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All Journal Jurnal Spektran Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Majalah Geografi Indonesia Jurnal Rekayasa Teknik Sipil dan Lingkungan Journal of Infrastructure Planning and Engineering
Yujana, Cokorda Agung
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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SIMULASI HUJAN-ALIRAN DAN ANALISIS NERACA AIR DI SUBAK PULAGAN TAMPAKSIRING GIANYAR BALI Haditama, I Gusti Ngurah Hesa Respati; Infantri Yekti, Mawiti; Yujana, Cokorda Agung
JURNAL SPEKTRAN Vol 12 No 2 (2024)
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRAN.2024.v12.i02.p03

Abstract

Subak Pulagan yang berada di Daerah Irigasi Pulagan Kumba ini telah ditetapkan oleh UNESCO menjadi Warisan Budaya Dunia (WBD). Subak Pulagan mendapatkan sumber air dari Bendung Pulagan yang terletak di Daerah Aliran Sungai (DAS) Pakerisan. Menurut Pekaseh Subak Pulagan, setiap tahunnya sebanyak 0,36% terjadi perubahan fungsi lahan pertanian yang diakibatkan dari penurunan kuantitas debit. Tujuan penelitian ini adalah untuk mengetahui ketersediaan air dengan dua metode hujan aliran yaitu F.J Mock dan metode Modifikasi Thornthwhite Mather dan kebutuhan air irigasi saat musim kemarau dan musim hujan di Subak Pulagan. Selanjutnya dapat ditinjau neraca air yang dihasilkan dari analisis tersebut. Verifikasi model hujan aliran dilakukan terhadap pengukuran debit nyata pada intake Bendung Pulagan dengan menggunakan metode uji kesamaan dua rata-rata. Hasil model hujan aliran memiliki trend hampir signifikan satu dengan lain. Hal ini dipengaruhi oleh kondisi hidroklimatologi DAS Tukad Pakerisan. Saat dibandingkan dengan data debit intake Bendung Pulagan yang memiliki grafik relatif konstan dalam periode tertentu, maka dapat dikatakan kedua model hujan aliran dapat mewakili kondisi ketersediaan air pada Bendung Pulagan. Berdasarkan neraca air antara debit intake Q80 Bendung Pulagan dengan Kebutuhan Air Irigasi didapatkan hasil surplus air untuk setiap periode. Selanjutnya uji verifikasi model menggunakan uji kesamaan dua rata-rata dari tahun 2014 hingga tahun 2017, dan mendapatkan nilai t Hitung (tH) masing-masing sebesar -0,14; -0,19; 0,138; 0,108; -0,88; -1,301; -0,671 dan -0,84. Nilai tersebut dapat diterima ke dalam grafik daerah penerimaan model dengan persamaan , sehingga dapat disimpulkan bahwa kedua model hujan aliran ini dapat diaplikasikan pada DAS Tukad Pakerisan
Analisis statistik kinerja dan koreksi kesalahan data curah hujan berbasis satelit di Provinsi Bali Aryastana, Putu; Yujana, Cokorda Agung; Candrayana, Kadek Windy; Subiyanto, Krisna Himawan
Majalah Geografi Indonesia Vol 39, No 1 (2025): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/mgi.99971

