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All Journal International Journal of Advances in Applied Sciences MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management ASEAN Journal of Systems Engineering Majalah Forum Teknik UGM Jurnal Penelitian Saintek Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan BIOTROPIA - The Southeast Asian Journal of Tropical Biology TAMBANG Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik JURNAL TEKNIK SIPIL ITP ISSN 2354-8452 Majalah Geografi Indonesia Jurnal Ketahanan Nasional Journal of Degraded and Mining Lands Management Jurnal Wilayah dan Lingkungan Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) JPSE (Journal of Physical Science and Engineering) Jurnal Teknologi Mineral dan Batubara Journal of Geoscience, Engineering, Environment, and Technology Journal of the Civil Engineering Forum Jurnal Geomine Indonesian Journal of Chemistry PROMINE Conference SENATIK STT Adisutjipto Yogyakarta Civil and Environmental Science Journal (CIVENSE) Jurnal Otomasi Kontrol dan Instrumentasi Journal of Appropriate Technology for Community Services Respati Community Development Journal: Jurnal Pengabdian Masyarakat Journal of Multidisciplinary Applied Natural Science Journal of Applied Geology Journal of the Civil Engineering Forum Jurnal Teknik Sipil Institut Teknologi Padang Techno Indonesian Journal of Physics (IJP) International Journal of Disaster Management JAGE BULLET : Jurnal Multidisiplin Ilmu ALTRON Jurnal Teknologi Mineral dan Batubara Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Jurnal Teknologi Sumberdaya Mineral Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir

Wahyu Wilopo

Department Of Geological Engineering, Universitas Gadjah Mada, Indonesia

Author-ID : 418061

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary

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Removal of Selenium (Se) and Zinc (Zn) inWater by Using Natural Zeolitic Tuff as Adsorbent from Tegalrejo Area, Gedangsari District, Gunungkidul Regency, Special Province Yogyakarta, Indonesia Manixone Thepgnothy; Doni Prakasa Eka Putra; Wahyu Wilopo
Journal of Applied Geology Vol 2, No 2 (2017)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Heavy metals are one of the most hazardous pollutant in the water. Thereare many methods for heavy metals remediation such as precipitation, oxidation, reverseosmosis, ion exchange and sorption by reactive materials. Zeolite is one of reactive materials have been used for water remediation. Therefero, in this the capability of zeolite from Gedangsari District, Gunung Kidul Regency, Special Province of Yogyakarta, Indonesia, will be invetigated to remidiate contaminated water by selenium (Se) and Zinc (Zn). To answer this objective, several samples of natural zeolitic tuff were taken and charaterized. Laboratory experiment was done by batch test. The results showed that natural zeolitic tuff is an effective adsorbent of Se and Zn and holds great potential material to remove heavy metals in water. The sorption isotherms of Se and Zn confirmed to type of Langmuir or Freundlich isotherms.

Rainfall Thresholds for Landslide Prediction in Loano Subdistrict, Purworejo District Central Java Province Farma Dyva Ferardi; Wahyu Wilopo; Teuku Faisal Fathani
Journal of Applied Geology Vol 3, No 1 (2018)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Purworejo Districtis a district with high disaster risk index in Indonesia, especiallylandslide. The main factor that triggers the landslide is rainfall. However, therehas been no comprehensive research on the intensity of rain that triggered the landslide in Purworejo District, especially in the Sub district of Loano. Huge landslide occurred in Loano Sub district at 2016, causing 46 deaths and damages in several houses. Therefore, it is necessary to study the prediction of landslide based on rainfall data and geological conditions of Loano Sub district, Purworejo District. The objective of this research is to analyze the mechanism of landslide, to analyze the rainfall that triggers the landslide and to estimate the intensity of rain that can triggers the landslide. The research method is collecting historical data of landslides in Purworejo District along with rainfall data, geological observation that includes the condition of lithology, geomorphology and hydrogeology,undisturbed soil sampling in Loano Sub district. The prediction of landslide uses empirical methods which were then simulated by Geostudio 2012 Software. The results show that the type of landslide is sliding, the main control factor is the steep slope and the thickness of the soil. The rainfall threshold triggering landslide are as follows for lithology andesite breccia I = 81.782 D????1.197, sandy clay I = 92.579 D????0.13, and andesite intrusionI = 145.32 D????0.338.

