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The Application and Relevancy of Rainfall-Runoff-Inundation (RRI) Model in Indonesia M. Faisi Ikhwali; Budi Azhari; Alfin Khari; Suardi Nur; Abd Mujahid Hamdan; Kingkao Prommacot
Elkawnie: Journal of Islamic Science and Technology Vol 9, No 1 (2023)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v9i1.14577

Abstract: Indonesia has a very large number of watersheds and has a very diverse size. Damage to several watersheds in Indonesia has also occurred and often results in catastrophic floods and droughts that threaten people. The presence of the RRI Model with its capabilities will help contribute to watershed management in order to solve water resource problems. The RRI model is a two-dimensional (2D) model capable of simulating runoff, rainfall, and flood inundation simultaneously. The use of this model in Indonesia has reached 13 times which was compiled based on the number of publications on the application of the RRI model. All of these publications have passed peer-reviewed papers from both journals and conference papers. Applications have been made in several places including the Solo watershed, the Upper Citarum watershed, the Batanghari watershed, and the upstream Brantas watershed. Given the increasing number of problematic watersheds in Indonesia, the use of this model has the prospect and relevancy of being carried out in other watersheds. However, until now, researchers have had challenges in building hydrological models because of the constraints on the availability of climatological and hydrological data in the watershed. Therefore, in addition to improving the data measuring infrastructure in the field, remote sensing techniques are also needed in an effort to generate targeted watershed information. In fact, the effort to utilize remote sensing in generating unmeasurable data in the field has been successfully conducted in several studies.Abstrak: Indonesia memliki jumlah DAS yang sangat banyak dan memiliki ukuran yang sangat beragam. Kerusakan beberapa DAS di Indonesia juga telah terjadi dan sering berakibat bencana banjir dan kekeringan yang mengancam penduduk setempat. Kehadiran Model RRI dengan kemampuannya akan membantu berkontribusi dalam memajemen DAS ataupun dalam usaha untuk menyelesaikan permasalahan sumberdaya air. Model RRI adalah suatu model dua dimensi (2D) yang memiliki kemampuan untuk mensimulasikan limpasan curah hujan dan genangan banjir secara simultan. Penggunaan model RRI ini di Indonesia telah mencapai 13 kali, yang tercatat berdasarkan jumlah publikasi yang terkait dengan aplikasi model RRI. Semua publikasi tersebut telah melewati peer-review baik dari jurnal maupun dari konferensi. Aplikasi telah dilakukan dibeberapa tempat termasuk DAS Solo, DAS Citarum, DAS Batanghari, dan DAS Brantas. Mengingat jumlah DAS yang bermasalah di Indonesia semakin meningkat, maka penggunaan model ini memiliki prospek untuk dilakukan di DAS lain. Namun sampai saat ini, para peneliti memiliki tantangan dalam membangun permodelan hidrologi karena terkendala pada ketersediaan data klimatologi dan hidrologi di dalam DAS. Oleh karena itu, selain peningkatan infrastruktur pengukur data dilapangan dan teknik pengindraan jauh juga diperlukan dalam usaha menyediakan informasi DAS yang ditargetkan. Usaha penggunaan teknik pengindraan jauh dalam menyediakan data yang tidak terukur dilapangan telah sukses dan terbukti dilakukan di beberapa studi.

INVESTMENT ANALYSIS OF A 5 MW GEOTHERMAL BINARY CYCLE POWER PLANT Suardi Nur; Mulyadi Abdul Wahid
Indonesian Journal of Environmental Sustainability Vol 1 No 2 (2023): December 2023
Publisher : Center for Environmental Studies, Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ijes.v1i2.4246

Indonesia is blessed with around 27.510 MWe of geothermal resources. Amongst the numbers, some resources are identified as small-scale geothermal resources. The development of small-scale geothermal resources is quite challenging either to government or private developers due to their low selling price that varies from USD 6.50 cent/kWh to USD 9.76 cent/kWh depending on the location and capacity. The challenges can be multiplied in the case of the electricity produced from a geothermal power plant that located isolated grid, where the electricity is unable to be transmitted to another load areas. Therefore, the electricity production will be limited to only serve the demand in the island that consequently will limit the revenue from electricity sales. This study analyzes the financial aspect of a binary geothermal power plant with gross installed capacity of 5 MW located in isolated island. The analysis shows the power plant will be financially feasible when the electricity selling price is over USD 30 cent/kWh that will generate 12% of IRR which is assumed as feasible target for this project. Furthermore, if environmental benefit is included the project can be feasible at lower selling price of USD 25 cent/kWh.

