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All Journal Jurnal RISET Geologi dan Pertambangan Journal of Degraded and Mining Lands Management JGE (Jurnal Geofisika Eksplorasi) Jurnal Wilayah dan Lingkungan Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Mineral, Energi dan Lingkungan Jurnal Mineral, Energi dan Lingkungan APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) Jurnal Sosial dan Teknologi Action Research Literate (ARL) Journal of Applied Geology Jurnal Jalan Jembatan

I Gde Budi Indrawan

Departemen Teknik Geologi, Fakultas Teknik, Universitas Gadjah Mada, Jl. Grafika No. 2, Senolowo, Sinduadi, Mlati, Sleman, D.I. Yogyakarta 55284, Indonesia.

Author-ID : 676691

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Social Sciences Transportation

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ANALISIS KESTABILAN LERENG DI DESA TERBAH DAN SEKITARNYA, KECAMATAN PATUK, KABUPATEN GUNUNG KIDUL BERDASARKAN SLOPE STABILITY PROBABILITY CLASSIFICATION Alvian Rizky Yanuardian; I Gde Budi Indrawan; I Wayan Warmada
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 28, No 1 (2018)
Publisher : Indonesian Institute of Sciences

Desa Terbah merupakan salah satu desa di Indonesia yang rawan longsor. Daerah ini berada pada sedimen Tersier yang telah mengalami deformasi dan pelapukan kuatyang berpotensi longsor,sehingga diperlukan analisis kestabilan lereng untuk upaya mitigasi. Tulisan ini bertujuan mengidentifikasi karakteristik satuan geologi teknik lereng dan nilai probabilitas tingkat kestabilan lereng. Metode penelitian yang digunakan yaitu pengamatan tingkat pelapukan, pengukuran bidang diskontinuitas (spasi, kekasaran, lebar bukaan) pada lereng berdasarkan metode Rock Mass Rating (RMR), pengujian laboratorium menggunakan point load test, dan analisis kestabilan lereng dengan metode kinematika dan Slope Stability Probability Classification (SSPC). Hasil penelitian menunjukkan bahwa terdapat lima satuan geologi teknik batuan, yaitu: Satuan Breksi Andesit 1, Satuan Breksi Andesit 2, Satuan Tufa, Satuan Batupasir Tufan, dan Satuan Batupasir. Hasil pengukuran pada 35 lereng menunjukkan 14 lereng berada dalam kondisi tidak stabil berdasarkan kestabilan lereng orientasi independen (tidak terpengaruh diskontinuitas), dan 18 lereng berpotensi terjadi longsor gelinciran (sliding), dan 14 lereng berpotensi terjadi longsor robohan (toppling) berdasarkan orientasi dependen (terpengaruh diskontinuitas).Terbah village is one of the rural areas in Indonesia that has high vulnerability to landslide. This area occupies the Tertiary sediment which had been deformed and highly weathered, therefore prone to landslide. It is important to analyze the slope stability of the study area as a part of the mitigation measures. This paper aims to identify the engineering geological units and the probability values of the slope stability. Methods included the observation of weathering degree, measurement of slope discontinuities (space, roughness, width of opening) according to Rock Mass Rating (RMR), point load test in the laboratory, and slope stability analysis using kinematic method and Slope Stability Probability Classification (SSPC). Results show that there are five engineering geological units: Andesitic Breccia Unit 1, Andesitic BrecciaUnit 2, Tuff unit, Tuffaceous Sandstone Unit, and Sandstone Unit. Measurements of 35 slopes show that based on orientation independent analysis 14 slopes are unstable, and based on orientation dependent analysis 18 slopes are prone to sliding and 14 slopes are susceptible to toppling.

Evaluasi Kondisi Geologi Teknik dalam Pembangunan Embung I Gde Budi Indrawan; Shinta Dwi Novianti; Heru Hendrayana; Doni Prakasa Eka Putra; Wahyu Wilopo
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 5, No 1 (2019): April
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Pucang Village was consisted of eruption materials of Merapi Volcano. The relatively high coefficient of permeability of the materials consisting this area caused rainwater to directly infiltrate into the ground. Evaluation of engineering geological conditions was conducted for construction of a detention pond in this area, which had limited water supply for daily activities. The evaluation was conducted on results of a 1:10.000 scale of engineering geological mapping and analyses of 1:10.000 scale of geological disaster maps produced by previous researchers. The engineering geological mapping involved mapping of morphological condition and active geomorphic process, lithological condition, existence of geological structure, and water source location. The evaluation results showed that the proposed location met the land suitability criteria for detention pond construction based on the morphological condition and active geomorphic process, existence of geological structure, and water source location, but did not meet those based on the lithological and vulnerability to Merapi Volcano eruption disaster. Construction of impermeable layer to prevent water seepage into the ground and periodic removal of sediment in the base of the detention pond were suggested to be carried out to keep the detention pond functioning properly.

