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Transformation of Geospatial Modelling of Soil Erosion Susceptibility Using Machine Learning Olii, Muhammad Ramdhan; Nento, Sartan; Doda, Nurhayati; Olii, Rizky Selly Nazarina; Djafar, Haris; Pakaya, Ririn
Journal of the Civil Engineering Forum Vol. 11 No. 2 (May 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.19581

Soil erosion presents substantial environmental and economic challenges, especially in areas prone to land degradation. This study assesses the use of Machine Learning (ML) methods—Support Vector Machines (SVM) and Generalized Linear Models (GLM)—to model Soil Erosion Susceptibility (SES) in the Saddang Watershed, Indonesia. It incorporates environmental, hydrological, and topographical factors to improve prediction accuracy. The approach includes multi-source geospatial data collection, erosion inventory mapping, and relevant factor selection. SVM and GLM were applied to classify SES, with performance evaluated using accuracy, AUC, and precision metrics. Results show SVM classified 40.59% of the area as moderately susceptible and 38.50% as low susceptibility. GLM identified 24.55% as very low and 38.59% as low susceptibility. Both models demonstrated high accuracy (SVM: 87.4%, GLM: 87.2%) and strong AUC values (SVM: 0.916, GLM: 0.939), though GLM showed better specificity and recall. Feature importance analysis highlights that GLM favors hydrological factors like river proximity and drainage density, while SVM balances across various environmental inputs. These findings affirm the value of ML-based geospatial modeling for SES assessment, supporting interventions such as reforestation and erosion control. SVM is suitable for localized planning, whereas GLM offers strategic-level insights. This research contributes to advancing environmental modeling by embedding domain knowledge into ML frameworks, and suggests future work integrate real-time remote sensing and more sophisticated models for broader SES prediction.

Enhancing Compressive Strength of Self-Compacting Concrete (SCC) through Rice Husk Ash and Superplasticizer Incorporation Olii, Muhammad Ramdhan; Ali, Azhar Zukur Putra M.; Djau, Rahman Abdul; Doda, Nurhayati; Olii, Rizky Selly Nazarina
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.611

The increasing demand for sustainable construction materials has encouraged the utilization of alternative materials, such as rice husk ash (RHA), and the use of chemical admixtures like superplasticizers in self-compacting concrete (SCC). This study aims to evaluate the effects of RHA and superplasticizer incorporation on the fresh and hardened properties of SCC, focusing on flowability, segregation resistance, and compressive strength. The experimental program involved three SCC mixtures: normal concrete, and SCC with 4% and 8% RHA and superplasticizer by cement weight. Fresh concrete properties were assessed using the slump flow, V-Funnel, and L-Box tests, while compressive strength tests were conducted on cube specimens after 28 days of curing. The results indicated that the addition of 4% RHA and superplasticizer enhanced the compressive strength to 34.02 MPa and maintained flowability within the specified limits, with an average slump flow diameter of 675–697 mm, V-Funnel time of 7.35–8.72 seconds, and L-Box ratio of 0.84–0.85. However, the 8% RHA mixture exhibited a decline in compressive strength (28.51 MPa), highlighting the detrimental effects of excessive superplasticizers on particle cohesion. Furthermore, the use of RHA reduced concrete density, showcasing its potential for lightweight construction applications. These findings confirm that a 4% RHA and superplasticizer dosage optimizes SCC performance, supporting sustainable construction through resource-efficient and durable materials. The study underscores the need for precise mix designs and suggests broader applications of RHA and chemical admixtures in advancing green concrete technologies.

ANALISIS DAERAH RAWAN BANJIR KOTA GORONTALO BERBASIS SISTEM INFORMASI GEOGRAFIS (SIG) Doda, Nurhayati
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 1 No. 2 (2013): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v1i2.33

ABSTRAK Penelitian ini bertujuan untuk mengetahui daerah rawan banjir di wilayah Kota Gorontalo berbasis Sistem Informasi Geografis (SIG). Penelitian ini dilaksanakan di Kota Gorontalo. Metode yang digunakan dalam penentuan daerah rawan banjir adalah metode overlay (tumpang susun peta) dengan pembobotan dan skoring terhadap parameter penyebab terjadinya banjir yaitu Debit limpasan permukaan rencana, Topografi, Tekstur tanah dan ketebalan permukaan tanah dengan proses analisis menggunakan perangkat lunak ArcGIS 9,3. Sumber-sumber data diperoleh dari instansi terkait. Peta citra digital untuk wilayah Kota Gorontalo diperoleh dari Google Earth pada bulan Mei tahun 2011. Hasil penelitian dengan pembobotan untuk debit limpasan permukaan 45%, topografi 25%, tekstur tanah 20% dan ketebalan permukaan tanah 10%, menunjukkan bahwa daerah rawan banjir dengan potensi sangat tinggi terjadi di sebagian Kecamatan Kota Tengah dan Kota Selatan, banjir dengan potensi tinggi terjadi di sebagian Kecamatan Kota Selatan dan Dungingi, banjir dengan potensi sedang terjadi di sebagian Kecamatan Kota Utara, dan Kota Tengah. Sedangkan banjir dengan potensi rendah dan sangat rendah di sebagian Kecamatan Kota Utara, Kota Barat dan Selatan. Kata Kunci : SIG, Banjir Gorontalo

