Garuda - Garba Rujukan Digital

Durability performances of ferronickel slag aggregate and seawater concrete Sandra, Nevy; Caronge, Muhammad Akbar; Sunaryati, Jati; Kawaai, Keiyu; Nsama, Willick; Arbi, Yaumal; Arifin, Ari Syaiful Rahman
Teknomekanik Vol. 8 No. 1 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i1.34572

The rising demand for concrete in the building sector has resulted in the exhaustion of natural sand and freshwater supplies, leading to the pursuit of sustainable substitutes. Coastal areas have plentiful ferronickel slag (SL) and seawater (SW), which can be used to manufacture concrete. Nevertheless, the possibility of corrosion to steel reinforcement raises concerns that require further research. This investigation examines the mechanical and durability performance of concrete that incorporates SL as a partial replacement for fine aggregate and SW as a mixing component. The objective is to optimize SL content to improve compressive strength, resistance to chloride ions, and overall durability. Experimental results show that replacing 25% of the aggregate with SL yields the best combination of workability, strength, and durability, significantly enhancing compressive strength, decreasing porosity, and lessening chloride ion penetration, as evidenced by the Rapid Chloride Penetration Test (RCPT). Although seawater promotes early-age hydration and strength development, its extended use slightly diminishes compressive strength due to salt-induced micro-cracking. However, SL counters these effects, making SW–SL mixture a feasible and sustainable option for concrete production in coastal and resource-limited areas. A significant relationship between RCPT and compressive strength underscores the important role of SL in densifying the matrix and improving impermeability. The concrete mixture with 25% SL exhibits the lowest abrasion weight loss at 28 and 120 days, showing improved durability. This study highlights the potential of using SL and seawater to create eco-friendly and high-performance concrete for harsh environments.

System dynamics modelling of integrated urban clean water management: A case study in Padang City, Indonesia Arbi, Yaumal; Ramadhianty, Rumia; Rahayu, Shinta; Putri, Widia
Journal of Engineering Researcher and Lecturer Vol. 4 No. 2 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i2.184

Access to clean water is essential for human life and a key target of Sustainable Development Goal (SDG) 6: Clean Water and Sanitation. However, cities in developing countries, including Padang City, Indonesia, face significant challenges in meeting the growing demand due to population growth and limited water infrastructure. This study used system dynamics modelling approach with Powersim Studio 10 to develop an integrated clean water management system for Padang City. The model simulates the dynamics of population growth, water consumption, production, and distribution efficiency over a 20-year period (2022–2042). Several policy scenarios—optimistic, moderate, and pessimistic—were tested to evaluate their impact on water availability. The baseline scenario predicts a continuous decline in clean water supply due to increasing population, high leakage rates (11.99%), and water wastage (2%), which surpass the water production growth rate (5.01%). As a result, a water deficit is expected. However, under the optimistic scenario, with increased production (10%), reduced leakage (8%), and reduced wastage (3%), Padang City could achieve a clean water surplus by 2042. The moderate and pessimistic scenarios still result in a deficit. This research highlights the value of the system dynamics modelling in forecasting urban water demand and assessing policy impacts. The findings emphasize the need for integrated planning, combining technical solutions and behavioural change, to ensure sustainable water management and support the achievement of SDG 6.

Self-Efficacy as a predictor of entrepreneurial interest among university students: A quantitative study Mulyani, Yusni; Arbi, Yaumal
Jurnal Pendidikan Teknologi Kejuruan Vol 8 No 2 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v8i2.44023

Entrepreneurship is increasingly seen as an important strategy in reducing unemployment among college graduates and promoting economic resilience. This study aims to examine the predictive role of self-efficacy an individual's belief in their ability to complete a specific task in shaping entrepreneurial interest among university students. Self-efficacy is believed to influence how individuals perceive opportunities and challenges in starting a business, thereby playing a central role in entrepreneurial motivation. A descriptive quantitative approach was used in this study, with data collected through a structured questionnaire distributed to 348 students from nine faculties at the University of Padang. The questionnaire was designed using a Likert scale to measure levels of self-efficacy and interest in entrepreneurship. Data analysis was conducted using descriptive tests, normality, linearity, homogeneity, and hypothesis testing using Pearson's correlation. The results of the study showed a positive and significant relationship between self-efficacy and entrepreneurial interest (significance value= 0.012), with a Pearson correlation coefficient of 0.113, indicating a moderate relationship. Most students demonstrated relatively low levels of self-efficacy and interest in entrepreneurship, but students with high self-efficacy tended to have greater interest in entrepreneurship. These findings emphasize the importance of integrating self-confidence building into university entrepreneurship programs to enhance students' readiness and motivation to enter the entrepreneurial world after graduation.