Penentuan Zona Kerentanan Longsor Berdasarkan Karakteristik Geologi dan Alterasi Batuan Anastasia Dewi Titisari; Hitznaiti Zaidini' Khul Husna; Ilham Dharmawan Putra; I Gde Budi Indrawan
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 4, No 2 (2019): Maret
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

ABSTRACT Landslide is one of the most frequent disasters in Indonesia. The occurrence of landslides is heavily controlled by geological conditions especially in areas with composed by altered rocks. Hargotirto Village, Kokap District, Kulon Progo Regency, DIY is composed by altered rocks so that many landslides occur.It is necessary, thereforeto determine the landslide susceptibility zone based on the geological characteristics and rock alteration in the area as one of disaster mitigation efforts to reduce the risk of landslide disaster. The research method used is data collection in the field such as inclination data of slope, geological condition, and land cover; and laboratory analysis such as petrographic analysis, XRD (X-Ray Diffraction) analysis, and rock geochemical analysis using ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectroscopy).The collected data are used as parameters for landslide zonation determination using Analytical Hierarchy Process (AHP) method.The results showed that the lithology of the research area is andesite and porphyry diorite with alteration type of argillic and propylitic alteration. Their intensity are categorized as low to moderate alteration.Based on these conditions can be categorized into4 levels of landslide susceptibility namely the very high landslide susceptibility that dominates 35% of research areas in the north and northwest; the high landslide susceptibility of 20% spreads over the center of the study area; the moderate landslide susceptibility of 20% distributed in the center southernof the study area; and the low landslide susceptibility of 25% spread over the southern part of the study area.Therefore, residents who live in the area are advised to always be alert to the possibility of landslide because it is included in the zone of very high and high landslide susceptibility. Keywords: argillic alteration; Hargotirto; landslide susceptibility; prophyllitic alteration

The Evaluation of the Stability of Donan Cave, Pangandaran, West Java, Based on the Classification of Rock Mass Ikfi Maasyi Hanif; I Gde Budi Indrawan
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 7, No 4 (2021): December
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Assessment of rock mass quality was conducted to estimate the stability of Donan Cave. This research involved geological mapping, cave geometry mapping, rock mass quality zoning by scanline survey based on the Q-system rock mass classification, and cave stability estimation based on the rock mass quality, ratio of cave roof thickness to width, and load. The research results indicate that Donan Cave is composed of limestone of the Kalipucang Formation. Several faults are located in the vicinity of Donan Cave. Donan Cave is dominated by good to very good quality rock masses and is estimated to be stable in a relatively long period of time. However, rock fall hazard due to dynamic load at several zones, which have relatively thin and poor-quality rock masses has to be anticipated.

Engineering Gology Model of Bener Dam Diversion Tunnels in Geological Risk Disaster Mitigation Daru Jaka Sasangka; Dian Insani; I Gde Budi Indrawan
Jurnal Geofisika Eksplorasi Vol 6, No 3 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i3.95

The Bener Dam Diversion Tunnel Plan is located in Bener District, Purworejo Regency. Engineering geology mapping data, drillimg data and laboratory data used as primary data. Surface and subsurface analysis show that each rock unit has different index and mechanical properties. Generally, the rock mass quality conditions in the dam belonged to good Rock (80%) in the Rock Mass Rating (RMR) system (Bieniawski, 1989). The other rock mass quality type also found among them fair rock (5%), poor rock (5%), and very poor rock (10%). Poor rock mass quality conditions were controlled by geological structures, especially faults that partially cut through the tunnel geometry. The very poor quality of rock mass was in the volcanic lens (loose sand material) did not cut through the tunnel path. The difference stand-up time of the rock on the tunnel requires proper mitigation (Nguyen Nguyen, 2015). The stand-up time belonged to the dangerous condition was in the fault zone with poor rock mass quality, while the lens with very bad rock mass quality did not affect the stability of the excavation of the tunnel.

