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All Journal Bulletin of Scientific Contribution : Geology Journal of Geosciences and Applied Geology
Alam, Boy Yoseph Cahya Sunan Sakti Syah
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science

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Journal : Bulletin of Scientific Contribution : Geology

 1 
Identifikasi Gerakan Tanah (Longsor) di Kabupaten Garut, Jawa Barat Sabila, Zahra Syahida; Sukiyah, Emi; Alam, Boy Yoseph Cahya Sunan Sakti Syah; Zakaria, Zufialdi
Bulletin of Scientific Contribution Vol 16, No 1 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (940.793 KB) | DOI: 10.24198/bsc.v16i1.16779

Abstract

Wilayah Kabupaten Garut, Provinsi Jawa Barat merupakan bagian dari zona gerakan tanah di Indonesia bagian barat. Indonesia bagian barat dibentuk akibat  pengaruh tumbukan dua lempeng tektonik yaitu Indo-Australia dan Eurasia. Zona tersebut juga merupakan zona gempa dan zona gunungapi. Tanah residu yang tebal pada lereng dan curah hujan yang cukup tinggi di Jawa Barat merupakan salah satu penyebab daerah rawan longsor. Hal ini menjadi kendala bagi pengembangan wilayah Kabupaten Garut. Potensi gerakan tanah (longsor) pada daerah berlereng di Kabupaten Garut perlu mendapatkan perhatian. Sistem peringatan dini diperlukan untuk mengurangi  potensi  kebencanaan geologi gerakan tanah sehubungan dengan berbagai kegiatan atau proyek yang sudah ataupun akan dikembangkan.Kata Kunci: tektonik, gerakan tanah, sistem peringatan dini
KENDALI GEOLOGI TERHADAP POLA ALIRAN AIRTANAH BEBAS DAN TERKEKANG DALAM EVALUASI POTENSI AKIFER, STUDI KASUS DAERAH PANDAAN DAN SEKITARNYA, KABUPATEN PASURUAN, JAWA TIMUR Reza, Teuku; Hendarmawan, .; Alam, Boy Yoseph Cahya Sunan Sakti Syah
Bulletin of Scientific Contribution Vol 18, No 1 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1351.396 KB) | DOI: 10.24198/bsc.v18i1.26399

Abstract

Geological control has been examined on the pattern of groundwater flow from free and confined aquifer in the evaluation of aquifer potency in case study in the Pandaan and surrounding areas, Pasuruan Regency, East Java. Groundwater elevation (MAT) measurement data of dug wells, borehole pumping tests, 1D geoelectricity, and wellbore log results indicate that groundwater flow patterns from free and confined aquifers have the same flow direction from southwest to northeast indicating that the distribution hydrogeological units of both aquifers are relatively homogeneous. The depths of the free aquifer from 1 to 6 meters with sand and tuffaceous sand lithology. Confined aquifer from a depth of 40 meters with a thickness between 20 to 70 meters. The aquifer unit is a tuff breccias rock from the Mt. Arjuna Welirang and Tuf Rabano Formation, aquiclude units in the form of andesite lava from Mt. Arjuna Welirang. Potential confined aquifer evaluated from pumping test has a transmissivity value between 54 - 315 m2 / day. Hydraulic conductivity (k) values are between 1.46 - 12.4 m / day. Keywords: Hydrogeological unit, transmissivity, hydraulic conductivity, aquifer, aquiclude 
Co-Authors Emi Sukiyah Hendarmawan, . Khoirullah, Nur Raden Irvan Sophian, Raden Irvan Reza, Teuku Rizki, Afdal Sabila, Zahra Syahida Yusi Firmansyah, Yusi Zufialdi Zakaria, Zufialdi