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All Journal Journal of Science and Applicative Technology International Journal of Natural Science and Engineering International Journal of Remote Sensing and Earth Sciences (IJReSES) Jurnal Teknologi Lingkungan Lahan Basah
Hilman, Zaki
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Public Health

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APPLICATION OF LAND SURFACE TEMPERATURE DERIVED FROM ASTER TIR TO IDENTIFY VOLCANIC GAS EMISSION AROUND BANDUNG BASIN Hilman, Zaki; Saepuloh, Asep; Susanto, Very
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 16, No 2 (2019)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.454 KB) | DOI: 10.30536/j.ijreses.2019.v16.a3254

Abstract

Gas emission in volcanic areas is one of the features that can be used for geothermal exploration and to monitor volcanic activity. Volcanic gases are usually emitted in permeable zones in geothermal fields. The use of thermal infrared radiometers (TIR) onboard of advanced spaceborne thermal emission and reflection radiometers (ASTER) aims to detect thermal anomalies at the ground surface related to gas emissions from permeable zones. The study area is located around Bandung Basin, West Java (Indonesia), particularly the Papandayan and Domas craters. This area was chosen because of the easily detected land surface temperature (LST) following emissivity and vegetation corrections (Tcveg). The ASTER TIR images used in this study were acquired by direct night and day observation, including observations made using visible to near-infrared radiometers (VNIR). Field measurements of volcanic gases composed of SO2 and CO2 were performed at three different zones for each of the craters. The measured SO2 concentration was found to be constant over time, but CO2 concentration showed some variation in the craters. We obtained results suggesting that SO2 gas measurements and Tcveg are highly correlated. At Papandayan crater, the SO2 gas concentration was 334.34 ppm and the Tcveg temperature was 35.67 °C,  results that are considered highly anomalous. The same correlation was also found at Domas crater, which showed an increased SO2 gas concentration of 35.39 ppm located at a high-anomaly Tcveg of 30.65 °C. Therefore, the ASTER TIR images have potential to identify volcanic gases as related to high Tcveg.
Problematika Sampah di Sektor Perjalanan dan Pariwisata: Kajian Literatur Hilman, Zaki; Awfa, Dion; Fitria, Laili; Suryawan, I Wayan Koko; Prayogo, Wisnu
Jurnal Teknologi Lingkungan Lahan Basah Vol 11, No 3 (2023): Oktober 2023
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v11i3.72509

Abstract

Perjalanan dan pariwisata telah tumbuh secara signifikan dalam sepuluh tahun terakhir, menjadinya salah satu sektor ekonomi dengan pertumbuhan tercepat di tingkat global. Namun di lain sisi banyak penelitian telah menyebutkan adanya kemungkinan hubungan antara jumlah sampah yang dihasilkan di berbagai destinasi wisata dengan jumlah pengunjung. Kajian ini menjabarkan secara rinci tentang masalah yang timbul akibat sampah di sektor wisata, termasuk sumber asalnya dan potensi pengelolaannya dari apa yang sudah dipraktikan saat ini. Pihak yang mendukung kegiatan pariwisata, sampah dari para wisatawan, dan sampah dari pengelolaan pariwisata adalah beberapa sumber yang teridentifikasi dimana sampah dihasilkan yang jika pengelolaannya tidak dilakukan dengan tepat maka dapat mengancam kualitas lingkungan. Sampah plastik dapat diolah secara mekanis, kimia, atau biologis, tergantung tujuan akhirnya, budget, ketersediaan teknologi untuk pengolahan, sumber daya manusia sebagai eksekutor, dan banyak pertimbangan lainnya. 
Groundwater Quality Analysis Based on Physical Properties of The Gunungtiga and Surrounding Areas Hilman, Zaki; Widiatama, Angga Jati; Awfa, Dion; Alfarishi, Bilal; Prayogo, Wisnu; Depri
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.67866

Abstract

Gunungtiga area has never been studied for the quality of groundwater, and residents have also complained about the quality of groundwater, these became the basis for selecting the research location. This study aims to analyze groundwater quality in the Gunungtiga Region, Lampung Province. Quantitative approached was used for this research, it was carried out by mapping the groundwater level to estimate the recharge area and collecting data on parameters of the physical properties of groundwater, including color, taste, odor, temperature, pH, TDS, and EC.  The physical properties approach was selected because it is relatively cheap and easy to observe, the data collection can also be done in situ. The physical property parameter data is then checked based on the Republic of Indonesia Minister of Health Regulation No. 492 of 2010. The observations at 14 points showed that the groundwater level in the research area is relatively shallow towards the west or in the direction with higher topography, so it can be interpreted as a recharge area, and it flowed towards the east area which has lower topography. The physical properties of the groundwater had no taste, odor, or color. The EC value ranges from 188.07 to 1066.82 µs/cm, including fresh water, the pH ranges from 5.41 to 7.5, the temperature ranges from 27.2 to 29.7 0C, and the TDS value ranges from 94. 04-542.91 mg/l. Of the 14 observation points, only 1 location met the quality standards, namely 22/DP/02. Treatment is required before groundwater can be used, such as filtering.
Mineralogical Characteristics and Critical Stress Variation in Rock Samples from Bukit Kunyit, Bandar Lampung Setiawan, Muhamad Ragil; Hilman, Zaki; Haqiqi, Rian Bayu; Farishi, Bilal Al
Journal of Science and Applicative Technology Vol. 9 No. 1 (2025): Journal of Science and Applicative Technology June Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v9i1.2026

Abstract

Mineralogy is essential for understanding rock formation processes and their physical properties, including critical stress. Critical stress values can be estimated using unconfined compressive strength (UCS) measurements, which depend on the modulus values of the minerals present. This study explores the mineralogical characteristics of rock samples from Bukit Kunyit, Bandar Lampung City, and Lampung through X-ray diffraction (XRD) and petrographic analysis. Macroscopic observations revealed two visually distinct rock samples: one with a bright color (Sample 1) and another with a darker hue (Sample 2). Despite these color differences, XRD analysis showed that both samples have the same mineral composition, including Anorthoclase, Cristobalite, Tridymite, and Muscovite, indicating a felsic (silica-rich) nature. Differences were noted in the crystallographic forms of Muscovite and Quartz content, with Sample 2 having a higher Quartz concentration. These mineralogical variations correlate with the observed differences in critical stress, with Sample 1 exhibiting a lower critical stress (20.98 MPa) than Sample 2 (35.05 MPa).
Co-Authors Alfarishi, Bilal Asep Saepuloh Depri Dion Awfa Farishi, Bilal Al Fitria, Laili Haqiqi, Rian Bayu Prayogo, Wisnu Setiawan, Muhamad Ragil Suryawan, I Wayan Koko Susanto, Very Widiatama, Angga Jati