Zona Kemampuan Geologi Teknik untuk Pemukiman Daerah Prambanan dan Sekitarnya Kecamatan Prambanan, Kabupaten Sleman, Daerah Istimewa Yogyakarta Wisnu Aji Dwi Kristanto; I Gde Budi Indrawan; Salam Via Febriyanti
Jurnal Mineral, Energi dan Lingkungan Vol 4, No 1 (2020): Juni
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Kebutuhan lahan untuk pemukiman meningkat seiring dengan pertumbuhan penduduk yang kian pesat. Penyediaan lahan pemukiman yang baik, wajib memperhatikan kemampuan lahan berdasarkan kondisi geologi teknik untuk memastikan kesesuaian lahan. Penelitian zona kemampuan geologi teknik untuk pemukiman di daerah Kecamatan Prambanan, Kabupaten Sleman, Daerah Istimewa Yogyakarta dibatasi koordinat 442800mE-449800mE dan 9136500mN-9142000mN dengan luas daerah penelitian 38,5 km2. Penelitian zona kemampuan geologi teknik untuk pemukiman berupa rumah sederhana dengan pondasi dangkal berukuran 1x1m2 disusun berdasarkan analisis peta daya dukung batuan dan tanah, kemudahan penggalian, kemiringan lereng, kedalaman muka airtanah, dan kerentanan bencana geologi daerah penelitian melalui analytic hierarchy process. Hasil penelitian kempampuan geologi teknik untuk pemukiman dibagi menjadi: daerah perbukitan memiliki nilai kemampuan geologi teknik untuk pemukiman sangat rendah, rendah dan menengah, sedangkan daerah dataran memiliki nilai kemampuan geologi teknik untuk pemukiman tinggi pada sebagian besar area, menengah di daerah sekitar sungai besar, dan kemampuan geologi teknik sangat rendah untuk daerah sepanjang sungai besar. Kata Kunci: kemampuan geologi teknik; pemukiman; analytic hierarchy process

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v4i1.3177

AN EVALUATION OF ROCK SLOPE STABILITY USING LIMIT EQUILIBRIUM ANALYSES Faridha Aprilia; I Gde Budi Indrawan
Journal of Applied Geology Vol 6, No 2 (2014)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The stability of rock slopes is controlled by several factors, such as the intact rock strength, discontinuity characteristics, groundwater condition, and slope geometry. Limit equilibrium (LE) analyses have been commonly used in geotechnical practice to evaluate the stability of rock slopes. A number of methods of LE analyses, ranging from simple to sophisticated methods, have been developed. This paper presents stability analyses of rock slopes at the Batu Hijau open mine in Sumbawa Barat using various methods of LE analyses. The LE analyses were conducted at three cross sections of the northern wall of the open mine using the Bishop Simplified, Janbu Simplified, Janbu Generalised, and General Limit Equilibrium (GLE) methods in Slide slope stability package. In addition, a Plane Failure (PF) analysis was performed manually. Shear strength data of the discontinuity planes used in the LE analyses were obtained from back analyses of previous rock slope failures. The LE analysis results showed that the rock slopes were likely to have shallow non-circular critical failure surfaces. The factor of safety (Fs) values obtained from the Bishop Simplified, Janbu Simplified, Janbu Generalised, and GLE methods were found to be similar, while the Fs values obtained from the PF method were higher than those obtained from the more rigorous methods. Keywords: Batu Hijau mine, Bishop Simplified, Janbu Simplified, Janbu Generalised, limit equilibrium analyses, general limit equilibrium, rock slope stability, plane failure.

Site Investigation For Construction Of Emergency Spillway At The Jatigede Dam I Gde Budi Indrawan; Gusti Imam Warman
Journal of Applied Geology Vol 7, No 1 (2015)
Publisher : Geological Engineering Department Universitas Gadjah Mada

An emergency spillway has been planned to be constructed at the Jatigede Dam, West Java, to allow floodwater to flow downstream and to prevent the capacity of the main spillway to be exceeded during large flood events. The complex geology of theJatigede Dam area, however, poses a challenge to determine the suitable location for the emergency spillway construction, either in the area to the west or to the east of the embankment dam. An engineering geological mapping and landslide susceptibilityzoning were conducted to determine the engineeringgeological characteristics of the area surrounding theJatigede Dam. The site investigation showed that thearea to the west of the embankment dam tended tohave a lower slope inclination than the area to theeast of the embankment dam. Both areas to the westand to the east of the embankment dam were found tobe composed of less erosion resistant rock units. Theexistence of the earth retaining structures for slopestabilization in the area to the east of the embankment dam will, however, likely limit the flexibility in developing the emergency spillway route. With respect to the existence of fault systems, both areas to the west and to the east of the embankment dam will likely be influenced by similar conditions. The areato the west of the embankment dam tended to be lesssusceptible to landslide as compared to the area tothe east of the embankment dam. The undevelopedland use of the area to the west of the embankmen dam as compared to the area to the east of the embankment dam will provide more flexibility in construction of the emergency spillway. Due to the morefavorable engineering geological conditions, the area to the west of the embankment dam is proposed forthe location of the emergency spillway construction.Keywords: Emergency spillway, Engineering geological mapping, Jatigede Dam

