debit sedimen antara 33 -970 ton/hari. Analisis terkait karakteristik aliran dan sedimentasi sangat diperlukan dalam merumuskan tindakan adaptasi dan mitigasi banjir.…”

Section: Pendahuluanunclassified

“…Persamaan yang digunakan dalam penelitian ini untuk menganalisis angkutan sedimen dan perubahan elevasi dasar sungai yaitu Meyer-Peter-Muller (MPM) dengan parameter partikel sedimen ukuran butiran yang seragam berkisar 0,3 mm sampai 30 mm, dan berat jenis sedimen antara 1,25 ton/m 3 sampai 4,0 ton/m 3 (Basim et al, 2020). Rumus Meyer-Peter-Muller (MPM) diperoleh secara empirik untuk memprediksi jumlah angkutan sedimen di sungai, karena rentang data yang digunakan sangat besar (Mananoma et al, 2022).…”

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Pemodelan Sedimentasi Menggunakan Hec-Ras 6.1 Untuk Menganalisis Perubahan Elevasi Dasar Sungai Tondano, Sulawesi Utara

Zainuddin

Irmanto

Nugroho

et al. 2023

JTH

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Sedimentation is a problem that can cause siltation and changes in river morphology due to reduced river capacity and increased runoff. The Tondano River is one of the major rivers that cross the City of Manado, which has a significant contribution in terms of the impact of flooding and, in its current conditions, has experienced considerable siltation so that the capacity of the river is unable to carry discharge. This study aims to analyze the changes in the elevation of the Tondano River bed that occurred within 6 years from 2016 to 2022 due to sedimentation. Sedimentation modelling is done using the HEC-RAS 6.1 application because, it has new features and improvements over the previous version, especially for, sediment transport analysis using the Meyer Peter Muller empirical equation. The bathymetric data used is the 2016 measurement, and a sediment model simulation is carried out for a 6-year daily discharge period. Then verification is carried out with the 2022 bathymetry data and current field conditions. The results show that the Tondano River on the Kairagi section, along 7.20 km from the estuary, experienced a significant change in riverbed elevation due to sedimentation. There was an average aggradation or sedimentation thickness of 0.891 m for 6 years and an estimated 0.130 to 0.140 m per year, so under these conditions, the cross-section of the Tondano River experienced siltation and reduced the capacity of the river to carry flood discharge. The simulation results showed that changes in river bed elevation also cause an increase in water level as high as 1 to. 2 m. From the simulation results of changes in the bottom of the Tondano River section of Kairagi, a total sedimentation amount of 83,087.49 m3 for 6 years was obtained.Keywords: sedimentation, river bed elevation, water surface elevation, aggradation, deposition ABSTRAKSedimentasi merupakan permasalahan yang dapat menyebabkan terjadinya pendangkalan dan perubahan morfologi sungai karena berkurangnya kapasitas sungai sehingga terjadi peningkatan aliran permukaan. Sungai Tondano adalah salah satu sungai besar yang melintas di Kota Manado yang menjadi salah satu sungai yang memiliki kontribusi besar dalam hal dampak banjir dan pada kondisi saat ini telah mengalami pendangkalan yang signifikan sehingga kapasitas sungai tidak mampu dalam mengalirkan debit. Tujuan penelitian ini yaitu untuk menganalisis perubahan elevasi dasar Sungai Tondano yang terjadi dalam kurun waktu 6 tahun dari tahun 2016 hingga 2022 akibat sedimentasi. Pemodelan sedimentasi dilakukan menggunakan aplikasi HEC-RAS 6.1 karena pada versi ini terdapat beberapa fitur baru dan perbaikan dari versi sebelumnya, yaitu persamaan angkutan sedimen menggunakan persamaan empiris Meyer Peter Muller. Data batimetri yang digunakan adalah pengukuran tahun 2016 dan dilakukan simulasi model sedimen selama periode debit harian 6 tahun kemudian dilakukan verifikasi dengan data batimetri tahun 2022 serta kondisi lapangan saat ini. Hasilnya dapat disimpulkan bahwa Sungai Tondano pada ruas Kairagi sepanjang 7,20 km dari muara mengalami perubahan elevasi dasar sungai yang cukup signifikan akibat sedimentasi. Terjadi agradasi atau tebal sedimentasi rata-rata sebesar 0,891 m selama 6 tahun dan diperkirakan sebesar 0,130 s.d 0,140 m per tahun, sehingga dengan kondisi tersebut penampang Sungai Tondano mengalami pendangkalan dan menyebabkan berkurangnya kapasitas sungai dalam mengalirkan debit banjir. Hasil simulasi perubahan elevasi dasar sungai tersebut juga menunjukkan terjadinya kenaikan elevasi muka air setinggi 1 s.d. 2 m. Dari hasil simulasi perubahan dasar Sungai Tondano ruas Kairagi diperoleh total besaran sedimentasi sebesar 83.087,49 m3 selama 6 tahun. Kata Kunci: sedimentasi, elevasi dasar sungai, elevasi muka air, agradasi, pengendapan

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Section: Pendahuluanunclassified

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Pemodelan Sedimentasi Menggunakan Hec-Ras 6.1 Untuk Menganalisis Perubahan Elevasi Dasar Sungai Tondano, Sulawesi Utara