Analysis of Irrigation Water Requirement in Batang Sanipan 2 Irrigation Area Limapuluh Kota Regency Arbi, Yaumal; Jamarun, Novirman; Sumbara, Bagas
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.4

Limapuluh Kota Regency is one of the rice producing districts in West Sumatra Province, so an irrigation network is needed to meet water requirement for agricultural productivity. The problem that occurs in the Batang Sanipan 2 irrigation area is the inability of water to flow through the service area to the end point of the irrigation area. Based on observations from e-PAKSI data from the Limapuluh Kota Regency Public Works Office, water can only flow up to a distance of 3.175 km from the intake gate and experience water loss along 1.445 km to the end of the canal. Therefore, it is necessary to study the analysis of irrigation water requirement in the irrigation area of Batang Sanipan 2, Limapuluh Kota Regency. This type of research is descriptive with a quantitative approach. Research methods carried out directly in the field. Based on data analysis, the results obtained from the manual calculation of KP – 01 the maximum irrigation water requirement with a value of 0.139 m3/second which occurred in March, while in the Cropwat software the maximum irrigation water requirement with a value of 0.149 m3/second which occurred in July. The results of measuring the discharge at the intake of the Batang Sanipan 2 weir obtained a discharge of 0.378 m3/second. Based on this, water is sufficient to flow through the entire agricultural area of the Batang Sanipan 2 irrigation area, but the current conditions are that water is not able to flow through parts of the Batang Sanipan 2 irrigation service area.

Desain Peta Irigasi Petak Tersier L1 Ta Sunua Tengah Daerah Irigasi Batang Anai II Arbi, Yaumal; Chandra, Arief
CIVED Vol. 9 No. 3 (2022): September 2022
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v9i3.355112

Penelitian ini membahas tentang desain peta irigasi petak tersier L1 TA Sunua Tengah Daerah Irigasi Batang Anai II yang efektif. Penelitian ini bertujuan untuk mengungkapkan dokumen perencanaan berupa peta irigasi petak tersier L1 TA Sunua Tengah dan gambar penampang saluran. Jenis penelitian ini adalah penelitian dengan pendekatan kuantitatif. Penelitian dilakukan dengan mengumpulkan data SHP batas desa maret 2020, SHP Kab. Padang Pariaman, data bahan kontur DEM SRTM 30 m Sumatera Barat, citra satelit google earth pro, data GPS dilapangan dan data skema jaringan Irigasi Batang Anai II. Untuk selanjutnya diolah pada program aplikasi global mapper v.20 dan arcgis 10.8 mengikuti standar kriteria perencanaan irigasi KP-07. Berdasarkan data skema jaringan Irigasi Batang Anai II dan standar kriteria perencanaan irigasi KP-05 di dapatkan dimensi saluran tersier L1 TA Sunua Tengah. Hasil penelitian menunjukkan bangunan sadap tersier berada pada elevasi tertinggi yaitu 16 m, dan elevasi sawah terendah berada pada elevasi 6 m, panjang saluran tersier keseluruhan 422 m, diantaranya saluran tersier (T1-T2) yaitu 172 m, saluran tersier (T2-T3) 170 m dan saluran tersier (T3-K1) yaitu 80 m. Untuk saluran kuarter keseluruhan 1640 m diantaranya kuarter a1 yaitu 290 m, saluran kuarter b1 90 m, saluran kuarter c1 490 m, saluran d1 yaitu 440 m dan saluran kuarter e1 yaitu 330 m. Untuk jarak antara saluran pembuang dan kuarter yaitu antara 167 m hingga 290 m. 5. Untuk luasan persawahan yang tidak bisa diairi yaitu persawahan pada elevasi 17 m dan 18 m, seluas 4 Ha. Sedangkan untuk dimensi saluran tersier L1 TA Sunua Tengah Jaringan Irigasi Batang Anai II yang didapatkan yaitu b = 0.3 m, H = 0.5 m, Q = 0,0668 m3/det, V = 1.23 m/det dan kemiringan dasar saluran 0,00355.