Preliminary Study of Liquid Hydrocarbon Biodegradation By Indigineous Bacteria Isolated from Wonocolo Village, Bojonegoro District, East Java Province Wahyu Wilopo; Bramono Dwi Kusumo; Endah Retnaningrum
Journal of Applied Geology Vol 2, No 2 (2017)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Aquatic environmental pollution due to petroleum waste can cause disruption to the environment and damaging of flora and fauna. It has been reported that petroleum contaminatin occurs in the Bengawan Solo river, East Java Province. Liquid hydrocarbon waste pollution can be remediate through various processes, one of them is biodegradation. Biodegradation a part of bioremediation, is the process by which organic substances are decomposed by microorganisms into simpler substances such as carbon dioxide, water and ammonia. Bioremediation has minor side effects compare to other methods because it’s more effective, efficient, economical and eco-friendly through biological process. This study aims to identify bacteria for liquid hydrocarbon degradation from the rivers in Wonocolo Village, Bojonegoro District and to determine maximum percentage of inoculum to produce the highest efficiency of liquid hydrocarbons degradation. Based on phenotypic characters, the selected bacteria was identified as a genus of Moraxella. Its bacterium with a concentration of 2 % can reduce hydrocarbons to a maximum of 0.67 % per hour at the exponential phase growth.

Correlation of P-wave Velocity with Rock Quality Designation (RQD) in Volcanic Rocks Teuku Faisal Fathani; Ainul Fatayaatis Salaamah; Wahyu Wilopo
Journal of Applied Geology Vol 3, No 2 (2018)
Publisher : Geological Engineering Department Universitas Gadjah Mada

One important part of rock mass investigation is the geomechanical assessment in terms of rock mass classification systems. Rock mass classification is one of the most efficient methods in rock mechanics to provide a basic understanding of rock mass characterization. Rock mass properties can be determined by a seismic refraction survey as an indirect geophysical assessment. In this study, the P-wave velocity from seismic refraction was compared with the Rock Quality Designation (RQD) from the boreholes. The empirical correlation between the RQD and the P-wave velocity was found by using the linear regression analysis. The RQD value estimated from the P-wave velocity can beapplied for tropical environment study with geological conditions of volcanic rocks. This study helps to estimate and predict the subsurface rock quality, to reduce investigation costs, and to improve understanding of subsurface rock quality.

Landslide Risk Assessment for Designing Monitoring and EarlyWarning System Teuku Faisal Fathani; Tuan Anh Bui; Wahyu Wilopo
Journal of Applied Geology Vol 4, No 1 (2019)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Landslide is the most frequent natural disaster in Yogyakarta, Indonesia. In the mid-March 2018, a few cracks appeared in the north of the hill in the Pendoworejo Village, Kulon Progo District, Yogyakarta Special Province. The landslide movement of this area still threatens the residents and makes them evacuated due to their fear upon potential landslide disaster. In order to reduce the risk, landslide investigation and risk assessment were conducted. The stability analysis focused on the relationship of the displacement,the velocity and the fluctuation of groundwater level due to the rainfall intensity. Then, a monitoring and warning system was designed as a non-structural mitigation effort. Based on the preliminary investigation on April 2018, there was no evidence of mass movement on the west and south part of the hill. On the other hand, the north part area was estimated to have risk as indicated by the occurrence of many cracks. Based on the result of analysis, the fluctuation of the groundwater level rose or dropped substantially before and after heavy rainfall. In the rainy season, the velocity and the displacement increased slightly in the first three months and grew rapidly afterward. In fact, the landslide risk increased in every rainy season. Therefore, the risk could be more dangerous in the future.