Zainuddin

Irmanto

Nugroho

et al. 2023

JTH

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“…The Ministry of Energy and Water in Afghanistan and around the world is concerned about the sediment buildup in the Kabul River since it greatly impactshe river's capabilities and advantages [5]. And it is still one of the major global dangers to the ecosystems of rivers and reservoirs [6].…”

Section: Introductionmentioning

confidence: 99%

Sedimentation Analysis of Kabul River by Using Hec-ras

Raji

Turabi

Nasimi

2023

Preprint

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Rivers are the main and easily available source of water for various uses, and one of the main aims of river engineering is to control sedimentation and erosion. Due to strategic and environmental circumstances, the Kabul River is a well-known river in Afghanistan that attracts much interest for its water project design, existing reservoirs, and water supply to towns and industrial units. The Kabul river carries and delivers the highest sediment loads among the rivers of Afghanistan, and river sedimentation is a serious problem in Kabul city. The HEC-RAS (Hydrologic Engineering Centre River Analysis System) model is used to evaluate the hydrological parameters and sedimentation processes for variations in transverse and longitudinal profile, velocity and shear stress fluctuation, mass change, bed level change, total sediment, erosion, and deposition problems in a 40-KM section of the Kabul River in Kabul Province, from Pul-i-Surkh station of Maidan Province to Tangi-Gharo station of Kabul City. Some branch rivers and streams have joined from two sides along this river, which increases the sediment. More sedimentation is caused by population growth, nonstandard construction around the river, and the desire for a sanitation system in Kabul City. And also, having a low and variable slope in the middle length of this river causes more sediment problems. The study period for this research was from January 2016 to June 2020. A useful pattern of the conditions in Kabul City and the impacts of sediment transport, erosion, and sedimentation processes can be the output of this study.

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“…Furthermore, [22] used the HEC-RAS to study the same reach of the Tigris River in Baghdad that was investigated by [20], with the same geometric and flow data, to reevaluate the STC of this reach and predict the changes in the river bed for the period 2012-2017. Moreover, [23] used an HEC-RAS model to simulate the flow and predict the STC upper reach of the Al-Gharraf River, which has a length of 58.2 km, in Kut, Iraq. Also, [24] used the HEC-RAS software to study the STC of Diyala River, Iraq.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Model-Based Evaluation of Sediment Transport Capacity for the Makhool-Samarra Reach of Tigris River

Nama¹,

Abolghasemi²,

Maatooq³

2022

ETJ

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 Flow velocities within most of the M akhool-Samaraa Reach of the Tigris River are considered high compared to the local and worldwide flow velocity ranges.  Toffaleti sediment transport function with the Van Rijn fall velocity and the effective depthto-width computation methods are the most compatible and suitable methods for computing the Sediment Transport Potential (STP) in the M akhool-Samaraa Reach of the Tigris River.  The computed STPs in the M akhool-Samaraa Reach of the Tigris River are considered high on local and global scales, especially during high flow.  M edium gravel is the larger grain gradation class that can be transported. However, the suspended sediment is the dominant part of the Sediment Transport Capacity (STC), with a great majority of clay and very fine silt. This paper implemented an HEC-RAS-based steady two-dimensional hydrodynamic model to evaluate the hydraulic characteristics and Sediment Transport Capacity (STC) of the M akhool-Samarra Reach of the Tigris River, where this part is not already investigated. This model was prepared with the aid of topographical surveys, hydraulic measurements, and laboratory tests, as well as recorded data. The main findings show that the flow velocities within most of the studied reach are considered high compared to the local and worldwide flow velocity ranges in natural rivers. Also, the Toffaleti sediment transport function with the Van Rijn fall velocity and the effective depth-to-width computation methods are the most compatible and suitable methods for computing the Sediment Transport Potential (STP) in the studied reach.With the maximum flow, the computed STP was less than the average (5.7×10 6 tons/day) in 45% of the reach length, where the maximum STP is 8.7×10 6 tons/day. However, with the minimum flow, the STP intermittently fluctuates below the average (0.2×10 6 tons/day) in 48% of the reach length, where the minimum STP is 0.14×10 6 tons/day. Generally, these STPs are little more than the Tigris River in M osul and much higher than that in Baghdad. Also, these STPs are considered high on a global scale, especially during high flow. M edium gravel is the larger grain gradation class that can be transported. It constitutes less than 0.00005 % of the STP. Furthermore, the STC computations clearly show that the suspended sediment is the dominant part of the STC and the bed material constitutes less than 0.002% of the STC of the total load. However, most of the STC concerns the clay and very fine silt.

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Simulation of Sediment Transport in the Upper Reach of Al-Gharraf River

Cited by 6 publications

References 1 publication

Pemodelan Sedimentasi Menggunakan Hec-Ras 6.1 Untuk Menganalisis Perubahan Elevasi Dasar Sungai Tondano, Sulawesi Utara

Pemodelan Sedimentasi Menggunakan Hec-Ras 6.1 Untuk Menganalisis Perubahan Elevasi Dasar Sungai Tondano, Sulawesi Utara

Sedimentation Analysis of Kabul River by Using Hec-ras

Hydrodynamic Model-Based Evaluation of Sediment Transport Capacity for the Makhool-Samarra Reach of Tigris River

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