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Pemodelan Perubahan Garis Pantai Ujung Tape Kabupaten Pinrang Irwan, Irwan; Ihsan, Muhammad
Jurnal Teknik Sipil : Rancang Bangun Vol 6, No 1 (2020): April 2020
Publisher : Universitas Muhammadiyah Sorong

Penelitian ini bertujuan untuk mengetahui magnitudo erosi dan sedimentasi garis pantai Ujung Tape dalam proyeksikan lima tahunan dan di mana letak bangunan pelindung pantai yang bisa diterapkan di lokasi tersebut. Metode penelitianÂ yang digunakan adalah memodelkan gelombang dan garis pantai pada software STWAVE dan GENESIS yang berbasis model numerik. Kalibrasi model dilakukan dengan memodelkan garis pantai terukur (measured shoreline) dan garis pantai awal (initial shoreline) untuk mendapatkan koefisien kalibrasi (k1 dan k2). Nilai k1 dan k2 yang memiliki kesalahan error (Æc) yang terkecil dan memiliki tren yang lebih mendekati perubahan garis pantai di lokasi digunakan sebagai variabel bebas terpilih untuk mensimulasikan garis pantai dalam lima tahun ke depan. Simulasi garis pantai juga dilakukan dengan penambahan model bangunan pelindung pantai yaitu pemecah gelombang (skenario A dan B). Hasil simulasi dari tahun pertama sampai tahun kelima menunjukkan garis pantai dominan mengalami erosi walaupun di beberapa grid mengalami sedimentasi. Sel grid ke 480 sampai 2640 mengalami erosiÂ dimana yang terbesar adalah sel grid ke 1540 dengan erosi -7331.99 m3. Perubahan garis Pantai Ujung Tape dari tahun pertama sampai tahun kelima menunjukkan pantai dominan mengalami erosi dengan volume angkutan sedimen sebesar â€“462.863 m3. Bentuk perlindungan garis pantai Ujung Tape yang dapat mencegah erosi adalah melalui model breakwater skenario A dan BÂ dengan tangkapan sedimen sebesar 509.583 m3/tahun (skenario A) dan 463.370 m3/tahun (skenario B).

Examining Polyethylene Terephthalate (PET) as Artificial Coarse Aggregates in Concrete Bachtiar, Erniati; Mustaan, Mustaan; Jumawan, Faris; Artayani, Meldawati; Tahang, Tahang; Rahman, Muhammad Junaedy; Setiawan, Arman; Ihsan, Muhammad
Civil Engineering Journal Vol 6, No 12 (2020): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2020-03091626

This study aims to examine the effect of recycled Polyethylene Terephthalate (PET) artificial aggregate as a substitute for coarse aggregate on the compressive strength and flexural strength, and the volume weight of the concrete. PET plastic waste is recycled by heating to a boiling point of approximately 300Â°C. There are five variations of concrete mixtures, defined the percentage of PET artificial aggregate to the total coarse aggregate, by 0, 25, 50, 75 and 100%. Tests carried out on fresh concrete mixtures are slump, bleeding, and segregation tests. Compressive and flexural strength tests proceeded based on ASTM 39/C39M-99 and ASTM C293-79 standards at the age of 28 days. The results showed that the use of PET artificial aggregate could improve the workability of the concrete mixture. The effect of PET artificial aggregate as a substitute for coarse aggregate on the compressive and flexural strength of concrete is considered very significant. The higher the percentage of PET plastic artificial aggregate, the lower the compressive and flexural strength, and the volume weight, of the concrete. Substitution of 25, 50, 75 and 100% of PET artificial aggregate gave decreases in compressive strength of 30.06, 32.39, 41.73 and 44.06% of the compressive strength of the standard concrete (18.20 MPa), respectively. The reductions in flexural strength were by respectively 19.03, 54.50, 53.95 and 61.00% of the standard concrete's flexural strength (3.59 MPa). The reductions in volume weight of concrete were by respectively 8.45, 17.71, 25.07 and 34.60% of the weight of the standard concrete volume of 2335.4 kg/m3Â Doi: 10.28991/cej-2020-03091626 Full Text: PDF