Chromium Precipitation Activity and Molecular Characterization of Sulfate-Reducing Bacteria Endah Retnaningrum; Dwiana Muflihah Yulianti; Wahyu Wilopo
Journal of Applied Geology Vol 4, No 1 (2019)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Chromium is one of the metals used in many areas of industry., However, chromium is toxic to organisms when present in large quantities in the environment. One of the method for treatment of hazardous waste containing chromium in the aquatic environment can be removed by bioremediation using sulfate-reducing bacteria (SRB). Therefore, the purpose of this research were to analyze the chromium precipitation activity of sulfate-reducing bacteria isolated from sulfate reducing bioreactor and its molecular identification using 16S rRNA gene sequences. The result observed that the isolate of sulfate-reducing bacteria (KGP1 strain) has chromium tolerancy ability up to 5 ppm. It also showed that the strain KGP1 could precipitate chromium up to 0.141 ppm (79 %) on 5 days incubation. Based on 16S rRNA gene sequences, this strain identified as Desulfovibrio aerotolerans.

Groundwater Flow Modeling at Sejorong Watershed, Sumbawa,West Nusa Tenggara, Indonesia Doni Prakasa Eka Putra; Adelide Asriati Sekar Rianda; Wahyu Wilopo
Journal of Applied Geology Vol 4, No 2 (2019)
Publisher : Geological Engineering Department Universitas Gadjah Mada

ABSTRACT. Batu Hijau mine pit is known as one of the largest copper pit mine in Nusa Tenggara Barat, Indonesia. Similiar as other copper mine pits in Indonesia, This site also faces acid mine water (AMD) problem. Based on the mine management plan, the AMD generated from this pit is being collected into Santong ponds in the southwest of the pit located in the upstrean area if Sejorong watershed. By the next decade, Batu Hijau mine will be in the closure mine period and it is important to understand the probable move- ment of AMD under the Santong ponds whether the AMD leaked to groundwater or not. This research aims to develop a numerical model of groundwater ﬂow and predict the movement of AMD by applying particle tracking method. Secondary and primary data of geology, hydrology, and hydrogeology. Also, groundwater pumpage discharge infor- mation was collected and analysed to develop hydrogeological conceptual model and the numerical model. The conceptual model of hydrogeological system in the research area is known to be built on unconﬁned aquifer system from a combination of weathered and fractured volcanic rocks in the upstream to middle part of watershed and majorly by allu- vial and coastal deposits in the downstream area. The thickness of aquifer is vary between 20 to about 300 m and divide into 5 layers in the numerical model, with hydraulic conduc- tivity ranges between 5 to 100 m/day and groundwater recharge is vary between 180 to 700 mm/year from downstream to upstream of watershed. Groundwater ﬂow boundaries in the Sejorong watershed are mainly controlled by topographical feature as water divide boundaries and the existing of Sejorong parennial rivers in the middle of this watershed. Steady state particle tracking results from the numerical groundwater ﬂow model show AMD from Santong ponds may migrate in groundwater only to a distance of about 500 m to the downstream and therefore it is unlikely that AMD seepages from Santong pond may contaminate water in the production wells.

The 22 February 2018 landslide mechanism in Pasir Panjang Village, Brebes Regency, Central Java, Indonesia Wahyu Wilopo; Adam Raka Ekasara; Hendy Setiawan; Dwikorita Karnawati
Journal of Applied Geology Vol 4, No 2 (2019)
Publisher : Geological Engineering Department Universitas Gadjah Mada

On 22 February 2018 landslide occurred in Pasir Panjang Village, Salem District, Brebes Regency of Central Java Province, Indonesia. About 8 people were died, 4 people were injured and several infrastructures were damaged due to this landslide. This research is carried out to understand geological-geotechnical condition and to study the initiation mechanism of the landslide. Field investigation and UAV mapping are carried out to detect slip surface and define slope geometry. The rainfall-induced pore-water pressure is estimated by using the Slope Infiltration Distributed Equilibrium (SLIDE) model. Then, limit equilibrium method is used to estimate the safety factor of the slope, while the shear strength parameters are determined by applying back analysis approach that compared with data from laboratory tests. The results show that landslide occurred in permeable layer of silty sand overlaid above impermeable andesitic breccia. Results from back analysis indicate that the shear strength parameters and rainfall intensity are strongly influence the stability of slope against landslide.

