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All Journal Jurnal Riset Kimia Forum Geografi Jurnal Sains & Teknologi Modifikasi Cuaca Buletin GAW Bariri ( BGB) Mitra Sains
Alfiandy, Solih
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Agriculture, Biological Sciences & Forestry Astronomy Chemistry Computer Science & IT Earth & Planetary Sciences Education Environmental Science

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Analisis Kimia dan Kualitas Air Hujan di Kota Palu Sebagai Penyebab Terjadinya Hujan Asam Alfiandy, Solih; Permana, Donaldi Sukma; Nugraha, Muharam Syam; Aulia Putri, Isna Jutika
Jurnal Riset Kimia Vol 12, No 1 (2021): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i1.368

Abstract

Acidic compounds such as sulfur dioxide (SO2) and nitrogen oxides (NOx), which are generally emitted into the atmosphere by human activities from burning fossil fuels, motor vehicles and industry, react with water and oxygen to produce acidic rain that falls to the earth's surface. This study aims to investigate the quality of rainwater chemical compounds at the Mutiara Palu Meteorological Station using 282 samples derived from the BMKG Air Quality Database during February 1993 – January 2020. The method used are descriptive analysis and correlation analysis to determine the relationship between chemical compound reactions that occur in the rainwater in Palu City. The results showed that the chemical compounds in rainwater in Palu City were dominated by strong acid compounds in the form of Cl-, SO42-, and NO3- compounds with a percentage of 63% and the most dominant quality was in the acidic rain category with a pH value below 5.6, as much as 55.7%. Chemical compounds contained in rainwater in Palu City are mineral compounds that originated from natural form of minerals, particularly from sea salt. The relationship between chemical compounds contained in rainwater has varied values and is in the low to moderate category. In general, the results indicate that the quality of rainwater in Palu City is low and not recommended for health and the environment.
GIS-based Flood Susceptibility Mapping Using Overlay Method in Central Sulawesi Hutauruk, Rheinhart Christian; Alfiandy, Solih; Nainggolan, Hermanto Asima; Raharjo, Mas Harya Fitra Yudo
Forum Geografi Vol 34, No 2 (2020): December 2020
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v34i2.10667

Abstract

Central Sulawesi is the largest province on the Sulawesi island with a dominant sloping topographic condition and has a variety of soil types, flow density, land use and rainfall that makes this region vulnerable to flooding. Flooding is a hydrometeorological disaster that will adversely affect aspects of human life such as social and economic activities in an area because it can cause environmental damage, casualties and disrupt economic activity. Because of its enormous impact, the purpose of this research study is to find out areas in the province of Central Sulawesi that are suscept to flooding. The method used in this research study is scoring the classification of flood hazard parameters such as slope level, elevation, soil type, rainfall, land use and flow density which are then overlay using ArcGis 10.2.2. The results obtained that the province of Central Sulawesi has three categories of areas suscept to flooding with a low category 6630.3 km2, moderate 46081.9 km2 and high category 7104.7 km2. Based on the results and discussion, it can be concluded that Central Sulawesi province has a dominant level of vulnerability which is moderate.
TREN CURAH HUJAN BERBASIS DATA SINOPTIK BMKG DAN REANALISIS MERRA-2 NASA DI PROVINSI SULAWESI TENGAH Alfiandy, Solih; Permana, Donaldi Sukma
Jurnal Sains & Teknologi Modifikasi Cuaca Vol. 21 No. 2 (2020): December 2020
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jstmc.v21i2.4132