Kajian Komputasi Pengaruh Penerapan Blowing pada Bagian Belakang Model Kendaraan Rustan Tarakka; Nasaruddin Salam; Andi Amijoyo Mochtar; Muhammad Ihsan; Wawan Rauf
Semesta Teknika Vol 25, No 1 (2022): MEI 2022
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v25i1.13478

Drag aerodinamika pada kendaraan disebabkan adanya tekanan rendah dan separasi aliran di bagian belakang, yang berdampak pada menurunnya kecepatan, meningkatnya penggunaan bahan bakar, dan turunnya efisiensi kendaraan. Blowing merupakan salah satu pilihan rekayasa kendali aktif aliran yang dapat diterapkan pada desain kendaraan yang dapat mengendalikan pembentukan separasi aliran dan berefek positif berupa pengurangan hambatan aerodinamis. Penelitian ini bertujuan menganalisis pengaruh penerapan blowing terhadap pola aliran, distribusi tekanan, dan hambatan aerodinamika yang bekerja pada bagian belakang model. Dengan bantuan CFD Fluent 6.3, model uji yang digunakan adalah model kendaraan dengan sudut kemiringan geometri depan (α) 35o dan rasio terhadap model Ahmed bodi original adalah 0.17 (1:6), yang dilengkapi dengan blowing dengan kecepatan 1.0 m/s. Hasil komputasi mengindikasikan bahwa penerapan blowing dapat mengurangi pembentukan wake dan menunda separasi aliran dan dapat meningkatkan koefisien tekanan minimum pada bagian belakang model kendaraan sebesar 24.690%. Pengurangan hambatan aerodinamika diperoleh sebesar 9.583%.

ANALISA DIAGRAM FUNDAMENTAL RUAS JALAN POROS PINRANG-POLMAN Muhammad Ihsan; Suryani Syahrir; Eris Nur Dirman; Ariandi Ariandi; Sarif Sarif
JURNAL SIPIL SAINS Vol 9, No 17 (2019)
Publisher : Program Stud Teknik Sipil Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/sipilsains.v9i17.1090

Penelitian ini mencoba menganalisa karakteristik lalu lintas jalan pada ruas Pinrang-Polman KM.15 dan membandingkan dengan model fundamental kecepatan-arus-kerapatan sebagaimana yang diusulkan oleh Greenshield, Greenberg dan Underwood. Hasil pengamatan menunjukkan nilai yang lebih mendekati model Greenshields dan Underwood dibandingkan model Greenberg

Pemodelan Perubahan Garis Pantai Ujung Tape Kabupaten Pinrang Irwan Irwan; Muhammad Ihsan
Jurnal Teknik Sipil : Rancang Bangun Vol. 6 No. 1 (2020): April 2020
Publisher : Universitas Muhammadiyah Sorong

Penelitian ini bertujuan untuk mengetahui magnitudo erosi dan sedimentasi garis pantai Ujung Tape dalam proyeksikan lima tahunan dan di mana letak bangunan pelindung pantai yang bisa diterapkan di lokasi tersebut. Metode penelitianÂ yang digunakan adalah memodelkan gelombang dan garis pantai pada software STWAVE dan GENESIS yang berbasis model numerik. Kalibrasi model dilakukan dengan memodelkan garis pantai terukur (measured shoreline) dan garis pantai awal (initial shoreline) untuk mendapatkan koefisien kalibrasi (k1 dan k2). Nilai k1 dan k2 yang memiliki kesalahan error (Æc) yang terkecil dan memiliki tren yang lebih mendekati perubahan garis pantai di lokasi digunakan sebagai variabel bebas terpilih untuk mensimulasikan garis pantai dalam lima tahun ke depan. Simulasi garis pantai juga dilakukan dengan penambahan model bangunan pelindung pantai yaitu pemecah gelombang (skenario A dan B). Hasil simulasi dari tahun pertama sampai tahun kelima menunjukkan garis pantai dominan mengalami erosi walaupun di beberapa grid mengalami sedimentasi. Sel grid ke 480 sampai 2640 mengalami erosiÂ dimana yang terbesar adalah sel grid ke 1540 dengan erosi -7331.99 m3. Perubahan garis Pantai Ujung Tape dari tahun pertama sampai tahun kelima menunjukkan pantai dominan mengalami erosi dengan volume angkutan sedimen sebesar â€“462.863 m3. Bentuk perlindungan garis pantai Ujung Tape yang dapat mencegah erosi adalah melalui model breakwater skenario A dan BÂ dengan tangkapan sedimen sebesar 509.583 m3/tahun (skenario A) dan 463.370 m3/tahun (skenario B).