Engineering Geology of Sidosari Area, Magelang, Central Java, Indonesia I Gde Budi Indrawan; Diyaning Ratri
Journal of Applied Geology Vol 2, No 1 (2017)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Development of settlement area in Sidosari area and the surroundings requires complete understanding of the engineering geological conditions, including susceptibility to landslides, to prevent damaged properties and loss of lives. Surface engineering geological mapping at a 1:25000 scale was conducted to develop a detailed landslide susceptibility map for spatial planning and to identify most controlling factor of landslides in the research area based on conditions of geomorphology, rock and soil, geological structure, groundwater seepage, and land use. The engineering geological mapping showed that landslides commonly occurred in the moderate slopes of the denudational hill landform having slope inclination ranging from 9 to 17°, in the areas covered by residual soils of the vitric tuff 2 unit, in the areas of no groundwater seepage, and in the settlement areas, including in Kranjang Lor area where soil creeping occurred. The high susceptibility zone covered 55.5 % of the research area and was characterized by having slope inclinations ranging from 9 to 35°, engineering geological units of vitric tuff 2 and tuff breccia, and land uses of rice and dry ﬁelds and settlement. The low cohesion and very high swelling potential of the residual soils of the vitric tuff 2 unit were considered to be the main controlling factor of landslides in the research area.

Co-Authors Abd Karim, Amirul Aiman Abrar, Mifthahul Adriansyah, Yan Afandi, Valentino Ilham Aisyah Shahirah Juhari Alfrianto, Rifki Alvian Rizky Yanuardian Amirul Aiman Abd Karim Anastasia Dewi Titisari Aprilia, Faridha Ardian Baroto Murti Aung, Hnin Thazin Baniarga Prabowo Daniel Happy Putra Daru Jaka Sasangka Dian Insani Dian Rusmanawati Didit Hadi Barianto Diyan Aditya Putra Pratama Diyaning Ratri Doni Prakasa Eka Putra Dwi Agus Kuncoro Dwikorita Karnawati Fahmi Aldiamar Fahmi Aldiamar, Fahmi Faridha Aprilia Fathan Hanifi Mada Mahendra Fatkhiandari, Irien Akinina Febrie Maulana Fajrin Gevor, Even Gusti Imam Warman Hendy Setiawan Heru Hendrayana Hitznaiti Zaidini' Khul Husna Hnin Thandar Phyu Hnin Thazin Aung Husein, Salahuddin I Wayan Warmada Ikfi Maasyi Hanif Ilham Dharmawan Putra Irien Akinina Fatkhiandari Jutika Aditya Nugraha Nugraha Kamai, Toshitaka Kuncoro, Dwi Agus Mahendra, Fathan Hanifi Mada Maulana, Deviana Shinta Murti, Ardian Baroto Nugraha, Jutika Aditya Nugraha Nugroho Imam Setiawan Nurul Huda Phyu, Hnin Thandar Putra Pratama, Diyan Aditya Rama Tri Saksono Ratri, Diyaning Ridwan Umbara Salam Via Febriyanti Sao Sochan Shinta Dwi Novianti Shinta Maulana, Deviana Sia Pamela Dita Sochan, Sao Subagyo Pramumijoyo Sugeng Sapto Surjono Sunardi Sunardi Sunardi Sunarko Sunarko Sunarko Sunarko Tamado, Daniel Taufiq Muhammad Wijayanto Tee Xiong Thandar Phyu, Hnin Toshitaka Kamai Tri Puji Astuti Tri Puji Astuti Umbara, Ridwan Wahyu Wilopo Wakhid Khoiron Nugroho Warman, Gusti Imam Wawan Budianta Wijayanto, Taufiq Muhammad Wisnu Aji Dwi Kristanto Xiong, Tee Yan Adriansyah Yayi Ismanda Yunie Wiyasri

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