The Engineering Characteristics and Classifications of Rock Masses along Road Section from Prambanan to Patuk, Yogyakarta, Indonesia Aisyah Shahirah Juhari; I Gde Budi Indrawan, Dr.; Wahyu Wilopo
Journal of Applied Geology Vol 6, No 2 (2021)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Several attraction places and agriculture area that essentials for tourism and villager to do their activities are located approximately 6 km along the road of Candi Ijo to Ngoro-Oro in between Prambanan and Patuk sub-districts, Yogyakarta, Indonesia. Many jointed rock masses along the road have the potential to fail. This paper describes the rock mass characteristic and quality determined using the Geological Strength Index (GSI) and Rock Mass Rating (RMR) classifications. The rock mass characteristic and quality were essentially the preliminary results of a study to evaluate stability of the rock slopes along the road of Candi Ijo to Ngoro-Oro. Field observation and laboratory tests were carried out to determine parameters of the GSI and RMR. The results show that the slopes in the study area consisted of tuffaceous sandstone, vitric tuff, lithic tuff, cemented tuffaceous sandstone, lapilli tuff, subarkose, laminated mudrock, and laminated tuffaceous sandstone. The intact rocks were classified as weak to very strong. The research area consisted of three rock mass qualities, namely fair rock mass quality having GSI between 30 and 45 and RMR between 41 and 60, good rock mass quality having GSI between 46 to 65 and RMR between 61 and 80, and very good rock mass quality having GSI > 65 and RMR between 81-100. The relationship between GSI and RMR obtained in this study was in good agreement with that proposed by Hoek et al. (1995).

Estimating of Maximum Groundwater Level to Trigger Landslide in Batu Hijau Open Pit Mine, West Nusa Tenggara, Indonesia Amirul Aiman Abd Karim; Wahyu Wilopo; I Gde Budi Indrawan; Yan Adriansyah
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The safety of the employees is essential in the mining activity area. Thus, the sloping wall of the pit needs to evaluate from time to time to avoid any loss due to landslide. One of the essential parameters to lead to slope failure is groundwater. Therefore, this paper highlights the limitations of the groundwater for the existing slope mine by analyzing it for several groundwater levels until it reached a safety factor below 1.2. The analysis was done using a finite element method for slope stability and finite element analysis for groundwater seepage for groundwater modeling. The results show that the safety factor of the slope showing a linearly decreasing trend and safety factor reached below 1.2 when 70 m increment in groundwater level from the original groundwater level model.

