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All Journal IJEMS (Indonesian Journal of Environmental Management and Sustainability) Sains Natural: Journal of Biology and Chemistry Jurnal Ilmiah Rekayasa Sipil JURNAL REKAYASA Pelita Eksakta SIGMA TEKNIKA Civil Engineering For Community Development Perbal: Jurnal Pertanian Berkelanjutan
Edwina Zainal
Universitas Bung Hatta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Public Health Transportation Other

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Journal : SIGMA TEKNIKA

 1 
PENDUGAAN DEBIT PUNCAK PADA SUB-DAS KURANJI Edwina Zainal; Zufrimar Zufrimar; Hendri Warman; Nori Yusri
SIGMA TEKNIKA Vol 6, No 1 (2023): SIGMATEKNIKA, VOL. 6, N0. 1, JUNI 2023
Publisher : Fakultas Teknik, Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/sigmateknika.v6i1.5048

Abstract

Penelitian ini bertujuan untuk menggambarkan peta sub-DAS Kuranji dengan menganalisa data DEMNAS pada perangkat Arc GIS, mendeskripsikan karakteristik curah hujan dan debit puncak dengan metode Rational pada setiap sub DAS. Hasil penelitian adalah pada DAS Kuranji terdapat 10 (sepuluh) sub DAS Kuranji, yaitu sub DAS Batang Padang Karuah, Batang Padang Janiah Hulu, Batang Padang Janiah, Batang Limau Manis, Batang Kuranji, Batang Sapih, Batang Aie Lareh, Batang Malvinas, Ulak Karang Utara dan Air Tawar. Sub DAS Padang Karuah merupakan sub DAS terluas pada DAS Kuranji, yaitu 47.88 km2, sedangkan sub DAS Malvinas merupakan sub DAS terkecil, yatitu 3.91 km2. Berdasarkan peta hasil penelitian, sungai Batang Balimbing, Batang Lurus dan Batang Maransi melewati Sub BAS Batang Aie Lareh dan memberikan kontribusi debit ekstrem pada kawasan DAS Kuranji tersebut.
PERBANDINGAN ELEVASI DASAR SUNGAI BERDASARKAN HASIL ANALISIS PADA DEM DRONE, DEMNAS dan DEM SRTM Zufrimar, Zufrimar; Zainal, Edwina
SIGMA TEKNIKA Vol 6, No 2 (2023): SIGMATEKNIKA, VOL. 6, N0. 2, November 2023
Publisher : Fakultas Teknik, Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/sigmateknika.v6i2.5704

Abstract

Digital elevation models (DEMs) are essential to accurately predict river cross-section in the watershed. Technological developments of unmanned aerial vehicles (UAVs) or drone has received a lot of attention in various research field to get the latest information from the area, because of its mobility, high resolution, and low cost, so it can be a competitive alternative to produce maps with precise georeferences. However, this has not been tested so far. In this study, We evaluated the accuracy of the DEMs generated from UAV imagery by comparing it to DEMNAS, DEM SRTM, and direct topographic measurements. We performed regression analysis on the river bed elevation of the Kuranji River Padang, where the river bed elevation is the result of the analysis of each DEM. The result found that for river bed elevation of the DEM Drone performed competitively to DEMNAS with the correlation test value (r) were 0,992 and 0.954, respectively. The result of the DEM SRTM analysis has a wider range of data variations than the DEM Drone and DEMNAS.
STRUCTURAL REVIEW OF HORIZONTALLY IRREGULAR BUILDINGS USING PUSHOVER AND TIME HISTORY ANALYSIS RM, Redha Arima; Zainal, Edwina; Khaidir, Indra
SIGMA TEKNIKA Vol 8, No 2 (2025): SIGMATEKNIKA, VOL. 8, N0. 2, NOVEMBER 2025
Publisher : Fakultas Teknik, Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/sigmateknika.v8i2.8358

Abstract

Padang City, the capital of West Sumatra, is one of the earthquake-prone regions in Indonesia due to its location between two of the world's active tectonic plates. In earthquake-resistant buildings, the geometry of the structural layout plays a crucial role in how the building responds to seismic forces. Regular, simple, and symmetrical structures tend to perform better during earthquakes compared to irregular ones. The purpose of the research is to evaluate the building's structural capacity under seismic loads, including identifying potential failure mechanisms. The analysis was carried out using the nonlinear pushover method with ETABS software to perform a performance-based design evaluation. The output parameters and structural performance assessment were based on the standards of the Applied Technology Council ATC-40, FEMA 356, and FEMA 440 guidelines. Based on the results, the maximum shear force the structure can withstand is 18,344.6041 kN with a displacement of 291.435 mm under Push-X, and 18,611.7226 kN with a displacement of 190.459 mm under Push-Y. These displacement values remain below the allowable limit of 2% of the building height (H), which is 442 mm. The analysis also revealed a maximum total drift of 0.013 in the X-direction and 0.010 in the Y-direction, while the maximum inelastic drift was 0.011 in the X-direction and 0.006 in the Y-direction. According to Drift Limitation performance parameters, the structure falls under the Damage Control (DC) performance level. Further nonlinear Time History analysis using different earthquake records showed the following maximum drift values Northridge 1994 Earthquake 2.45%, Kobe 1995 Earthquake 7.598%, Chichi Earthquake 5.757%, Scaled Padang Earthquake Record 2.174%. These results demonstrate how different earthquake events affect the performance of an irregular building and highlight the importance of conducting detailed seismic evaluations in earthquake-prone regions such as Padang.
Co-Authors afrianti, Suratni Bawamenewi, Setiaman Desfitri, Dr. Eng. Erda Rahmilaila Edi Nasra Hendri Warman Khaidir, Indra Kurinci, Wahyudiansyah Naldi, Nofri Nori Yusri Reni Desmiarti Rian Gordon Sitorus Riga Riga Risayanti RM, Redha Arima Suratni Afrianti Syamsi Aini Trisna Kumala Sari Veronika Zufrimar, Zufrimar