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Zandra Singal, Rachel
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ANALISIS KARAKTERISTIK SEDIMEN BERDASARKAN BUTIR SEDIMEN PADA KAWASAN SUNGAI SELOR ATAU SUNGAI BUAYA DI KABUPATEN BULUNGAN Singal, Rachel Zandra; Maharani, Larasati Nur
Civil Engineering Scientific Journal Vol 4, No 1 (2025): Civil Engineering Scientific Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/cesj.v4i1.6307

Abstract

ABSTRACT: Based on field observations, Sungai Buaya/Sungai Selor has a problem, namely sediment piles where the sediment piles are overgrown with water hyacinth and other aquatic plants, thus inhibiting the flow of river water. As a result, the river does not function properly. The formulation of the problem in this study is how are the characteristics of sediment grains in the waters of Sungai Selor/Sungai Buaya. The purpose of the study was to determine the size of sediment grains, the shape of sediment grains and the specific gravity of sediment grains in the waters of Sungai Selor/Sungai Buaya. The method used in this study was to take samples in the field by random sampling at 6 points in the location of Sungai Selor/Sungai Buaya. Sediment characteristic analysis was conducted in the laboratory, namely testing the size of sediment grains using the sieve analysis method in accordance with the ASTM D 422 standard, determining the shape of sediment grains using a microscope and testing the specific gravity of sediment based on SNI 1964: 2008. The results of the analysis showed that the type of sediment in the Selor River/Buaya River consisted of coarse sand with a grain size of 0.850 mm and medium sand with a size between 0.250 mm - 0.425 mm. The shape of sediment grains that dominate the waters of the Selor River or Buaya River is sub-angular with high sphericity, angular with medium sphericity; sub-rounded with medium sphericity; rounded with high sphericity; rounded with low sphericity. The specific gravity test that has been carried out obtained the results of the specific gravity of sediment in the Selor River/Buaya River between 2.128 - 2.609.Keywords: Sediment Characteristics, Sediment Grain Size, Sediment Form, Sediment Specific Gravity, Selor River/Buaya River. ABSTRAK: Berdasarkan pengamatan di lapangan bahwa Sungai Buaya/Sungai Selor memiliki permasalahan yaitu tumpukan sedimen dimana tumpukan sedimen itu ditumbuhi enceng gondok dan tanaman air lainnya,  sehingga menghambat aliran air sungai. Akibatnya sungai tidak berfungsi dengan baik. Rumusan masalah pada penelitian ini adalah bagaimana karakteristik butir sedimen pada perairan  Sungai Selor/Sungai Buaya. Tujuan penelitian adalah untuk mengetahui ukuran butir sedimen, bentuk butir sedimen dan berat jenis butir sedimen di perairan Sungai Selor/Sungai Buaya. Metode yang digunakan pada penelitian ini adalah dengan pengambilan sampel di lapangan dengan cara random sempling pada di 6 titik di lokasi Sungai Selor/Sungai Buaya. Analisa karakteristik sedimen dilakukan di laboratorium yaitu pengujian ukuran butir sedimen dengan menggunakan dengan metode analisa saringan yang sesuai dengan standar ASTM D 422, penentuan bentuk butir sedimen dilakukan menggunakan mikroskop dan pengujian berat jenis sedimen dilakukan berdasarkan SNI 1964 : 2008. Hasil analisa didapatkan jenis  sedimen di Sungai Selor/Sungai Buaya terdiri dari pasir kasar dengan ukuran butir 0,850 mm dan pasir sedang dengan ukuran antara 0,250 mm – 0,425 mm. Bentuk butir sedimen yang mendominasi perairan Sungai Selor atau Sungai Buaya adalah berbentuk menyudut tanggung dengan kebulatan tinggi (sub-angular with high sphericity berbentuk menyudut dengan kebulatan sedang (angular with medium sphericity); berbentuk membundar tanggung dengan kebulatan sedang (sub-rounded with medium sphericity); berbentuk membundar dengan kebulatan tinggi (rounded with high sphericity); berbentuk membundar dengan kebulatan rendah (rounded with low sphericity). Uji berat jenis yang telah dilakukan mendapatkan hasil berat jenis sedimen di Sungai Selor/Sungai Buaya antara 2.128 – 2,609.Kata kunci: Karakteristik Sedimen, Ukuran Butir Sedimen, Bentuk Sedimen, Berat Jenis Sedimen, Sungai Selor/Sungai Buaya
ANALISIS ANGKUTAN SEDIMEN DASAR (BED LOAD) PADA SUNGAI SELOR DI KECAMATAN TANJUNG SELOR KABUPATEN BULUNGAN Singal, Rachel Zandra; Nur, Mardhawiah
Civil Engineering Scientific Journal Vol 4, No 2 (2025): Civil Engineering Scientific Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/cesj.v4i2.6626