INVESTMENT ANALYSIS OF A 5 MW GEOTHERMAL BINARY CYCLE POWER PLANT Nur, Suardi; Mulyadi Abdul Wahid
Indonesian Journal of Environmental Sustainability Vol. 1 No. 2 (2023): December 2023
Publisher : Center for Environmental Studies, Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ijes.v1i2.4246

Indonesia is blessed with around 27.510 MWe of geothermal resources. Amongst the numbers, some resources are identified as small-scale geothermal resources. The development of small-scale geothermal resources is quite challenging either to government or private developers due to their low selling price that varies from USD 6.50 cent/kWh to USD 9.76 cent/kWh depending on the location and capacity. The challenges can be multiplied in the case of the electricity produced from a geothermal power plant that located isolated grid, where the electricity is unable to be transmitted to another load areas. Therefore, the electricity production will be limited to only serve the demand in the island that consequently will limit the revenue from electricity sales. This study analyzes the financial aspect of a binary geothermal power plant with gross installed capacity of 5 MW located in isolated island. The analysis shows the power plant will be financially feasible when the electricity selling price is over USD 30 cent/kWh that will generate 12% of IRR which is assumed as feasible target for this project. Furthermore, if environmental benefit is included the project can be feasible at lower selling price of USD 25 cent/kWh.

Influence of Alkaline and Acidic Co-precipitation Media on Fe₃O₄/TiO₂ Photocatalyst Performance for the Photodegradation of Cypermethrin Nengsih, Sri; Rahman, Arief; Nur, Suardi
POSITRON Vol 15, No 1 (2025): Vol. 15 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v15i1.92902

The persistence of pesticide residues such as cypermethrin in water bodies has raised environmental concerns, necessitating the development of effective photocatalytic materials for their degradation. This study examines the influence of solvent-assisted magnetite synthesis on the structural, magnetic, and photocatalytic properties of Fe₃O₄/TiO₂ composites for cypermethrin degradation under UV light with a focus on a comparative approach between alkaline and acidic synthesis routes, which has not been extensively reported. Fe₃O₄ was synthesized via co-precipitation using NaOH and HCl to assess the impact of solvent conditions. Xray diffraction confirmed the spinel-phase structure in both samples, while SEM showed finer and more uniform particles in the NaOH-derived sample. VSM analysis revealed that Fe₃O₄–HCl exhibited higher saturation magnetization (Ms = 57.98 emu/g) but lower coercivity (Hc = 0.0206 T) than Fe₃O₄–NaOH (Ms = 41.26 emu/g; Hc = 0.0241 T), indicating synthesis-dependent magnetic properties. UV–Vis analysis identified a cypermethrin absorption peak at 220 nm, which was used to monitor degradation. The Fe₃O₄–NaOH:TiO₂ composite showed superior photocatalytic activity (31.98% degradation in 90 minutes) compared to Fe₃O₄– HCl:TiO₂ (22.86%). Kinetic modeling using the pseudo first-order equation yielded a higher rate constant for Fe₃O₄-NaOH:TiO₂ (k = 0.00172 min⁻¹; R² = 0.769), while Fe₃O₄–HCl:TiO₂ showed slower kinetics but better linearity (k = 0.00030 min⁻¹; R² = 0.9999). These results suggest that alkaline synthesis enhances particle morphology and charge transfer efficiency, improving photocatalytic performance. Therefore, Fe₃O₄–NaOH:TiO₂ represents a promising candidate for cypermethrin remediation in wastewater treatment.

PERENCANAAN UNIT SOLID SEPARATION CHAMBER (SSC) PADA INSTALASI PENGOLAHAN LUMPUR TINJA (IPLT) KOTA SABANG Harahap, Juliansyah; Ishak, Bahagia; Fahira, Firyal; Nur, Suardi
AMINA Vol. 5 No. 3 (2023): December 2023
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/amina.v5i3.4152

