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The Application of Modal Split Using Revealed and Stated Preference Techniques: A study in Malang Hidayat, Muhammad Nurjati
Civil and Environmental Science Journal (CIVENSE) Vol 1, No 1 (2018)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2018.00101.5

Abstract

In this study we investigate modal split and travel behaviour in Malang by conducting person trip survey in study area. The purpose is to understand respondents’ travel behaviour and their preferences in selecting mode of transport. This is carried out to understand what are respondents feel regarding their perception on mode of transportation that available to them. The data being used are Revealed Preference (RP) and Stated Preference (SP) data. The first data based on present situation of respondents (including respondents’ characteristics and daily travel information), while the second one is hypothetical scenario that has not available in present condition. These data then compared and analysed using Multinomial Logit Model (MNL).
Inspections of Hydro-Geotechnical on Ngancar Dam asmaranto, runi; Suryono, Antonius; Hidayat, Muhammad Nurjati
Civil and Environmental Science Journal (CIVENSE) Vol 2, No 2 (2019)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2019.00202.5

Abstract

Besides having great benefits, dam also holds enormous potential dangers. The collapsed dam will cause devastating flood along the river resulting in loss of lives, properties, damage to public facilities and environment, especially in the downstream area. For safety and prevent the occurrence of the disaster, the operational of dam should always be monitored, inspected and maintained properly continually. With a good monitoring, dam managers will discover as early as possible the problems emerging in the dam, and then perform the appropriate steps to prevent the development of the problems. This paper will perform hydro-geotechnical analysis as a review current condition of slope stability based on the result of soil investigation on present dam condition and review instrumentations installed in Ngancar Dam
Studi Material Tanah Longsor Akibat Gempa Lombok 2018 Muhammad Nurjati Hidayat
TERAS JURNAL Vol 10, No 2 (2020): Volume 10 Nomor 2 September 2020
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v10i2.330

Abstract

Abstrak Pada umumnya, tanah longsor terjadi dengan skala yang kecil dan dampak yang dihasilkan tidak parah sebagaimana letusan gunung berapi, gempa atau tsunami. Namun, perhatian terhadap bencana ini seringkali diabaikan oleh masyarakat dan perencanaan pembangunan kota. Ada beberapa faktor yang perlu diperhatikan dalam meneliti tanah longor, salah satunya adalah mineral tanah. Dalam studi ini, sampel tanah diambil dari Lombok Utara akibat dari gempa Lombok 2018. Penelitian ini dilakukan dengan mengelompokkan tanah berdasarkan USCS dan AASTHO, kemudian dilanjutkan dengan analisis mineralogi menggunakan XRD (X-Ray Diffraction) dan SEM (Scanning Electron Microscope). Berdasarkan klasifikasi USCS, tanah termasuk kategori pasir berlanau dan campuran lanau (SM); dan lempung anorganik dengan plastisitas rendah sampai sedang, lempung berkerikil, lempung berpasir, lempung berlanau, lempung kurus (lean clays). Pada klasifikasi AASHTOO, hasilnya adalah tanah berlanau (A-4); kerikil dan pasir yang berlanau atau berlempung (A-2-4); dan pasir halus (A-3). Berdasarkan hasil mineralogi menggunakan XRD dan SEM, material utama pada sampel tanah adalah Albite Calcian, Microline and Kuarsa. Kata kunci: longsor, mineralogi, XRD, SEM  Abstract Landslides generally occur on a small scale and the impact is not as severe as volcanic eruptions, earthquakes, or tsunamis. However, attention to these disasters is often ignored by the community and city development planning. In assessing the factors causing landslides there are many factors that need to be considered, one of which is soil minerals. The samples of soil in this study were taken from North Lombok as a result of the 2018 earthquake. This research is conducted by classifying the soil based on USCS and AASHTO, then proceed with mineralogical analysis using XRD (X-Ray Diffraction) and SEM (Scanning Electron Microscope). Based on USCS classification, the result of the analysis shows that soil samples have a classification of silty sand, and silt mixtures (SM); and inorganic clays or low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clays (CL). For AASHTO classification, the result shows the sample belong to silty soil (A-4), silty or clayey gravel sand (A-2-4) and fine sand (A-3). Based on the results of mineralogical analysis using XRD and SEM, it is known that the dominant minerals making up the soil in the sample are Albite Calcian, Microline and Quartz Keywords: landslide, mineralogy, XRD, SEM