Abstract

ABSTRACT: Selor River is 6.7 km long, which passes through Buluh Perindu and Tanjung Rumbia areas in Kelurahan Tanjung Selor Hilir. The condition of Selor River is mostly sediment accumulation in several parts of the Selor River flow. The sedimentation problem that occurs continuously will cause shallowing which will affect the reduction in the flow capacity of the Selor River. The purpose of this study was to determine the bed load in the Selor River flow. Sediment data collection in the Selor River flow at four points using the purposive random sampling method. Sediment sampling at these four points was to fulfill the factors for sedimentation formation and to represent sediment conditions along the Selor River flow. Analysis of the large bed sediment load using the Mayer Petter Muller method using measurement data on one wet cross-section, average water depth, average speed, river bed slope and bed sediment grain diameter for bed sediment calculations. The sampling of bottom sediment was continued with sample testing at the Bina Marga DPUPR Kabupaten Bulungan laboratory, obtained data on sediment water content, sediment specific gravity and sieve analysis, resulting in a large bottom sediment grain diameter of D90 and from the sieve analysis it was produced that the diameter of grains passing sieve No. 4 (4,750 mm) was 98.4%; passing sieve No. 90 (0.175) was 23.33%. The results of the analysis of the large load of bottom sediment transport in the Selor River in the form of a bottom sediment discharge in a period of one day of 5.9616 Tons/day, a bottom sediment discharge in a period of one year of 2,175.984 Tons/year. Keywords: Bed Load Sediment, Sedimentation, Debit Sediment, Selor River, Mayer Petter Muller. ABSTRAK: Sungai Selor memiliki panjang 6,7 Km, yang melewati daerah Buluh Perindu dan Tanjung Rumbia wilayah Kelurahan Tanjung Selor Hilir. Kondisi Sungai Selor sebagian besar terjadi penumpukan sedimen pada beberapa bagian aliran Sungai Selor. Permasalahan sedimentasi yang terjadi tersebut secara terus menerus akan menyebabkan pendangkalan yang berpengaruh terhadap penurunan kapasitas aliran sungai Selor. Tujuan dari penelitian ini adalah untuk mengetahui debit sedimen dasar (bed load) pada aliran Sungai Selor. Pengambilan data sedimen di aliran Sungai Selor pada empat titik dengan metode pengambilan data adalah menggunakan metode purposive random sampling. Pengambilan sampel sedimen pada empat titik ini adalah untuk  memenuhi faktor- faktor terbentuknya sedimentasi dan dapat mewakili kondisi sedimen sepanjang aliran Sungai Selor. Analisis besar muatan sedimen dasar dengan mengunakan metode Mayer Petter Muller dengan menggunakan data ukur pada satu penampang basah, kedalaman air rata-rata, kecepatan rata-rata, kemiringan dasar sungai dan diameter butiran sedimen dasar (bed load) untuk perhitungan sedimen dasar (bed load). Pengambilan sampel sedimen dasar dilanjutkan dengan pengujian sampel di laboratorium Bina Marga DPUPR Kabupaten Bulungan diperoleh data kadar air sedimen, berat jenis sedimen dan analisa saringan, dihasilkan besar sedimen dasar diameter butiran D90 dan dari analisa saringan dihasilkan diameter butiran lolos saringan No.4 (4,750 mm) adalah 98,4% ; lolos saringan No.90 (0,175) adalah 23,33%. Hasil analisis besar muatan angkutan sedimen dasar pada sungai Selor berupa debit sedimen dasar dalam jangka waktu satu hari sebesar 5,9616 Ton/hari, debit sedimen dasar dalam jangka waktu satu tahun sebesar 2.175,984 Ton/tahun.Kata kunci: Sedimen Dasar, Sedimentasi, Debit Sedimen, Sungai Selor, Mayer Petter Muller.
Co-Authors Abdul, Kartini Maharani Darmawan, Rendy Andre Fuad Harwadi Hasrullah Hasrullah Imam Muazansyah, Imam Maharani, Larasati Nur NILA RUSYANTI Noptri Jumario Nur Azilz Jamal Nur, Mardhawiah Pangerang, Fitrah Pangerang Petronela Y. Wairissal Hermanus Ratna Dwi Christyanti, Ratna Dwi Rusyanti, Nila Yopi To'la Rombe Allo Yuliansyah Yuliansyah Yuliansyah Yuliansyah