Sanitasi merupakan hak pelayanan dasar yang penting, namun hak dasar ini seringkali tidak mendapat perhatian dan menjadi prioritas. Kota Sabang memiliki STP yang terletak di STP Cot Abeuk. Kondisi STP yang tidak beroperasi menyebabkan gedung STP semakin banyak mengalami kerusakan. Berdasarkan observasi di lapangan, terdapat komponen unit pengolahan STP Cot Abeuk yang mengalami kerusakan sehingga memerlukan upaya perbaikan agar dapat dioperasikan kembali. Pengumpulan data dilakukan dengan menggunakan sampling survei, wawancara dan metode lainnya. Hasil pengujian karakteristik lumpur tinja di IPAL Kota Sabang belum memenuhi baku mutu yang ditentukan dalam Peraturan Menteri Lingkungan Hidup dan Kehutanan Nomor 68 Tahun 2016 tentang Baku Mutu Air Limbah Domestik sebagai pedoman baku mutu dalam penelitian ini. Jumlah bak SSC yang akan direncanakan adalah 4 bak dengan dimensi masing-masing bak yaitu panjang 9,75 meter, lebar 2,5 meter dan tinggi 2,10 meter dengan ketebalan endapan lumpur 0,5 meter dan luas permukaan 24,38 meter. Tujuan perencanaan unit SSC di STP Kota Sabang diharapkan STP dapat beroperasi dengan baik.

Application of KdV Equations in Policy-Making for Extreme Wave and Tsunami Predictions in Vulnerable Societies Azhari, Budi; Ikhwali, M. Faisi; Nur, Suardi; Apriliani, Vina
Jurnal Ilmiah Peuradeun Vol. 13 No. 3 (2025): Jurnal Ilmiah Peuradeun
Publisher : SCAD Independent

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26811/peuradeun.v13i3.1046

This study aims to examine the possibility of implementing the KdV equations for policymaking in vulnerable communities. It is crucial as Indonesia is located between two continents and two large oceans, significantly influencing marine phenomena, such as the frequent occurrence of extreme waves. Additionally, seismic activity can cause earthquakes with the potential to trigger tsunamis. Therefore, continuous research on extreme waves and tsunamis is required. This research provides a semi-analytical solution to the KdV equation using disturbance parameters, carried out from the first to the seventh order, to generate maximum waves. In this study, the modified KdV equation considers the bichromatic wave input , 2 wavenumber expansion equations using perturbation theory and Taylor series, and η expansion using perturbation theory to produce a seventh-order solution. This solution differs from third-order and fifth-order solutions in the context of higher-order influences, with the peak distance found to be closer than the initial point. It may indicate that the higher-order effects of the solution influence the maximum peak of the wave. The results of this research contribute to a progressive step in helping communities vulnerable to extreme waves and tsunamis.

Pembuatan Pupuk Cair dari Air Cucian Beras dan Sisa Sampah Dapur Yahya, Husnawati; Rohendi, Aulia; Ashari, Teuku Muhammad; Harahap, Juliansyah; Nur, Suardi; Fathma, Syarifah Seicha; Ginayatri, Lisa
Jurnal Inovasi Penelitian dan Pengabdian Masyarakat Vol. 4 No. 1 (2024): Juni
Publisher : Indonesia Emerging Literacy Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53621/jippmas.v4i1.294

Pengabdian kepada masyarakat merupakan salah satu dari Tri Dharma perguruan tinggi bagi masyarakat. Air cucian beras dan juga limbah dapur merupakan sampah organik yang jarang dimanfaatkan sebagai salah satu alternatif pupuk yang ramah lingkungan. Sebagian besar sampah dapur dapat dijadikan pupuk kompos maupun pupuk cair. Tujuan dilakukan pengabdian ini adalah untuk memberikan edukasi bagi masyarakat tentang pemanfaatan limbah dapur dan juga air cucian beras sebagai salah satu unsur hara alami bagi tanaman. Dengan cara ini diharapkan dapat mengurangi sampah organik rumah tangga. Metode yang digunakan dalam pengabdian ini berupa pemberian penyuluhan dan praktek pembuatan pupuk. Bahan yang digunakan berupa air cucian beras, gula merah dan juga sisa sampah dapur. Campuran tersebut difermentasi selama 7-10 hari. Selama proses ini berlangsung, tutup wadah dibuka sesaat untuk mengurangi kebocoran wadah akibat gas-gas hasil fermentasi yang dihasilkan oleh bakteri. Hasil fermentasi air cucian beras dan juga limbah dapur setelah 7-10 hari berwarna kecoklatan dan berbau sedikit asam. Hasil pengabdian ini berupa pupuk organik cair yang siap diaplikasikan bagi tanaman. Pengaruh pemberian pupuk terhadap tanaman belum dilakukan karena keterbatasan waktu dan akan dilakukan survei pada agenda kegiatan pengabdian berikutnya di Desa Lamreh.

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