Abstract

Abstrak.Data curah hujan yang akurat, reliabel, dan mendekati waktu nyata adalah faktor penting dalam analisis peramalan dan mitigasi bencara alam hidro klimatologi (banjir, tanah longsor, topan, dan curah hujan ekstrim), pemodelan hidrologi, prakiraan cuaca, perencanaan pertanian, manajemen ekologi, dan manajemen sumber daya air. Observasi curah hujan stasiun menghadapi kendala di Provinsi Bali, terutama pengukuran jarang ditemui di daerah terpencil dan pegunungan. Oleh karena itu, perlu mencari sumber data hujan yang dapat diandalkan seperti produk hujan berbasis satelit, yang menyediakan data dalam waktu mendekati waktu nyata (near real-time), deretan waktu hujan yang tidak terputus dengan resolusi spasial tinggi. Penelitian ini mengevaluasi kinerja produk hujan satelit global yang mendekati waktu nyata dengan 43 stasiun di Provinsi Bali. Produk curah hujan satelit yang dianalisis adalah Integrated Multi-satellitE Retrievals for Global Precipitation Measurement-Early Run (IMERG-ER) dan The Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks - Dynamic Infrared Rain Rate near real-time (PDIR-Now). Selanjutnya, kedua data curah hujan berbasis satelit tersebut dikoreksi menggunakan tiga pendekatan, yaitu koreksi rasio bias, koreksi rata-rata deviasi, dan koreksi nilai fungsi distribusi probabilitas. Metode tradisional berbasis titik ke piksel bersama dengan pengukuran statistik kontinu, metrik kategoris, serta indeks volumetrik diimplementasikan untuk mengevaluasi kinerja produk satelit. Studi ini menunjukkan bahwa meskipun kedua dataset memiliki kelebihan masing-masing, IMERG-ER cenderung lebih konsisten dan andal dalam berbagai kondisi dibandingkan PDIR-Now, terutama setelah koreksi dilakukan. Koreksi nilai fungsi distribusi probabilitas menunjukkan peningkatan kinerja paling signifikan dibandingkan dengan metode koreksi yang lainnya. Hasil studi ini juga mempertegas bahwa koreksi kesalahan perlu dilakukan sebelum data curah hujan berbasis satelit diaplikasikan dan berbagai bidang.Abstract. Accurate, reliable, and near-real-time rainfall data are critical factors for forecasting and mitigating hydro-meteorological natural disasters (such as floods, landslides, typhoons, and extreme rainfall), hydrological modeling, weather forecasting, agricultural planning, ecological management, and water resource management. Rainfall observations from station measurements face challenges in Bali Province, particularly due to the scarcity of measurements in remote and mountainous areas. Therefore, it is necessary to seek reliable sources of rainfall data, such as satellite-based rainfall products, which provide near real-time data, uninterrupted rainfall time series, and high spatial resolution. This research evaluates the performance of global near real-time satellite rainfall products with data from 43 stations across Bali Province. The satellite rainfall products analyzed include the Integrated Multi-satellite Retrievals for Global Precipitation Measurement-Early Run (IMERG-ER) and the Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks - Dynamic Infrared Rain Rate near real-time (PDIR-Now). Subsequently, the satellite-based rainfall data were corrected using three approaches: bias ratio correction, mean deviation correction, and probability distribution function value correction. Traditional point-to-pixel methods, along with continuous statistical measurements, categorical metrics, and volumetric indices, were implemented to evaluate the performance of satellite products. The study reveals that although both datasets have their respective strengths, IMERG tends to be more consistent and reliable under various conditions compared to PERSIANN, especially after corrections are applied. The probability distribution function value correction demonstrated the most significant performance improvement compared to the other correction methods. The findings of this study also emphasize the necessity of error correction before satellite-based rainfall data is applied across various fields. Submitted: 2024-09-14 Revisions:  2025-03-06 Accepted: 2024-09-11 Published: 2025-03-14
Analisis sisa umur rencana Jalan Baturinggit di wilayah Kubu Karangasem akibat adanya beban berlebih Desa, Kadek Yoga Praba; Sumanjaya, Anak Agung Gede; Yujana, Cokorda Agung
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa 204-210
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.13.2.10280.204-210

Abstract

Baturinggit Road is one of the main routes for shipping goods/materials involving overloaded vehicles. The more vehicles that pass, the greater the load that passes through the road, resulting in road damage. The purpose of this study was to analyze the remaining life of the road design caused by overloaded vehicles. The study was conducted for 3 days, starting from April 15, 2024 - April 17, 2024 at 08.00 WITA - 18.00 WITA on the Baturinggit Road section, Kubu District, Karangasem Regency, Bali Province. Based on the results of the study, it is known that the cumulative Vehicle Damage Factor (VDF) of normal loads during the 10-year Remaining Life (RL) is 10,658,570 ESAL while the cumulative VDF of excess loads during the 10-year RL is 28,727,670 ESAL. Based on calculations using the AASHTO 1993 method, the magnitude of the RL decrease that occurred was 291%, meaning that there was a decrease in RL of 7.45 years so that the percentage of cumulative VDF increase due to overloading was 169.53%. The percentage of vehicles with overloading that caused damage on the Baturinggit Road section included pickup trucks of 30%, light trucks of 59.80%, medium trucks of 119.52%, heavy trucks of 10% and 1.2-2 trailer trucks of 19.08%. The conclusion from the calculation results of the AASHTO 1993 method was a decrease in RL of 291% or equivalent to a loss of road life of 7.45 years from the initial design life. The impact of overloading on medium trucks is the focus of attention because of its very significant contribution to road damage.
ANALYSIS OF CONTROL BEHAVIOUR OF ARCH ON THROUGH ARCH BRIDGE CONSTRUCTION Wijaya, Krisna Putra; Dang, Thanh Trung; Yujana, Cokorda Agung; Aditama, I Putu Deny Surastika; Sanjaya, I Gede Dhana Putra
Journal of Infrastructure Planning and Engineering 35-40
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.3.2.2024.35-40

