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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

Groundwater Pumping Management in Controlling Seawater Up-Coning in The North Coastal Area of Makassar Sugiarto Badaruddin; Akhmad Azis; Muhammad Fadhil Ashari; Miftahul Jannah; Ilham Ali; Muhammad Ihsan
INTEK: Jurnal Penelitian Vol 7, No 2 (2020): October 2020
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v7i2.2634

In big cities, communities generally consume clean water from local water supply company which uses surface water sources. However, due to the limitations of the company in supplying water, particularly in the dry season, an alternative is required, such as using groundwater without causing over-exploitation. This study aims to determine the optimal rate of groundwater pumping in the coastal aquifer to avoid seawater up coning using SEAWAT V.4 numerical model. The research method was carried out using a GEO-7X GPS device to obtain coordinate's location, land elevation and observation well distance from the coastline. Secondary data in the form of aquifer thickness data and geological map of the site were obtained from previous studies. The salinity test results show that the average salinity value of the ten water samples from observation wells is 36.8 mg/l, which means that the water is categorized as non-saline water (freshwater). These data are in line with the groundwater utilization monitoring activity report of Makassar City Environment Office in 2018, which reported that Ujung Tanah and Wajo Districts were found to be free from seawater intrusion. Even so, the potential for seawater intrusion is still considered high because of the location of community groundwater wells are near from the coast. One of the efforts to prevent seawater up coning is by limiting groundwater pumping. From the numerical modeling results, it is found that the maximum groundwater discharge in the research site, namely P3 is 20% of total flow rate(0.3 m3/day), P5 is 20% (1.32 m3/day), P6 is 40% (0.52 m3/day) and P10 is 20%(0.63 m3/day).

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.

Analysis of Organic Waste Management of Central Market Pinrang Regency Arsyad Arsyad; Moh. Aris Arifin; Ihsan Mukrim; Jamaluddin Jamaluddin; Hamzah Hamzah; Eris Nur Dirman; Reno Reno; Abd. Rauf; Ruslan Bauna
Indonesian Journal of Applied and Industrial Sciences (ESA) Vol. 3 No. 5 (2024): September 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/esa.v3i5.10858

Waste is the result of human activities or natural processes. One of the largest sources of waste in urban areas is market waste which can cause public health problems and city aesthetics. The generation of market waste is quite large so that good management is needed so that market waste does not cause problems for city residents. The research method used is descriptive with an observational approach. Sampling was done by stratified random sampling, with a sample size of 230 traders. Data collection was carried out using an observation sheet in the form of a checklist. The results showed that out of 230 traders, 5.2% of traders had containers that met the requirements and 94.8% of traders were in the category of not meeting the requirements. Meanwhile, for storage, 18.7% met the requirements and 81.3% did not meet the requirements. For collection, 31.3% met the requirements and 68.7% did not meet the requirements, while for transportation, 91.7% met the requirements and 8.3% did not meet the requirements. Therefore, traders should replace damaged containers and related agencies should optimize waste management at the Pinrang Central Market

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.

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