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All Journal Journal of Civil Engineering Jurnal Aplikasi Teknik Sipil
Wasis Wardoyo
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Civil Engineering, Building, Construction & Architecture

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THE EFFECTIVENESS NUMBER OF BAFFLE BLOCKS TO REDUCE ENERGY IN TUKUTAHA TRANSITION CHANNELS Agustina Nababan; Nadjadji Anwar; Wasis Wardoyo
Journal of Civil Engineering Vol 36, No 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v36i2.9428

Abstract

One of the causes of damage to the weir structure is scouring. Scouring may occur along the weir channel. Scouring occurs due to the high flow velocity and high specific energy. One of the methods used to reduce specific velocity and energy is by installing baffle blocks in parts that have high-velocity and energy. The addition of baffle blocks is carried out at a place that has a high-velocity, namely the transition channel. To see the effect of baffle block variation on velocity and energy, a study was conducted. The study was conducted with four baffle block type models. The type 0 model is a baffle block installation pattern based on the initial design. Type 1 model is designed based on the planning of The Colorado State University (CSU) rigid boundary basin. Type 2 model is designed by reducing the number of baffle blocks from the initial design of 102 baffles to as many as 75 baffles. while the 3 channel type model transitions without baffle blocks. Based on the analysis of % energy loss in the transition channel, the type 0 model produces the largest energy loss. The type 0 model at maximum discharge has a % energy loss 10.821% greater than the type 1 model, 14.889% greater than the type 2 model and 33.02 % greater than the type 3 model.
Strategi Pemeliharaan Jaringan Irigasi Daerah Irigasi Blimbing Roni Sigit Wibowo; Wasis Wardoyo; Edijatno Edijatno
Jurnal Aplikasi Teknik Sipil Vol 16, No 1 (2018)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.645 KB) | DOI: 10.12962/j2579-891X.v16i1.2793

Abstract

Daerah Irigasi (DI) Blimbing mengairi lahan pertanian sebesar 319 Ha. Kondisi fisikjaringan irigasi banyak mengalami kerusakan yang mengakibatkan menurunnya fungsijaringan irigasi. Sehingga diperlukan pemeliharaan untuk mengembalikan fungsi jaringanirigasi ke kondisi semula. Tujuan dari penelitian ini adalah untuk memperoleh strategipemeliharaan jaringan irigasi DI Blimbing yang optimal, dengan memperhatikan biaya.Tahap awal adalah mengidentifikasi, menilai kondisi fisik dan fungsi bangunan irigasi danmembuat urutan prioritas pemeliharaan jaringan irigasi. Kemudian menghitung Benefitand Cost untuk menilai kelayakan. Penelitian ini menggunakan Metode Linier Programmingyang terdiri dari fungsi tujuan dan kendala. Sebagai fungsi tujuan adalahmemaksimumkan nilai prioritas/nilai manfaat, sedangkan untuk fungsi kendala yaituketerbatasan biaya. Mengacu biaya sebesar Rp. 100.000.000, permodelan/optimasipemeliharaan yang dikaitkan untuk memaksimalkan nilai prioritas atau nilai manfaatdiperoleh ruas yang dapat diperbaiki sebanyak 7 ruas dengan anggaran sebesar Rp.99.998.877. Hasil optimasi dengan memaksimalkan nilai prioritas sama dengan hasiloptimasi dengan memaksimalkan nilai manfaat.
SEEPAGE MODELING IN EMBANKMENT DAMS WITH VARIOUS SUB SOIL CHARACTERISTICS Almaretha Mevia Azizah Putri Iswanto; Wasis Wardoyo; Trihanyndio Rendy Satrya
Journal of Civil Engineering Vol 37, No 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.12431

Abstract

The embankment dam has the advantage that it can be built in all sub-base conditions although poor topography, but the weakness is seepage, so research on seepage is needed. This study uses numerical modelling with the GeoStudio program: SEEP/W and SLOPE/W. The data used is data from the Tugu Dam, Trenggalek, while the subbase data used five soil types, namely clay, silty clay, silt, silty sand, and sand. This research simulation is divided into two; the first simulation is the condition of the soil characteristics remains with the water level increasing every 5 meters from the base elevation of the dam to below the floodwater level;. In contrast, the second simulation is the condition of the water level elevation remains constant, but the soil characteristics change. Each simulation will be checked for seepage discharge and soil stability. The first simulation results show that seepage discharge and water level elevation have a logarithmic correlation with R2 > 0.75. The largest seepage discharge of 1,90 x 10-3 m3/s is sand soil, while the smallest is clay soil of 1,47 x 10-9 m3/s. The results of the second simulation show that the seepage discharge and saturated volumetric water content also have a logarithmic correlation, but some results cannot be used because they have an R2 value < 0.75. From the two simulations, the seepage discharge that occurs is said to be safe because it is below the average annual runoff which is 1% of the 10-year re-flood discharge calculated using the Nakayasu Synthetic Unit Hydrograph (HSS) which is 5.99 m3/s, and the safety factor of slope stability is > 1.2 then the dam is considered stable.
Analisis Pengaruh Kedalaman Saluran Pengarah Aliran Pada Pelimpah (Spillway) Dengan Pemodelan Numerik Reszha Pahlavi Ali; Wasis Wardoyo; Mahendra Andiek Maulana
Jurnal Aplikasi Teknik Sipil Vol 20, No 3 (2022)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1809.67 KB) | DOI: 10.12962/j2579-891X.v20i3.13349

Abstract

Desain pelimpah samping berpotensi menimbulkan aliran helicoidal. Aliran tersebut berpotensi meningkatkan beban hidrodinamis pada struktur pelimpah. Untuk mencegah hal tersebut maka saluran pengarah aliran harus didesain kecepatan alirannya maksimal 4 meter/detik. Pemodelan numerik dilakukan dengan program OpenFOAM. Data yang dibutuhkan yaitu dimensi, debit, dan tinggi muka air penelitian sebelumnya. Penelitian ini bertujuan untuk memperoleh parameter sensitivitas model, menganalisis model numerik terhadap model eksperimen berdasarkan profil muka air, menganalisis hubungan antara rasio kedalaman bendungan dan kedalaman saluran pengarah aliran terhadap parameter hidraulikanya. Didapatkan hasil bahwa model numerik dengan OpenFOAM memiliki performa yang baik. Hal tersebut ditunjukkan oleh rata-rata nilai RMSE untuk setiap simulasi yaitu 0,996 dan nilai koefisien NASH yaitu 0,074. Parameter yang paling sensitif yaitu kerapatan mesh. Rasio (H/P) berpengaruh terhadap profil muka air diatas mercu. Semakin kecil rasio (H/P) maka, semakin besar penurunan muka air yang terjadi. Semakin besar rasio (H/P) maka semakin kecil penurunan muka air yang terjadi.
Co-Authors Agustina Nababan Almaretha Mevia Azizah Putri Iswanto Edijatno Edijatno Mahendra Andiek Maulana Nadjadji Anwar Reszha Pahlavi Ali Roni Sigit Wibowo Trihanyndio Rendy Satrya