UJI KARAKTERISTIK BETON TERHADAP PERLAKUAN PENCAMPURAN SPESI YANG DIDAPATKAN DENGAN YANG TIDAK DIDAPATKAN Doda, Nurhayati
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 3 No. 2 (2015): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v3i2.76

ABSTRAK Pemadatan adalah salah satu perlakuan yang sangat penting pada proses pembuatan beton karena berpengaruh terhadap kuat tekan beton. Tujuan dari penelitian ini adalah mengkaji seberapa besar pengaruh pemadatan beton terhadap karakteristik kuat tekan beton, sehingga perlu di lakukan penelitian secara ilmiah mengenai perbandingan kekuatan beton yang dipadatkan dan tidak dipadatkan. Penlitian ini dimulai dengan pengujian terhadap karakteristik material pembentuk beton berdasarkan spesifikasi SNI 91 dan selanjutnya perencannaan proporsi campuran berdasarkan Standar Nasional Indonesia 91 dengan beton Karakteristik 225 dan K 300. Pengujian pada material serta sampel uji beton dilakukan di Laboratorium Teknik Sipil Universitas Gorontalo dengan hasil pengujian kuat tekan dengan mutu rencana 250 kg/cm2 yang dipadatkan diperoleh kuat tekan sebesarn265,4 Kg/cm2 dan yang tidak dipadatkan diperoleh kuat tekan sebesar 221,2 Kg/cm2. Sedangkan terhadap muru rencana K 300 Kg/cm2 yang dipedatkan diperoleh kuat tekan sebesar 342,5 Kg/cm2 sedangkan yang tidak dipadatkan diperoleh kuat tekan sebesarr 256,2 Kg/cm2. Kata kunci: Beton dipadatkan, beton tidak dipadatkan

PENGARUH ABU CANGKANG PALA SEBAGAI SUBTITUSI FILLER TERHADAP CAMPURAN LAPISAN AC-WC Doda, Nurhayati; Rahman, Fatur
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 1 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v10i1.263

Abstrak : Pengaruh Abu Cangkang Pala Sebagai Subtitusi Filler Terhadap Campuran Lapisan AC – WC). Latar belakang penelitian ini bertitik tolak dari permasalahan yang berada dilapangan. Penulis melihat bahwasannya kejadian dilapangan yang sangat kritis karena disebabkan oleh semakin berkurangnya bahan pengisi (filler). Dari hal ini penulis tergerak untuk memanfaatkan cangkang pala sebagai subtitusi bahan pengganti (filler) agar supaya dapat menghambat berkurangnya penurunan bahan tambah (filler). Tujuan penelitian kali ini adalah untuk mencari dan membuktikan bahwa apakah abu cangkang pala bisa mengganti atau mensubtitusi filler terhadap campuran lapisan AC-WC dengan melewati beberapa proses penelitian seperti mencari hasil dari pemeriksaan sifat-sifat fisis material sampai pada pengujian Marshall Test. Penelitian yang penulis lakukan disini adalah penelitian didalam laboratorium yang bersifat eksperimen. Penelitian ini penulis lakukan di Laboratorium Terpadu Universitas Gorontalo. Dipenelitian kali ini, penulis membuat beberapa variasi untuk filler abu cangkang pala yaitu 0%, 10%, 25%, 50%, 75%, dan 100%. Hasil dari penelitian kali ini yaitu semua variasi yang diuji telah memenuhi spesifikasi dari setiap pengujian. Pengujian yang dimaksud adalah stabilitas, kelelehan (flow), Void In the Mix (VIM), Void in Mineral Agregat (VMA), Void Filled with Aspalt (VFA), Marshall Quotient (MQ). Abstract: The Effect of Nutmeg Shell Ash as Filler Substitution on AC-WC Layer Mixture. The background of this research is based on the problems in the field. The author sees that the incident in the field is very critical because it is caused by the decrease in filler material. From this, the author was moved to use nutmeg shells as a substitute for fillers in order to prevent the decrease in the decrease in fillers. The purpose of this study is to find and prove that whether nutmeg shell ash can replace or substitute filler for the AC-WC layer mixture by going through several research processes such as looking for results from examining the physical properties of the material to the Marshall Test.The research that the author is doing here is an experimental research in a laboratory. This research was conducted at the Integrated Laboratory of the University of Gorontalo. In this study, the authors made several variations for the nutmeg shell ash filler, namely 0%, 10%, 25%, 50%, 75%, and 100%. The results of this study are all variations tested have met the specifications of each test. The tests in question are stability, melt (flow), Void In the Mix (VIM), Void in Mineral Aggregate (VMA), Void Filled with Asphalt (VFA), Marshall Quotient (MQ).