Kajian Aerodinamika Pada Model Kendaraan dengan Penerapan Kontrol Aktif Suction Rustan Tarakka; Nasaruddin Salam; Jalaluddin Jalaluddin; Wawan Rauf; Muhammad Ihsan
METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 1 (2021): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

As the air flow reaches the rear part of the vehicle the flow will undergo separation generated by friction and fluid viscosity, and creating wake, considerably large turbulent area with low pressure at the rear of the vehicle which results in pressure drag which can reduce vehicle performance. The research was carried out with a computational and experimental approach. The test model used in this study is a model of a family van model which is a modification of the Ahmed body model. The rear part of the vehicle model is equipped with an active control feature in the form of a suction with a slant angle (α) of 35°. The upstream speed and suction speed are 11.1 m/s and 0.5 m/s, respectively. The results obtained indicate that the application of active suction control is able to reduce wake formation and delay flow separation compared to the uncontrolled model, and is able to increase the minimum pressure coefficient on the rear wall of the vehicle model with an increase of 41.49%, and is able to reduce the drag coefficient by 11.0260% for the approach. computation and 11.0080% for the experimental approach.

Economic value and environmental impact of Saddang River sand mining, Pinrang Regency, South Sulawesi, Indonesia Arsyad, Arsyad; Rukmana, Didi; Salman, Darmawan; Alimuddin, Ilham; Arifin, Muh. Aris; Jamaluddin, Jamaluddin; Hamzah, Hamzah; Nurdirman, Eris; Ihsan, Muh.; Bauna, Ruslan; Reno, Reno; Tinta, Yulis
Journal of Degraded and Mining Lands Management Vol. 11 No. 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.112.5495

This research aimed to determine the social, economic, and environmental impact of Saddang River sand mining on local communities and the Pinrang district government. Primary data collection used field surveys to obtain supporting data on economic aspects consisting of production capacity, costs, selling price of sand at the miner level and market price at the consumer level, number of grains, and various other economic values such as indirect value and indirect use value. The primary data collection method uses a total sampling of 80 miners operating in the research area. Consumer data uses a field survey method with 8 hours of observation per day. Saddang River sand mining provides great socio-economic value and environmental impact, directly or indirectly. This significant socio-economic value and impact, if not accompanied by good management, can result in over-exploitation, which impacts the physical and ecological damage of the Saddang River. On the other hand, the high rate of sedimentation from upstream of the Saddang River results in shallowing, so sand mining activities help normalize the Saddang River. Therefore, to continue providing economic benefits and the Saddang River to avoid physical and ecological damage due to mining activities, sustainable management of Saddang River sand mining is needed.

INVESTIGASI SIFAT TERMAL PERMUKAAN PERKERASAN JALAN Ihsan, Muhammad; Kushari, Berlian; Suparma, Latif Budi; Kanitpong, Kunnawee
JURNAL SIPIL SAINS Vol 12, No 1 (2022)
Publisher : Program Stud Teknik Sipil Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/sipilsains.v12i1.4225

Setiap permukaan perkerasan memiliki sifat yang berbeda-beda yang berpengaruh terhadap lingkungan sekitarnya. Tujuan dari penelitian ini adalah untuk memahami sifat termal dari permukaan perkerasan, seperti profil albedo dan temperatur serta memberikan pertimbangan dalam mengembangkan perkerasan sejuk. Empat jenis permukaan perkerasan yang digunakan, aspal hot mix baru, aspal hot mix lama, chip seal dan permukaan perkerasan beton semen portland. Nilai albedo diselidiki dengan menghitung rasio radiasi yang datang danÃ‚Â yang dipantulkan. Profil suhu diselidiki dengan perekaman menerus menggunakan thermocouple. Hasil penelitian menunjukkan bahwa terdapat hubungan negatif antara albedo dengan temperatur dimana semakin tinggi albedo maka semakin rendah temperatur permukaan perkerasan.

