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Teknik Sipil Universitas Sriwijaya
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ANALISIS KESEIMBANGAN AIR PADA EMBUNG UNIVERSITAS SRIWIJAYA Haki, Helmi; Sarino, Sarino; Ramadhan, Muhammad Anindya
CANTILEVER Vol 6, No 1 (2017): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

Analisis keseimbangan air dilakukan pada embung Universitas Sriwijaya untuk mengetahui keseimbangan air ketika dilengkapi dengan spillway pada saluran outflow. Analisis yang dilakukan meliputi analisis debit air yang masuk ke dalam embung, analisis pengisian embung, analisis debit banjir rencana, dan analisis tinggi muka air di atas spillway. Untuk debit air yang keluar dari saluran outflow, jika elevasi tinggi muka air melebihi spillway maka terjadi debit outflow. Debit air yang masuk ke dalam embung hanya bersumber dari saluran inflow yang terdapat pada embung, sedangkan debit air masuk dari Sungai Kelekar tidak diperhitungkan. Perhitungan volume untuk kebutuhan air tidak termasuk dalam variabel yang mempengaruhi keseimbangan air pada embung. Sedangkan debit banjir rencana yang digunakan adalah periode ulang 50 tahun. Data yang digunakan meliputi data profil embung, catchment area embung, data curah hujan, data klimatologi, dan data infiltrasi. Berdasarkan hasil analisis pengisian embung didapatkan nilai debit air rata-rata yang mengisi embung yaitu 343.859,14 m3/bulan. Nilai ΔS terbesar terjadi pada Bulan Desember dengan nilai 686.610 m3/bulan, sedangkan Nilai ΔS terendah terjadi pada Bulan Juli dengan nilai 2.829,6 m3/bulan. Berdasarkan analisis Debit banjir dengan periode ulang 50 tahun, didapatkan total debit banjir periode ulang 50 tahun dari saluran inflow yang masuk ke dalam embung Universitas Sriwijaya adalah sebesar 44,11 m3/det. Berdasarkan hasil analisis ketinggian muka air di atas spillway saat terjadi banjir periode ulang 50 tahun didapatkan ketinggian muka air di atas spillway sebesar 1,71 meter, Sehingga ketinggian dari dasar spillway hingga muka air adalah sebesar 3,71 meter < 5,5 meter. Maka tidak terjadi luapan atau banjir dari dalam embung Universitas Sriwijaya. Berdasarkan hasil analisis keseimbangan air pada embung Universitas Sriwijaya didapatkan kesimpulan bahwa jika embung tersebut dilengkapi dengan bangunan pelimpah (spillway) maka tidak akan terjadi kekeringan pada embung, hal ini dapat diketahui dari hasil analisis pengisian embung yang menunjukan bahwa tidak terjadi nilai 0 atau minus pada nilai debit air yang tersedia pada embung (ΔS).
PENGARUH INTENSITAS HUJAN DAN PENUTUP LAHAN (LAND COVER) TERHADAP NILAI KOEFISIEN ALIRAN PERMUKAAN (C) MENGGUNAKAN RAINFALL SIMULATOR Akara, Rado; Sarino, Sarino; Yuono, Agus Lestari
CANTILEVER Vol 5, No 1 (2016): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

The influence of land cover and intensity is one of the factors that influence the value of surface flow coefficient (C). The coefficient value will affect the surface flow occurs during peak discharge. In this research, calculate surface coefficient (C) with variation intensity 40 mm/h, 50 mm/h, 60 mm/h, 70 mm/h for land cover paving block (brick pattern and matting pattern), grass block , mini elephant grass, sand and concrete pavement. This test is expected to be the solution in choosing the right type of land cover as a substitute for concrete pavement in the parking lot, park, or home or office yard. The implementation methodology was carried out by laboratory testing with rainfall simulator, 4 cm high base layer of sand and various land cover around 4 cm. The test that carried out in this study include filter analysis, rain intensity and surface coefficient value (C) testing. Testing value of coefficient including the test using rational formulas and testing by definition (Scwab, 1981 and Mc Guen, 1989). The result of this research obtained coefficient of land cover paving block pattern of stacking brick 0,857-0,891, in land cover paving block matting pattern 0,825-0,856, while at grass block 0,677-0,765. The coefficient of surface flow (C) for concrete pavement cover is 0.961-0,997, mini elephant grass cover is 0,483-0,538, while without land cover is 0,559-0,639. The value of surface flow coefficient (C) is getting bigger with increased rain intensity and land cover that has fewer gaps, in this case there is a significant difference in the paving block and grass block.
PENGARUH VARIASI KEMIRINGAN DAN PENUTUP LAHAN (LAND COVER) TERHADAP DEBIT ALIRAN PERMUKAAN MENGGUNAKAN RAINFALL SIMULATOR Khairunnisa, Audrey Vinny; Yuono, Agus Lestari; Sarino, Sarino
CANTILEVER Vol 6, No 1 (2017): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