Sumur Resapan untuk Pemenuhan Kebutuhan Air Bagi Masyarakat Kenagarian Aia Gadang Pasaman BaratSumur Resapan untuk Pemenuhan Kebutuhan Air Bagi Masyarakat Kenagarian Aia Gadang Pasaman Barat Sandra, Nevy; Andayono, Totoh; Arbi, Yaumal; Maulana, Majid
CIVED Vol. 10 No. 1 (2023): March 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i1.387112

Setiap tahun pertumbuhan penduduk semakin meningkat yang mengakibatkan berubahnya fungsi area lahan resapan air sebagai penopang kebutuhan air manusia dan makhluk hidup lainnya menjadi area pemukiman dan perladangan dan persawahan serta peruntukkan lainnya. Hal ini mengakibatkan berkurangnya area resapan dangkal sehingga cadangan air tanah menjadi semakin menipis. Menyikapi perubahan lahan pertanian dan DAS diperlukan solusi tepat dan jangka pendek di kalangan masyarakat pertanian untuk memenuhi kebutuhan air pertanian, yaitu memanfaatkan curah hujan daerah yang melimpah. Sumur resapan menggunakan teknologi sederhana dengan menahan laju air hujan agar tidak menjadi limpasan langsung ke drainase. Beberapa sumur resapan individual ini diolah dan disatukan kedalam bangunan penangkap (reservoir) yang nantinya bisa langsung dimanfaatkan bagi sektor produktif yaitu pelaku usaha pertanian dan perladangan serta sektor non-produktif yaitu pemakaian rumah tangga. Pelaksanaan Kegiatan Pengabdian Masyarakat ini dilaksanakan di Kenagarian Aia Gadang Kabupaten Pasaman Barat. Pembangunan konstruksi sumur resapan percontohan melibatkan masyarakat kenagarian serta monitoring pasca konstruksi dan pelatihan tenaga lokal untuk pengelolaan berkelanjutan. Konstruksi bangunan sumur serapan yang dibangun mengambil sampel 2 (dua) unit rumah yang akan dikomunalkan dengan satu buah reservoir dan disediakan pipa saluran air lengkap dengan aksesorisnya yang bisa langsung digunakan oleh masyarakat sekitar.

Analisis Kebutuhan Air Irigasi pada Daerah Irigasi Air Ketahun Kabupaten Lebong Provinsi Bengkulu Arbi, Yaumal; Rani, Thania Mustika
CIVED Vol. 10 No. 2 (2023): June 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i2.442

Kabupaten Lebong merupakan salah satu kabupaten produsen padi andalan di Provinsi Bengkulu. Namun, pada tahun 2021 terjadi penurunan luas lahan baku sawah yang sebelumnya 9.444 Ha menjadi 8.142 Ha. Daerah Irigasi Air Ketahun merupakan daerah irigasi dengan luas lahan fugsional sawah terluas di Kabupaten Lebong yaitu sebesar + 2070,4 Ha. Daerah irigasi ini berada di 3 (tiga) kecamatan yaitu Kecamatan Bingin Kuning, Lebong Sakti dan Amen. Daerah irigasi ini memanfaatkan air dari Bendung Air Ketahun yang terletak di Kecamatan Bingin Kuning. Tujuan dari penelitian ini adalah untuk menganalisis kebutuhan air pada Daerah Irigasi Air Ketahun dan ketersediaan air pada Bendung Air Ketahun. Metode yang digunakan adalah metode kuantitatif. Curah hujan daerah didapatkan dengan perhitungan metode Poligon Thiessen. Perhitungan kebutuhan air irigasi dilakukan sesuai Kriteria Perencanaan (KP-01). Ketersediaan air didapatkan dari perhitungan debit andalan dengan probabilitas Weibull. Hasil keluaran WEAP berupa persentase luas cakupan air yang dapat dipenuhi (Coverage). Berdasarkan hasil analisis data, didapatkan nilai kebutuhan air irigasi maksimum sebesar 4,21 m3/dt. Sedangkan ketersediaan air maksimum di Bendung Air Ketahun adalah sebesar 66,57 m3/detik. Dan berdasarkan keluaran dari program WEAP, diketahui bahwa ketersediaan air di Bendung mampu memenuhi kebutuhan air irigasi untuk melaksanakan Musim Tanam dua kali dalam setahun (MT II) dengan pola tanam Padi-Padi.

