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Perkembangan Geologi pada Kuarter Awal sampai Masa Sejarah di Dataran Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno; Siregar, Darwin Alijasa
Indonesian Journal on Geoscience Vol 1, No 2 (2006)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol1no2.20065The uplift of Southern Mountains in Early Pleistocene has formed the Yogyakarta Basin. In this basin, the Merapi volcanic activity has been developing. Based on 14C dating in cinder deposits exposed at Cepogo, the volcanic activity took place since Â±42 ka. While on the basis of K/Ar dating in andesitic lava at Bibi Volcano, the activity took place since 0.67 ma. The high in the south and the appearance of Merapi volcanic dome in the north had caused a fl at valley. The southern part of the valley is bounded by the Southern Mountains and the western part is bounded by the West Progo Mountains. In the present time, the lithology of the areas which are interpreted as a palaeo-valley is composed of black clay deposits. This black clay is a contact between the basement rocks and Merapi volcanic deposits. The black clay deposits exposed in the Progo River (Kasihan) has been developed since Â±16.59 to 0.47 ka, while in the Opak River (Watuadeg) 6210 y BP. Younger black clay deposits intersecting with lahars are also exposed at the Winongo River and have an age of 310 y BP. The age data of volcanic stratigraphy shows that Merapi activities had taken place since Â±6210 up to Â±310 years ago. Â

Dinamika pengendapan lahar permukaan pada alur-alur lembah di bagian selatan Gunung Api Merapi, Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno
Indonesian Journal on Geoscience Vol 1, No 3 (2006)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol1no3.20062Endapan aliran rombakan Gunung Api Merapi, yang lebih dikenal sebagai lahar, terbentuk dari hasil longsoran endapan awan panas yang dipicu oleh curah hujan yang sangat tinggi. Pada saat ini, endapan awan panas tersebut berasal dari guguran kubah lava. Material suspensi tersebut selanjutnya menuruni lereng dengan kecepatan yang tinggi, menghasilkan aliran turbulen. Aliran tersebut biasanya berkembang pada daerah dengan perbedaan morfologi berkemiringan lereng tinggi ke landai, atau yang sering dikenal sebagai daerah tekuk lereng. Studi ini didasarkan pada pengamatan dan pengukuran fragmen lahar yang berukuran besar di permukaan. Analisis meliputi arah penyirapan, bentuk, dan besar butir fragmen. Hasil penelitian mendapatkan model arah aliran fragmen besar lahar dari bagian atas aliran rombakan, yang membentuk âmodel punggung katakâ atau âmodel punggung gajahâ. Bagian depan katak atau gajah (kepala) yaitu arah aliran atau bagian depan aliran. Hasil penelitian juga menunjukkan bahwa model tersebut berlaku pada fragmen dengan diameter 90 cm atau lebih besar. Di daerah penelitian, fragmen dengan diameter 90 cm mencapai jarak hingga 22 km dari sumbernya. Hasil penelitian ini dapat digunakan sebagai model untuk menentukan arah aliran lahar (aliran rombakan) purba yang sumbernya belum diketahui. Â

Quality Policy as a Manifestation of Strategic Plan at Bandung lnstitute of Technology,Indonesia Bijaksana, Satrio; Puradimaja, Deny Juanda
Jurnal Manajemen Teknologi Vol 7, No 1 2008
Publisher : SBM ITB

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Definition of quality in higher education has changed rapidly, especially in the last two decades, when quality assurance has turned into global issue in higher education management. In that context, Bandung Institute of Technology (ITB) has declared ITB Quality Policy 2006-2010 that symbolizes the institutional commitment to improve the quality in guided, continuous, and accountable manner. The Policy was developed based on the evaluation of the previous policy as well as the 2006-2010 strategic plan of ITB. Other than development guidelines on six different areas, the Policy also consists of a set of indicator and targets. In this conference, we will share the lessons learned from the development and implementation of this Policy.Â Keywords:Â quality policy, Institut Teknologi Bandung (ITB), higher education