Characteristics Of Saddang River Sand, Pinrang Regency, South Sulawesi, Indonesia Based On Grain Gradation, Mud Content And Specific Gravity Arsyad; Arifin, Moch. Aris; Mukrim, Muh. Ihsan; Jamaluddin; Hamzah; Rauf, Abd.; Bauna, Ruslan; Reno; Nurhikmah; Abdul Latif
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.18019

The research aims to determine the characteristics of sand grain gradation, mud content and specific gravity of Saddang River sand. Saddang river sand is the main source of sand used in construction activities in South Sulawesi and West Sulawesi. In order to ensure that Saddang river sand meets the quality standards used in the construction world, it is necessary to conduct research related to Gradation of grains, mud content and specific gravity of sand. These three factors are part of the factors that determine the quality of concrete and cement mixtures. The research was located at the Saddang River sand mine in Pincara Village, Patampanua subdistrict, Pinrang Regency, South Sulawesi, Indonesia. The research method uses field surveys and laboratory analysis to analyze the gradation of sand grains, mud content and specific gravity. The results of the sieve analysis show that the Saddang River sand is classified as gradation zone no. 4 or classified as fine sand based on the fine aggregate gradation table SNI 03-2834-2000 and ASTM C-33. The results of the analysis of the Saddang River sand mud content ranged from 2.233% to 2.250%, fulfilling SNI 03-4804-1998 which has been determined at a maximum of 5%. The specific gravity analysis show the average value of bulk specific gravity (2,489 gr/m3), dry specific gravity (2,524 gr/m3), and visible specific gravity (2,600 gr/m3). meets SNI 03-1970-2008 standards ranging from < 1.6 gr/m3 to 3.2 gr/m3. The ater absorption in fine aggregate ranged from 1.5% to 3.8%, meeting SNI 03-1970-2008 with a maximum of 5%.

ASSESSMENT OF CARBON EMISSIONS FROM THE WASTE MANAGEMENT SECTOR IN AJATAPPARENG REGION, SOUTH SULAWESI, INDONESIA Rahim, Irwan Ridwan; Sari, Kartika; Mukrim, Muhammad Ihsan Mukrim; Iman, Alfiyah Zhafirah; Taweesan, Achara; Swe, Zin Aung
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 2, OCTOBER 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i2.24071

Ajatappareng is a region in South Sulawesi Province, Indonesia which consists of four regencies and one administrative city. The regencies are Barru, Sidenreng Rappang, Pinrang, and Enrekang while the city is Parepare. The area has experienced a significant growth in terms of population which further leads to an increase in waste generation. Waste are a major challenge for environmental management especially due to the role in producing carbon emissions. Aim: This study aims to assess the carbon emissions produced in waste management sector of the Ajatappareng Region. Methodology and results: The GHG Simulation-Version II spreadsheet was used to assess the GHG emissions from the transportation of waste in the respective regencies. Mathematical formulas were provided in the cells to calculate the GHG emissions of the simulation developed. Conclusion, significance, and impact study: The results showed that the volume of carbon emissions was 16,299.84 kg CO2-eq/month for Barru Regency, 17,076.03 kg CO2-eq/month for Sidrap Regency, 16,817.30 kg CO2-eq/month for Parepare City, 17,722.85 kg CO2-eq/month for Pinrang Regency, and 19,145.85 kg CO2-eq/month for Enrekang Regency. Moreover, the GHG emissions from mixed waste in the final disposal site were 918,531.01 kg CO2-eq/month, 1,733,537.85 kg CO2-eq/month, 1,404,917.59 kg CO2-eq/month, 1,723,004.12 kg CO2-eq/month, and 523,506.36 kg CO2-eq/month, respectively. Therefore, potential efforts are required to reduce CO2 emissions by optimizing waste transportation, promoting recycling, managing organic waste through composting, as well as improving collaborations with the private sector.

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