Flood Modeling of the Batang Sungai Lengayang Area with Hec-Ras Program islami, Zaidina Resvita; Arbi, Yaumal
CIVED Vol. 12 No. 1 (2025): March 2025
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v12i1.676

Floods are disasters that disrupt human life caused by human and natural factors. Natural conditions that affect flooding in West Sumatra are rainfall patterns in water areas, sea surface temperature patterns, and whirlpool patterns in the Indian Ocean. Batang Lengayang is a river that is prone to flooding. Floods in the Batang Lengayang river occur every year, especially during the rainy season. According to the Central Statistics Agency of Pesisir Selatan Regency, in Lengayang District, floods were recorded 5 times throughout 2020, 8 times in 2021, and 10 times in 2022. Meanwhile, in 2024, there was also a flash flood on March 7 which was caused by very high rainfall intensity and on a long time scale. This study aims to determine the flood discharge of the Batang Lengayang river with a return period of 50 and 100 years. Furthermore, this study also aims to model the Batang Lengayang river flood using HEC RAS. And to determine the area of flood inundation of the Batang Lengayang river for a return period of 50 and 100 years. The results of the study showed that the 50-year return period produced a maximum flood discharge of 399 m³/second and the 100-year return period produced a maximum flood discharge of 444.46 m³/second. The modeling results showed that the flood area increased with the addition of the return period. The flood area obtained was 376 ha or 3.7 km² for the 50-year return period and 412 ha or 4.12 km² for the 100-year return period.

System dynamics modelling of integrated urban clean water management: A case study in Padang City, Indonesia Arbi, Yaumal; Ramadhianty, Rumia; Rahayu, Shinta; Putri, Widia
Journal of Engineering Researcher and Lecturer Vol. 4 No. 2 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i2.184

Access to clean water is essential for human life and a key target of Sustainable Development Goal (SDG) 6: Clean Water and Sanitation. However, cities in developing countries, including Padang City, Indonesia, face significant challenges in meeting the growing demand due to population growth and limited water infrastructure. This study used system dynamics modelling approach with Powersim Studio 10 to develop an integrated clean water management system for Padang City. The model simulates the dynamics of population growth, water consumption, production, and distribution efficiency over a 20-year period (2022–2042). Several policy scenarios—optimistic, moderate, and pessimistic—were tested to evaluate their impact on water availability. The baseline scenario predicts a continuous decline in clean water supply due to increasing population, high leakage rates (11.99%), and water wastage (2%), which surpass the water production growth rate (5.01%). As a result, a water deficit is expected. However, under the optimistic scenario, with increased production (10%), reduced leakage (8%), and reduced wastage (3%), Padang City could achieve a clean water surplus by 2042. The moderate and pessimistic scenarios still result in a deficit. This research highlights the value of the system dynamics modelling in forecasting urban water demand and assessing policy impacts. The findings emphasize the need for integrated planning, combining technical solutions and behavioural change, to ensure sustainable water management and support the achievement of SDG 6.

PERENCANAAN NORMALISASI SALURAN DRAINASE PRIMER BERBASIS ANALISIS HIDROLOGI DAN HIDROLIKA PADA KAWASAN UNIVERSITAS NEGERI PADANG Chalik, Adrian; Arbi, Yaumal
Jurnal Applied Science in Civil Engineering Vol 6 No 3 (2025): Jurnal Applied Science in Civil Engineering
Publisher : Teknik Sipil Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/asce.v6i3.130683

Penelitian ini bertujuan untuk merancang normalisasi saluran drainase primer di kawasan Universitas Negeri Padang sebagai upaya mengatasi masalah genangan dan luapan air yang sering terjadi. Metode yang digunakan meliputi analisis hidrologi untuk menentukan debit banjir rencana dengan periode ulang 50 dan 100 tahun menggunakan Metode Rasional, serta analisis hidrolika dengan bantuan perangkat lunak HEC-RAS untuk mengevaluasi kinerja saluran sebelum dan sesudah normalisasi. Hasil penelitian menunjukkan bahwa saluran eksisting tidak mampu menampung debit rencana karena dimensi penampang yang kurang memadai dan kecepatan aliran yang terlalu rendah. Setelah dilakukan desain ulang penampang saluran dengan mempertimbangkan elevasi, kemiringan dasar, dan debit rencana, diperoleh peningkatan kapasitas aliran yang signifikan. Simulasi HEC-RAS pada kondisi normalisasi menunjukkan bahwa muka air berada di bawah tebing saluran, dengan kecepatan aliran memenuhi syarat minimum 0,7 m/detik. Kesimpulannya, normalisasi saluran secara teknis efektif dalam meningkatkan kapasitas dan kinerja hidraulik saluran drainase primer di kawasan kampus UNP.

Title

Found 64 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 64 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 64 Documents
Search