Identifikasi Kondisi Geologi dan Kualitas Airtanah di Desa Pelauw, Kecamatan Pulau Haruku, Kabupaten Maluku Tengah Kololu, Micky; Tuasikal, Hawa; Jati, Stevanus Nalendra; Puradimaja, Deny Juanda; Limehuwey, Resti; Ulfa, Yuniarti; Purwoarminta, Ananta
Journal of Science, Technology, and Visual Culture Vol 4 No 1 (2024): Juli 2024
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Pemenuhan kebutuhan air di Desa Pelauw sebagian besar bergantung pada air sungai dan airtanah. Namun ada sebagian masyarakat di Desa Pelauw kesulitan mendapatkan sumber air, sebab beberapa sumur gali memiliki sifat fisik payau. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi kondisi geologi dan kualitas airtanah di Desa Pelauw, Kecamatan Pulau Haruku. Metode yang digunakan adalah interpretasi kondisi geologi, dan parameter fisik-kimia airtanah. Selanjutnya dilakukan klasifikasi nilai tiap parameter. Hasil penelitian menunjukkan bahwa Daerah penelitian di Desa Pelauw berada pada Satuan Endapan Aluvium (Qa), Batugamping Koral (Ql), dan Batuan Gunungapi Ambon (Tpav). Sistem hidrogeologi Desa Pelauw memiliki akuifer produktivitas sedang, akuifer produktivitas tinggi-sedang, dan akuifer produktif dengan pola aliran airtanah mengalir dari arah selatan ke utara dan intensitas curah hujan menengah. Kualitas air berdasarkan Permenkes No. 492 Tahun 2010 memiliki kondisi air tawar dengan nilai EC (138-1953 µs/cm), TDS (64-872 ppm), dan salinitas (0-2,84%), kondisi air payau dengan nilai EC (2072-2712 µs/cm), TDS (1.342-2.474 ppm), dan salinitas (4,04-5,42%), pH air layak minum dengan nilai 7,30-8,42 dan pH basa pada 8,63-8,56. Sampel airtanah pada pada daerah penelitian berasal dari adanya interaksi antara air dengan material penyusun akuifer.

Analisis Kesesuaian Lahan Kawasan Permukiman dan Pertanian Ubi Kayu Berdasarkan Aspek Geologi Lingkungan di Kecamatan Teluk Ambon Baguala Kololu, Micky; Jacob, Grace Christien Julian; Puradimaja, Deny Juanda; Limehuwey, Resti; Ulfa, Yuniarti; Jati, Stevanus Nalendra; Purwoarminta, Ananta
Journal of Science, Technology, and Visual Culture Vol 4 No 1 (2024): Juli 2024
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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Luas lahan permukiman dan pertanian semakin mengecil seiring dengan laju pertumbuhan penduduk, namun ketersediaan lahan terbatas. Perencanaan yang baik diperlukan untuk menghindari alih fungsi lahan dan memaksimalkan potensi lahan. Kecamatan Teluk Ambon Baguala mengalami laju pertumbuhan penduduk sebesar 0,72% per tahun 2010 – 2020, memiliki perencanaan pengembangan kawasan permukiman dan pertanian ubi kayu, serta potensi sumber daya dan bencana geologi. Oleh karena itu, diperlukan analisis kesesuaian lahan untuk kawasan permukiman dan pertanian ubi kayu berdasarkan aspek geologi lingkungan pada daerah tersebut. Metode SMCE (Spatial Multi-Criteria Evaluation) digunakan untuk menganalisis kesesuaian lahan. Berdasarkan analisis SMCE, kawasan permukiman terdiri dari empat kelas kesesuaian lahan, yaitu sangat sesuai (8,6%), cukup sesuai (23,5%), sesuai marginal (23,9%), dan tidak sesuai (41,6%) dengan luas kelas lahan sesuai 1977,15 ha dan lahan tidak sesuai 1625,15 ha. Kawasan pertanian ubi kayu terdiri dari empat kelas kesesuaian lahan, yaitu sangat sesuai (7,3%), cukup sesuai (6,1%), sesuai marginal (25,3%), dan tidak sesuai (19,7%) dengan luas kelas lahan sesuai 827,51 ha dan lahan tidak sesuai 2774,79 ha. Berdasarkan analisis prioritas kawasan, maka luas kawasan permukiman 1894,53 ha dan kawasan pertanian ubi kayu 221,98 ha.

The Carbon Footprint Estimation based on Campus Activities in ITERA (Institut Teknologi Sumatera) Kartika Sari, Novi; Gusvita, Rinda; Puradimaja, Deny Juanda
Journal of Sustainability Perspectives Vol 1: Special Issue 2021
Publisher : Universitas Diponegoro

ITERA (Institut Teknologi Sumatera) is one of young university situated in Lampung Province, Indonesia. In 2018, the average population of campus (students, faculties, and staff) was about 9584 persons. The objective of this paper is to inventory Green House Gasses (GHGs) and then to calculate carbon footprint using equation by UI Greenmetric Guideline 2018 except for fuel and LPG consumption, paper use, and organic waste generation by using GHGs Protocol. Three scopes of GHGs emission were used to classify based on both direct and indirect source(s). The first scope was presented by LPG consumption and fuel consumption of campus’s car. Electricity consumption became scope 2 while the scope 3 involved paper use, organic waste generation including food waste and Yard trimmings, and transportation activities of both motorcycles and cars. The estimated GHGs emission was about 2846.541 metric ton CO2eq during 2018-2019 (one year) with the portion of each scope resulting 10.2%, 62%, and 28.2%, respectively. Electricity usage was being the highest contributor of carbon footprint. The inventory of GHGs will help top management of campus to evaluate and determine some strategies for minimization, reduction, and mitigation notably in electricity sector by some strategies such as substituting electric devices into eco-friendly products, applying energy management ISO 50001, and others.