Abstract

Perubahan iklim dapat mempengaruhi perubahan pola dan intensitas curah hujan. Kajian iklim di Provinsi Sulawesi Tengah sangat penting dilakukan sebagai bahan pertimbangan dalam pengambilan kebijakan di bidang pertanian dan sektor lainnya. Penelitian ini bertujuan untuk mengetahui tren perubahan total curah hujan dan kejadian hujan ekstrem di Provinsi Sulawesi Tengah berdasarkan data dari stasiun sinoptik BMKG dan model reanalisis The Modern-Era Retrospective Analysis for Research and Applications Version 2 dari The National Aeronautics and Space Administration (MERRA-2 NASA) periode 1980-2017. Hasil menunjukkan bahwa kedua data memiliki kemiripan pola musim hujan dan hubungan korelasi positif yang signifikan dengan nilai koefisien determinasi (R2) sebesar 0,59-0,78 kecuali kota Palu dengan R2 = 0,14. Hal ini menunjukkan bahwa data MERRA-2 berpotensi untuk mengisi data kosong yang terdapat pada stasiun sinoptik BMKG di masa lalu. Selain itu, kedua data menunjukkan tren peningkatan total curah hujan, tren penurunan jumlah hari hujan <5 mm/hari, dan tren peningkatan jumlah hari hujan >50 mm/hari (ekstrem) per tahun. Tren peningkatan total hujan tahunan berkisar antara 4,68-52,40 mm/tahun dengan tren tertinggi terjadi di Kabupaten Poso, sebagian Kabupaten Sigi, Tojo Una-Una, Morowali Utara dan Morowali. Sedangkan tren terendah terjadi di Kabupaten Banggai, Banggai Kepulauan dan Banggai Laut. Tren peningkatan curah hujan bulanan tertinggi terjadi pada bulan April di Poso (4,8 mm/tahun), bulan Januari di Toli-Toli (3,6 mm/tahun) dan bulan Juni di wilayah Luwuk Banggai (2,8 mm/tahun) serta Palu (4,1 mm/tahun). Informasi ini dapat digunakan sebagai bahan pertimbangan dalam kebijakan terkait adaptasi dan mitigasi perubahan iklim di Provinsi Sulawesi Tengah.
Identifikasi Klasifikasi Jenis Tanah Berdasarkan Nilai Kecepatan Gelombang Geser Vs30 di Daerah Bekasi Rahman, Aditya Setyo; Sutiyono, Sutiyono; Cindiwati, Cindiwati; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.121

Abstract

The complex geological and tectonic conditions of Bekasi are interesting to study the soil layers for sustainable development. This research was conducted to analyze soil types in the Bekasi area based on the USGS topographic Vs30 value. The data used were 613 research location points with a distance of approximately 1 km. The results showed that the Vs30 value in the Bekasi area ranged from 125.5479965 m/s to 316.0310059 m/s. Based on SNI 1726:2019, the entire Bekasi area is classified as soft to medium soil types. The majority of all sub-districts in Bekasi have a soft soil type classification, such as in the areas of Muaragembong, Cabangbungin, Babelan, Tarumajaya, Tambelang, Sukatani, Pebayuran, Kedung Waringin, and parts of Tambun. The medium soil type classification is in the southern part of Tambun sub-district, a small part in the southern part of Tambelang and Sukatani sub-districts, and a small part in the north and south of Muaragembong sub – district.
Analisis Potensi Pergerakan Tanah Berdasarkan Ground Shear Strain Untuk Wilayah Bekasi Rahman, Aditya Setyo; Sutiyono, Sutiyono; Wardaningsih, Kuurnia; Istofiyah, Istofiyah; Cindiwati, Cindiwati; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.122

Abstract

This study analyzes the Ground Shear Strain (GSS) values and predicts earthquake vibration phenomena in the Bekasi area. The results show that the GSS values are relatively low (0.14 - 0.20), indicating a low level of vulnerability to earthquake shaking. At PGA 0.22 - 0.302 g, it is predicted that only the wave vibration phenomenon will occur (ground vibration is felt, not damaging). Despite the low vulnerability level, it is important to remain vigilant and carry out earthquake mitigation, such as building earthquake-resistant structures and preparing evacuation plans.
Kajian Awal : Prediksi Kabut Berdasarkan Data Observasi di Wilayah Bandara Zainuddin Abdul Madjid Dewita, Anggi; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.135

Abstract

The reduction in visibility due to wet particles (fog and mist) is a phenomenon that can occur at Zainuddin Abdul Madjid Airport (ZAM). This event is quite difficult to predict using NWP models because the physical processes involved in its formation are very complex. This study aims to determine the threshold parameters that can be used as a forecasting guide to predict the occurrence of fog. The data used is from January 2024, with parameters assessed from METAR, AWOS, and Fklim71, including wind speed, temperature, dew point, cloud cover, and maximum temperature. The threshold values for each parameter will be determined and tested using a dichotomous verification method to obtain the accuracy value. Based on the analysis, fog in January 2024 formed early in the morning if there was precipitation during the afternoon, with the average wind speed at night being < 1 knot, the temperature difference between maximum temperature and air temperature after sunset being > 4.5°C, and the dew point depression at 17:00 UTC being below 1°C. In January 2024, a dichotomous verification was carried out, and the result showed an accuracy of 87%. Forecasting using this method is not 100% accurate.
Analisis Nilai Percepatan Tanah Maksimum dan Klasifikasi Kelas Situs di Kota Serang Provinsi Banten Widjayanti, Retno Yogi; AL HS, Usholl Auli; Rahman, Adtya Setyo; Permana, Dimas; Alfiandy, Solih
Buletin GAW Bariri (BGB) Vol 6 No 1 (2025): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v6i1.128