Abstract

Bridges are structures that need to be well-planned to function optimally. Bridges come in various shapes and sizes, one of them is an arch bridge. Through this thesis preparation the author tried to plan the upper structure of a bridge with an arch type on Tukad Ayung Bridge. The initial planning data includes a length of the existing bridge of 64 m and a width of 15 m. The planning method using LRFD and SAP2000 for the software. The arch rib dimensions in the planning of the through arch steel bridge on Tukad Ayung is 900.600.30.40 box profile with a cross-sectional height. It is using steel material of special type of structural steel for bridges with ASTM A 709 grade 50 specifications. From the analysis result, the stress melting point is fy= 345 MPa and the modulus of elasticity steel is E= 200000 MPa. The cross-sectional height is 900 mm, cross-sectional width is 600 mm, the body thickness (tw) is 30 mm and the wing thickness (tf) is 40 mm.
ANALYSIS OF WOODEN RESIDENTIAL HOUSE STRUCTURE AGAINST EARTHQUAKE LOAD Arta, I Ketut Agus Asih Adi; Sulistiana, Putu Didik; Yujana, Cokorda Agung; Jawat, I Wayan
Journal of Infrastructure Planning and Engineering 57-62
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.3.2.2024.57-62

Abstract

Wood material is a construction material that has its own appeal from an aesthetic and architectural point of view, however wood material has various limitations, namely in terms of durability and structural strength when compared to structural materials such as concrete and steel. This research examines the structural behavior of residential houses using glulam wood materials using program analysis software ETABS.  From the results of initial design calculations, the dimensions of the structural elements were obtained, namely beams measuring 25 cm x 40 cm and columns measuring 30 cm x 30 cm. Based on the results of the analysis that has been carried out, it shows that the house structure has met earthquake resistance requirements with maximum inter-story drift of 24.35 mm (below the 26.92 mm limit). The dynamic analysis shows successful mass participation with total mass participation ratios exceeding 90% in all primary directions: 99.11% for translational motion in X-direction (UX), 99.29% for translational motion in Y-direction (UY), and 99.51% for rotational motion about vertical axis (RZ). These results indicate that the structural model adequately captures both lateral and torsional responses of the building under seismic loading.
PERENCANAAN ULANG SUPER STRUKTUR DENGAN STRUKTUR FLAT SLAB PADA GEDUNG TOKO DAN GUDANG JALAN RAYA PURA DEMAK DENPASAR BALI KAMA GUNA, DEWA GEDE ARI KAMA GUNA; Sarassantika, I Putu Ellsa; Yujana, Cokorda Agung
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.6102

Abstract

This study was conducted to analyze the performance of multi-story building structures using a flat slab system with drop panels, both in single and adjacent configurations. The research was motivated by Indonesia’s high seismic activity and the growing need for efficient and easily constructed structural systems that also provide aesthetic benefits. The main objective was to evaluate and compare the lateral displacement behavior of both structural models and assess their compliance with the drift limits specified in SNI 1726:2019. The analysis was performed through numerical modeling using ETABS software, with load combinations following SNI 1727:2020 for minimum design loads and SNI 2847:2019 for reinforced concrete strength provisions. The structural models consisted of a 200 mm thick flat slab and a 300 mm thick drop panel, supported by beams and columns designed to meet flexural and shear capacity requirements. The analysis results indicated that the maximum displacement was 34.584 mm in the X direction and 12.832 mm in the Y direction, both within the allowable drift limits. The adjacent building model exhibited average lateral displacements 1.25 times smaller in the X direction and 3.75 times smaller in the Y direction compared to the single structure, indicating a stiffness improvement due to inter-building interaction. All structural components, including the 7.6-meter-deep pile foundation, satisfied the strength and stability criteria. It was concluded that the flat slab system with drop panels is structurally efficient and seismically safe, providing a reliable alternative for building design in earthquake-prone regions.
Co-Authors Aditama, I Putu Deny Surastika Arta, I Ketut Agus Asih Adi Candrayana, Kadek Windy Dang, Thanh Trung Desa, Kadek Yoga Praba Haditama, I Gusti Ngurah Hesa Respati I Putu Ellsa Sarassantika I Wayan Jawat KAMA GUNA, DEWA GEDE ARI KAMA GUNA Mawiti Infantri Yekti Putu Aryastana Sanjaya, I Gede Dhana Putra Subiyanto, Krisna Himawan Sulistiana, Putu Didik Sumanjaya, Anak Agung Gede Wijaya, Krisna Putra