Forecasting of Using Electricity Consumption at ITERA (Institut Teknologi Sumatera) until 2025, to Improve Application of Renewable Energy in Lampung Province Baqaruzi, Syamsyarief; Muhtar, Ali; Puradimaja, Deny Juanda
Journal of Sustainability Perspectives Vol 1: Special Issue 2021
Publisher : Universitas Diponegoro

Institut Teknologi Sumatera (ITERA) is a new campus located in Lampung province- Indonesia. It is almost 6 years old, within large data on the total population human activity in this 275-hectare campus around 9500 persons, so that necessary to forecasting energy demand in the future, ITERA can project programs that are in line with the Indonesian government, specifically increasing using of renewable energy. which the government has a national energy policy in 2025 of 23%. Mostly in Lampung province, the electricity produced is still dominated by fossil energy (e.g., coal, diesel, etc), therefore as a campus with a technological background, ITERA must be able to bring a paradigm shift to be used from electricity consumption in the surrounding areas. The results of this study will project electricity usage in ITERA over the next 5 year, where electricity usage in ITERA 2019 is 2.472 GWh or 6,775 KWh/day, expected with a development strategy to implementing the efficiency of green energy, so that can meet the challenges of reducing CO2 emissions and energy-saving behavior, also keep sustainable impact for Indonesia.

Forecasting of Using Electricity Consumption at ITERA (Institut Teknologi Sumatera) until 2025, to Improve Application of Renewable Energy in Lampung Province Baqaruzi, Syamsyarief; Muhtar, Ali; Puradimaja, Deny Juanda
Journal of Sustainability Perspectives Vol 1: Special Issue 2021
Publisher : Universitas Diponegoro

Institut Teknologi Sumatera (ITERA) is a new campus located in Lampung province- Indonesia. It is almost 6 years old, within large data on the total population human activity in this 275-hectare campus around 9500 persons, so that necessary to forecasting energy demand in the future, ITERA can project programs that are in line with the Indonesian government, specifically increasing using of renewable energy. which the government has a national energy policy in 2025 of 23%. Mostly in Lampung province, the electricity produced is still dominated by fossil energy (e.g., coal, diesel, etc), therefore as a campus with a technological background, ITERA must be able to bring a paradigm shift to be used from electricity consumption in the surrounding areas. The results of this study will project electricity usage in ITERA over the next 5 year, where electricity usage in ITERA 2019 is 2.472 GWh or 6,775 KWh/day, expected with a development strategy to implementing the efficiency of green energy, so that can meet the challenges of reducing CO2 emissions and energy-saving behavior, also keep sustainable impact for Indonesia.

The Carbon Footprint Estimation based on Campus Activities in ITERA (Institut Teknologi Sumatera) Kartika Sari, Novi; Gusvita, Rinda; Puradimaja, Deny Juanda
Journal of Sustainability Perspectives Vol 1: Special Issue 2021
Publisher : Universitas Diponegoro

ITERA (Institut Teknologi Sumatera) is one of young university situated in Lampung Province, Indonesia. In 2018, the average population of campus (students, faculties, and staff) was about 9584 persons. The objective of this paper is to inventory Green House Gasses (GHGs) and then to calculate carbon footprint using equation by UI Greenmetric Guideline 2018 except for fuel and LPG consumption, paper use, and organic waste generation by using GHGs Protocol. Three scopes of GHGs emission were used to classify based on both direct and indirect source(s). The first scope was presented by LPG consumption and fuel consumption of campus’s car. Electricity consumption became scope 2 while the scope 3 involved paper use, organic waste generation including food waste and Yard trimmings, and transportation activities of both motorcycles and cars. The estimated GHGs emission was about 2846.541 metric ton CO2eq during 2018-2019 (one year) with the portion of each scope resulting 10.2%, 62%, and 28.2%, respectively. Electricity usage was being the highest contributor of carbon footprint. The inventory of GHGs will help top management of campus to evaluate and determine some strategies for minimization, reduction, and mitigation notably in electricity sector by some strategies such as substituting electric devices into eco-friendly products, applying energy management ISO 50001, and others.

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