ANALISIS KARAKTERISTIK BETON MENGGUNAKAN TEMPURUNG KELAPA PENGGANTI SEBAGIAN AGREGAT KASAR DENGAN MUTU FC 20 MPA Nento, Sartan; Abdullah, Julius Tri Octavian R.; Doda, Nurhayati; Olii, Muh. Ramdhan; Djau, Rahman A
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 2 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstrak: Analisis Karakteristik Beton Menggunakan Tempurung Kelapa Pengganti Sebagian Agregat Kasar Dengan Mutu Fc 20 MPA. Teknologi bahan serta teknik-teknik pelaksanaan yang diperoleh dari hasil penelitian dan percobaan dimaksudkan untuk menjawab tuntutan yang semakin tinggi terhadap pemakaian beton serta mengatasi kendala-kendala yang sering terjadi pada pengerjaan di lapangan. Peningkatan mutu beton dapat dilakukan dengan memberikan bahan ganti atau bahan tambah, Salah satu bahan alternatif yang dapat digunakan sebagai bahan pengganti yaitu pecahan tempurung kelapa. Penelitian ini bertujuan untuk mengetahui karakteristik, nilai kuat tekan beton pada umur 28 hari yang telah menggunakan pecahan tempurung kelapa pengganti sebagian agregat kasar pada kadar 3%, 5.5%, 7.5%, 9.5% dan 11.5%. Pengumpulan data dilakukan dengan uji Laboratorium berdasarkan SNI 2012. Analisis data dilakukan dengan menghitung rata-rata hasil pengujian kemudian dibandingkan dengan SNI-7656 2012. Dari hasil penelitian pada kadar 3% tempurung kelapa didapatkan nilai kuat tekan 20.66 MPA di bandingkan dengan kuat tekan beton normal rencana menurut SNI 7656: 2012 yaitu 20 MPA mengalami kenaikan sebesar 3.3%. Jadi dengan menggunakan Pecahan tempurung kelapa sebagai bahan pengganti sebagian agregat kasar pada campuran beton dapat menghasilkan nilai kuat tekan beton lebih tinggi daripada kuat tekan yang direncanakan. Kata kunci :Tempurung Kelapa; Agregat Kasar; Beton Abstract: Analysis of Concrete Characteristics Using Coconut Shell as Partial Substitute for Coarse Aggregate with Fc Quality 20 MPA. Material technology and implementation techniques obtained from the results of research and experiments are intended to answer the increasingly high demands on the use of concrete and overcome obstacles that often occur in field work. Improving the quality of concrete can be done by providing substitute materials or added materials. One alternative material that can be used as a substitute is coconut shell fragments. This study was conducted to determine the characteristics of the compressive strength of concrete at the age of 28 days using coconut shell fraction as a partial replacement for coarse aggregate at levels of 3%, 5.5%, 7.5%, 9.5% and 11.5%. Data collection was carried out by laboratory tests based on SNI 2012. Data analysis was carried out by calculating the average test results and then compared with SNI-7656 2012. From the results of the study at the level of 3% coconut shell, the compressive strength value of 20.66 MPA was compared with the compressive strength of normal concrete. The plan according to SNI 7656: 2012 which is 20 MPA increased by 3.3%. Therefore, by using coconut shell fragments as a partial substitute for coarse aggregate in the concrete mixture, it can produce a higher compressive strength value of concrete than the planned compressive strength. Keywords: coconut shell; Coarse Aggregate; Concrete

PERENCANAAN GEDUNG RAWAT INAP RS MM DUNDA MENGUNAKAN SOFTWARE SAP 2000 Nento, Sartan; Otto, Abdul Rajab; Olii, Muh Ramdhan; Olii, Aleks; Doda, Nurhayati
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 2 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i2.413

This research aims to analyze the structural analysis of a building using software Since computerization is used to complete every building plan or design, the development of technology and information, especially computerization in the world of construction, cannot be separated anymore and is not a new phenomenon. The decision to use a computer to complete construction plans was based on the fact that computers have the advantage of not only being able to finish quickly but also having accuracy, effectiveness, and ease of use (Dwi Deshariyanto, Anita Intan Nura Diana 2021). The following findings have been achieved based on the final results of the development of this final report. using the SAP 2000 version 22 program to calculate reinforcement in columns, beams, and floor slabs, Using earthquake response spectrum design analysis, earthquake load calculations refer to SNI 1726: 2019 (Procedures for Planning Earthquake Resistance for Buildings and Non-Buildings), The design of this building is based on the type of reinforced concrete structure and the Unique Moment Resisting Frame System (SRPMK). The floor difference is in accordance with the relevant SNI criteria

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