Abstract

Serang City exhibits a high level of seismic vulnerability due to its tectonic position near the convergent boundary between the Indo – Australian and Eurasian plates. Additionally, the local geological conditions, which are dominated by alluvial deposits, make seismic waves more susceptible to amplification and resonance, thereby increasing earthquake hazard potential. The objective of this research is to identify site class characteristics and calculate surface PGA values to assess seismic threat levels in the urban area. The data used include ground acceleration values from microzonation maps, local geological information, and regional seismic parameters. The analysis was conducted by classifying site conditions based on the average shear wave velocity to a depth of 30 meters (Vs30), and by estimating surface PGA values using local amplification factors. The results indicate that most areas of Serang City are classified as SE site class (soft soil), followed by SD site class (medium soil), predominantly in the southwestern part of the city. Surface peak ground acceleration values range from 0.84 to 0.91 g, which are considered very high. These findings suggest that all six districts in Serang City–Serang, Cipocok Jaya, Taktakan, Curug, Kasemen, and Walantaka–are at significant seismic risk in the event of an earthquake. Therefore, appropriate risk mitigation strategies are essential, including the reinforcement of spatial planning systems, the design of earthquake – resistant structures, and the development of more detailed seismic microzonation maps.
Perspektif Masyarakat Sulawesi Tengah terhadap Isu dan Dampak Perubahan Iklim Alfiandy, Solih; Hamid, Syarwan; Ilahi, Asep Firman; Sunardi, Sunardi
Buletin GAW Bariri (BGB) Vol 6 No 1 (2025): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v6i1.152

Abstract

Limited public understanding and perception of climate change indicate that adaptive capacity at the local level remains constrained. This study aims to examine the perceptions, awareness, and engagement of Central Sulawesi communities regarding climate change. A mixed-mode survey—offline and online—was conducted using a questionnaire with 14 structured items and an open-ended essay prompt for additional suggestions. From the sampled respondents drawn from the entire population of Central Sulawesi, the Margin of Error (MoE) was calculated at 7.92%, with a confidence level of 92.08%. The findings reveal that 96% of participants are aware of climate change, although only a small proportion consider themselves well-informed. Furthermore, 75% regard climate change education as highly important, and 96% identify social media as an effective means for disseminating climate knowledge. Moreover, 43% of respondents believe climate change significantly affects their lives, and 45% express concern about its impacts. A majority support mitigation efforts, endorsing reforestation and educational programs as priority strategies. While public awareness appears relatively high, a gap persists between knowledge and tangible action. These insights highlight community readiness—and existing limitations—for supporting local-level climate change interventions.
Information Potential of Changses on Agroclimate Zonation in Palu Valley Central Sulawesi Alfiandy, Solih; Hadid, Abdul; Syakur, Abdul
Mitra Sains Vol 9 No 2 (2021): September
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/ms26866579.2021.v9.i2.pp103-113

Abstract

The information of agroclimate zonation according by Oldeman and Schmidt – Ferguson, and the potential of changes has never been done before. So, the purpose of this study is to determine the potential of agroclimate zonation changes according by Oldeman and Schmidt – Ferguson in the Palu Valley Central Sulawesi. The method used in this study is by counting the number of wet and dry months based on observation and prediction data results using ANN. The results of zonation according by Oldeman and Schmidt – Ferguson show that 2 points have the potential to changes and 2 points are fixed. The zonation by Oldeman at the Stageof Palu which was originally type E5 changes to E2 and Tawaili from E5 changes to E3, then based on Schmidt – Ferguson at Stageof Palu which was originally type F changes to E and Tawaili from F changes to D. This research found that the potential for agroclimate zonation of changes according to Oldeman and Schmidt Ferguson in the upcoming period has the potential will changes towards wetness due to the increasing number of humid and wet months, and the decreasing number of dry months.
Co-Authors Abdul Hadid Abdul Syakur AL HS, Usholl Auli Asep Firman Ilahi, Asep Firman Aulia Putri, Isna Jutika Cindiwati, Cindiwati Dewita, Anggi Dimas Permana Donaldi Sukma Permana Hamid, Syarwan Hutauruk, Rheinhart Christian Istofiyah, Istofiyah Nainggolan, Hermanto Asima Nugraha, Muharam Syam Raharjo, Mas Harya Fitra Yudo Rahman, Aditya Setyo Rahman, Adtya Setyo Sunardi Sunardi sutiyono sutiyono Wardaningsih, Kuurnia Widjayanti, Retno Yogi