The increment of urban infrastructure development causes the green land as a catchment area changes into watertight land cover, so the surface runoff increases. When the surface runoff more than the infiltration, its causes floods. One of the solutions is reduce the quantity of watertight land by using the eco-friendly land cover. Besides land cover, land slope is one of the factors affecting amount of surface flow. Therefore, this study was conducted to determine the effect of land cover use and slope relation to surface flow discharge with rain intensity 70 mm / hour. This research was conducted in laboratory using rainfall simulator with area 2 x 1 m and slope variation 0%, 1%, 2%, 3%. Types of land cover used in this research are paving block (stretcher and basketwave pattern), grass block, grass (Pennisetum purpureum schamach), concrete pavement and sand (as land without cover). The results of this study indicate the use of concrete pavement to produce surface flow discharge value ranged from 2.66 to 3.22 liters / minute, paving block of stretcherbond ranged from 2.43 to 3.0 liters / minute, paving block basketwave ranged from 2.17 to 2.72 liters / minute, grass block ranged from 1.99 to 2.59 liters / minute. Grass produced surface flow discharge ranging from 1.40 to 2.12 liters / minute and sand as land without cover ranged from 1.48 to 2.29 liters / minute. The land slope variation is very influential on the amount of surface runoff discharge. The steeper land, make the surface runoff discharge increase.
SIMULASI KARAKTERISTIK GENANGAN BANJIR MENGGUNAKAN HEC-RAS 5 (STUDI KASUS SUBSISTEM SEKANAK DI KOTA PALEMBANG) Al Amin, M. Baitullah; Ulfah, Luthfiyyah; Haki, Helmi; Sarino, Sarino
CANTILEVER Vol 7, No 2 (2018): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

This paper deals with the modelling and simulation of flood inundation characteristics i.e. boundaries, depths, and velocities within Sekanak Subsystem which is one of flood-prone areas in Palembang City, Indonesia. The area of subsystem being studied was about 11 km2 . The new hydrodynamic model, HEC-RAS 5.0 was used to simulate the flood flow regimes by integrating the one-dimensional and two-dimensional model, known as combined 1D/2D flow model. The geometry of drainage channel was used as 1D domain to simulate the flow routing along the channel based on certain boundary conditions i.e. 25-yrs flood discharge and tide level both in upstream and downstream. The 2D domain in the model was the geometry of area beside the channel. The flow of 1D and 2D domain were connected by lateral weir, so the water which overflowing from the channel could be routed within 2D areas. The result shows that the area of inundation during lowest tide level is about 3.43 km2 with the velocities and depths range between 0 – 1.18 m/s and 0 – 3.08 m respectively. Furthermore, for average tide level, the area of inundation increases to 3.54 km with the velocities and depths range between 0 – 1.30 m/s and 0 – 3.11 m respectively. The maximum potential of inundation during the highest tide level is about 4.46 km2 with the velocities and depths respectively range between 0 – 2.64 m/s and 0 – 3.40 m. Therefore, it can be concluded that almost half of subsystem area potentially being inundated (40.11%), so it requires appropriate flood control and management to reduce the risk.
ANALISIS TRUK PENGANGKUT SAMPAH DI WILAYAH SEBERANG ULU KOTA PALEMBANG Sarino, Sarino; Putri, Nyimas Septi Rika; Astuti, Dewi
CANTILEVER Vol 6, No 2 (2017): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

Sistem pengangkutan sampah berhubungan dengan biaya dalam pengelolaannya. Semakin jauh rute pelayanan dan semakin banyak jumlah ritasi truk maka semakin besar pula biaya operasional yang harus dikeluarkan. Dari pengamatan yang telah dilakukan, TPS-TPS di wilayah Seberang Ulu kota Palembang berjarak cukup jauh dari TPA Sukawinatan. Hal ini mempengaruhi waktu pengangkutan dan biaya angkut sampah. Sistem pengangkutan sampah di wilayah Seberang Ulu Kota Palembang menggunakan Hauled Container System (HCS) dan Stationary Container System (SCS). Hasil analisis aktivitas pengangkutan sampah didapatkan waktu rata-rata untuk pengangkutan dalam satu kali ritasi perhari dengan armroll truck adalah 2,88 jam/hari dan jumlah ritasi rata-rata per hari adalah sebanyak 2,28 ritasi/hari dan armroll truck dengan nomor lambung 81 merupakan armroll truck dengan biaya angkut sampah/m3/hari yang paling mahal yaitu sebesar Rp 15.147,2, sedangkan dengan dump truck didapatkan waktu rata-rata untuk pengangkutan dalam satu kali ritasi perhari adalah 4,77 jam/hari, dan jumlah ritasi rata-rata per hari adalah sebanyak 1,475 ritasi/hari, dan dump truck dengan nomor lambung 71 merupakan dump truck dengan biaya angkut sampah/m3/hari yang paling mahal yaitu sebesar Rp 37.281,8. Dari hasil analisis dapat dilihat bahwa nilai efektifitas yang lebih besar adalah sistem HCS dan biaya angkut sampah menggunakan armroll truck lebih murah dibandingkan dengan dump truck.
Co-Authors Agus Lestari Yuono Akara, Rado alfiah alfiah Anang Setyo Budi Antoko, Noto Apandi, Apandi Astuti, Dewi Aswanti, Wiwik Budi Hastuti Choirunnisa, Lutfia Fajar Damono, Hari Darmawan Darmawan Dinar DA Putranto Dinar Dwi Anugerah P fatimah Fatimah Haerul, Haerul Haki, Helmi Haki, Helmi Indrayana, Mohamat Jiří Hájek Khairunnisa, Audrey Vinny Kirna, Mefi Kurnianingsih Kurnianingsih, Kurnianingsih Lars Hendrich M. Baitullah Al Amin, M. Baitullah Mei Ahyanti Michael Balke Mulyadi Mulyadi Nana Supriatna Nano Suprayitno NOVA MUJIONO Nurhaman, Ujang Prihandini, Riena Priyatna, Yayat Purdiyanto, Heru Putri, Nyimas Septi Rika Rachmatiyah, Rina Raden Pramesa Narakusumo Ramadhan, Muhammad Anindya Ratna Dewi Santoso, Pramono Hery Sauri, Sopian Sofyani, Umar Suparno Suparno Trilaksono, Wahyu Ulfah, Luthfiyyah Usna Fahliza Wahyudin, Mohamad Wikanta, Hadi