Co-Authors Abd Karim, Amirul Aiman Adelide Asriati Sekar Rianda Adhi Susanto Adi, Restu Dwi Cahyo Adriansyah, Yan Afandi, Moh Fahri Afrizal Abdi Musyafiq Agung Setianto Agus Aktawan Agus Budhie Wijatna Agus Prasetya Agus Prasetya Ahmad Agus Setiawan Ahmad Agus Setiawan Ahmad Taufiq Ahmad Tawfiequrrahman Yuliansyah Ainul Fatayaatis Salaamah Aisyah Shahirah Juhari Alessandro Pagliaroli AM Lelie Novia W Amalina, Anisa Nur Amirul Aiman Abd Karim Andriyanto Andriyanto Anh Bui, Tuan Ansori, Tirangga Aprilia, Faridha Ardiansyah Arief Budiman Arif Kusumawanto Arrisaldi, Thema Aspriadi, Feri Atikah Zahidah Atmaja, Ammar Dwi Avantio Pramaditya Bayu, Himawan Tri Boreborey, Ty Boulom, Johnny Bramono Dwi Kusumo Budi Nur Cahyo Daris, Pieter Jhon Joshua Deepak Chamlagain Defi Rizkasari Denizar Rahman Dianto Isnawan Didit Hadi Barianto Dimas Hastama Nugraha, Dimas Hastama Doni Prakasa Eka Putra Dwi Kusumo, Bramono Dwiana Muflihah Yulianti Dwikorita Karnawati Dwikorita Karnawati Egy Erzagian Ekasara, Adam Raka Emanuel G. Manek Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Endah Retnaningrum Esti Handini Fachry Abda El Rahman Fadliansyah, Fandi Fahriza Fawwas Asrory Fajrianto, Rizq Farma Dyva Ferardi Fathan, Teuku Faisal Fatmawati, Nurlaila Feikal Aprieza Ferardi, Farma Dyva Ferian Anggara Fikri Faris Fikri Faris, Fikri Firginawan Surya Wanda Fuady Ahmad Lathif, Iqbal Fuady Ahmad Galeh Nur Indriatno Putra Pratama Giuseppe Lanzo H Setiawan Harry Leo Kharisma Haryono, Septiawan Nur Hendy Setiawan Heng, Salpisey Hermawan, Much. Taufik Tri Heru Hendrayana Hirajim, Tsuyoshi Hirajima, Tsuyoshi I Gde Budi Indrawan I Wayan Warmada Inderawan, Gde Budi Irvani Irvani Irvani, Irvani Irvani, Irvani Irwan Setyaji Johnny Boulom Joko Waluyo Junji Kiyono Junji Kiyono Junun Sartohadi K D Setyawan Keiko Sasaki Kezia Kartika Windya Kezia Kartika Windya Khan, Kamran Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Kirbani Sri Brotopuspito Kiyono, Junji Kusumaningrum, Serafica Btari Christiyani Laowattanabandit, Pipat Lathif, Iqbal Fuady Ahmad Luthfi Effendi Luthfi Effendi Makealoun, Somyot Manixone Thepgnothy Maris Setyo Nugroho Mohammad Kholid Ridwan Mohammad Pramono Hadi Muflih, Ghufron Zaida Muhammad Hidayat Furqon Muhammad Sulaiman Muhammad Zulfikrie Myat Thu Naing Nadia Sekarlangit Nugroho, Sunu Ardhi Nurul Huda Phyu Phyu Thin Puji Pratiknyo Puji Pratiknyo Pujo Widiyantoro, Wahid Pulung Arya Pranantya, Pulung Arya Purnamaningsih, Nur Aini Pyi Soe Thein Pyi Soe Thein Qurrahman, Alfian Hardi R Risanti R. Andy Erwin Wijaya Rahman, Denizar Rama Tri Saksono Ramesh Adhikari Razi, Muhammad Haikal Restu Dwi Cahyo Adi Restu Tandirerung Retnaningrum, Endah Retnaningrum, Endah Ridwan Budi Prasetyo Rilo Restu Surya Atmaja Ronggo Sadono Salaamah, Ainul Fatayaatis Salahuddin Husein Salpisey Heng Samodra, Guruh Santie, Putri Anjary Widya Sasaki, Keiko Satoru Kawasaki Sekar Rianda, Adelide Asriati Septiawan Nur Haryono Setiawan, Ahamd Agus Setiawan, Muhammad Anggri Shinta Dwi Novianti Slamet Widodo Somyot Makealoun Soutsadachan Chandalsouk Sri Anggoro Prahastono Srijono ., Srijono Srijono Srijono Srijono Srijono Srijono Srijono, Srijono Su Dar mono Subagyo Pramumijoyo Subagyo Pramumijoyo Subagyo Pramumijoyo, Subagyo Subur Priyono Sudarno, Ignatius Sunarko Sunarko Sunarko Sunarko Surya Damar Sasongko Putro Susatio, Raja Taufiq Muhammad Wijayanto Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Teuku Faisal Fathani Thein, Pyi Soe Thema Arrisaldi, S.T., M.Eng. Thepgnothy, Manixone Tsuyoshi Hirajim Tsuyoshi Hirajima Tsuyoshi Hirajima Tuan Anh Bui Ty Boreborey umi barokah Vienti Hadsari Warmada, Wayan Wawan Budianta Wijayanto, Taufiq Muhammad Wisnu Rachmad Prihadi Yan Adriansyah Yuli Fajarwati Yulianti, Dwiana Muflihah Zuhdi, Rasyid Zulaikha Budi Astuti Zulkifli Zulkifli

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