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PENGARUH DISKONTINUITAS MASSA BATUAN VOLKANIK TERHADAP STABILITAS LERENG DI DAERAH JELAPAN DAN SEKITARNYA, KECAMATAN PUNDONG, KABUPATEN BANTUL, DAERAH ISTIMEWA YOGYAKARTA Rakhman, Arie Noor; Triheriyadi, Nur Widi Astanto Agus
Jurnal Teknologi Technoscientia Vol 10, No 1 (2017): Vol 10 No 1 Agustus 017
Publisher : IST AKPRIND YOGYAKARTA

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This research is intended to know the effect of discontinuity on the mass of volcanic rock for rock slope stability. The study sites are located at Jelapan area and its surrounding, Pundong District, Bantul Regency, Special Region of Yogyakarta. With stability assessments of rock slopes, it can be used to identify potential disasters of rock mass movement, direction of movement and recommendations for disaster risk minimization. Analysis of the continuity on the mass of volcanic rock using rock mass classification of rock mass rating system (RMR) (Bieniawski, 1989). The data used are physical properties, index properties, mechanical properties, orientation of joint position and rock slope. The synthesis of data is done mainly on morphological data, stratigraphy, geological structure to know the control of geological condition on the stability of volcanic rock slope in research area.Based on the calculation of the rock mass classification of RMR, the cliff at 7Â°59â20,88â LS 110Â°19â19,09â BT is 28 which is considered poor. The RMR value is controlled by intensive joints that dominate with joint spacing less than 60 mm; the condition of the surface of the joint field is smooth and continuous, estrangement joint 1 - 5 mm, slightly weathered with a value RQD 43.37%. Rock mass that collapses and landslides are lava and andesite breccia. The rock fall occurs following the slope of the planar plane of the platy joint structure and the rock contact N170Â°E/32Â°. It is interpreted by the initial stress control with high anisotropic stress at the edge of the slope.

REKAYASA GEOMEDIS PEMANFAATAN PASIR PANTAI DI PANTAI PARANGRITIS DAN SEKITARNYA, KECAMATAN KRETEK KABUPATEN BANTUL DAERAH ISTIMEWA YOGYAKARTA Rakhman, Arie Noor
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

This research aims to utilize sand in Parangtritis Beach, Parangtritis Subdistrict, Kretek, Bantul regency, Yogyakarta Special Region. Utilization of sand with geomedical engineering as means therapy for valuable health sand and applicable scientific. The method used in the form of field data capture characteristic properties of sand to determine the effect of the physical properties of the sand to the sand as a medium utilizing health therapy, include: color, grain size, dust properties, mineral composition, geology and inundated the following conditions as the controller. Primary data field is supported by the analysis of laboratory data in the form of grain size distribution, density, magnetic properties, and secondary data relating to the application of sand therapy information. Composition of magnetic minerals (average 66.20%) were more abundant than non-magnetic mineral grain size and the dominance of fine-sized sand (0.425 to 0.075 mm) affects the temperature of radiant heat on the sand (41.4 to 42 Â°C). Utilization of hot sand is recommended for optimal therapy performed at 16:00 to 18:00 pm with sunny weather conditions. Application using a combination therapy of Egypt model and Tembolor Beach, Lombok. Sand therapy by using a parabolic sand dunes can be applied with local wisdom of the area. Sand retrieval can be done by reusing the small scale and limited. Barchan sand dune land use is not recommended in order to preserve its existence.

REKAYASA VEGETASI UNTUK KONSERVASI LAHAN RAWAN LONGSOR DI LEMBAH SUNGAI CENGKEHAN, KECAMATAN IMOGIRI, KABUPATEN BANTUL Rakhman, Arie Noor; -, Muchlis; Septyawan, Bayu Ade
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 2 Februari 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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This study aims to select vegetation as a landslide controller in the Cengkehan River Valley, Imogiri District, Bantul Regency, Special Region of Yogyakarta. It is adjusted to the characteristics and thickness of the landslide, the height, and slope of the morphology, the typical roots and the suitability of the community interest of the plant species. The slope of the valley is 15Â°-60Â° and 75-325 meters above sea level. Landslides are on the north cliff in the direction of landslides, N 234Â°E, along the morphological orientation directed at N324Â°E. Landslides are slides that combine with the movement of rocks (wedge failure). Landslide material results from weathering of basalt that the degree of weathering of rock is not continuous between levels III and V. The soil is eluvial sediment which is identified as latosol with thickness up to 2 meters. The recommended vegetation for shallow landslide type is deep-rooted vegetation. They are Dalbergia pinnata and Parkia speciosa, especially for land with slope between 21 to 40%. Recommended vegetation for slopes above 40% is Aleurites moluccana. Latosol conservation for landslide mitigation can be optimized for soil fertility and productivity through the use of straw, leaves and banana peels.

HUBUNGAN KETERDAPATAN BATUAN KALK SILIKAT PADA ENDAPAN PORFIRI CU-AU BATU HIJAU, SUMBAWA, NUSA TENGGARA BARAT Widiarso, Dian Agus; Suprapto, Rachdian Eko; Winarno, Tri; Rakhman, Arie Noor
Jurnal Teknologi Vol 12 No 2 (2019): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

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Potensi sumber daya tembaga (Cu) dan Emas (Au) di Area Batu Hijau, Nusa Tenggara barat sangat melimpah. Batuan di Batu Hijau memiliki sistem endapan mineral berjenis porfiri Cu-Au dan potensi endapan penyerta berjenis skarn. Keterdapatan skarn ditunjukkan oleh interval batuan kalk silikat pada hasil pemboran batuan inti di Batu Hijau. Metode penelitian yang digunakan dalam penelitian adalah deskripsi batuan kalk silikat (pendataan megaskopis batuan inti dan analisis petrografi) dan analisis data sekunder fisikokimia. Batuan kalk silikat area penelitian terdiri dari variasi hornfels dan skarn dengan komposisi mineral kalk silikat, mineral sulfida dan mineral oksida. Secara spasial, batuan kalk silikat berada di zona proksimal endapan porfiri, persebaran setempat akibat kontrol struktur geologi, variasi kedalaman terdangkal batuan kalk silikat di area Barat 147,93 m dan di area Timur 205 m dengan interval terdalam di area barat -540,4 m dan area Timur -571,84 m. Secara genetik, skarnifikasi progradasi dan retrogradasi ekuivalen dengan zona alterasi potasik-filik (320Â° -280Â°C) dan fase awal profilitik (~280Â°C) dari zona alterasi endapan porfiri. Batuan kalk silikat memiliki korelasi spasial dan genetik dengan endapan porfiri Cu-Au.

REKAYASA GEOMEDIS PEMANFAATAN PASIR PANTAI DI PANTAI PARANGRITIS DAN SEKITARNYA, KECAMATAN KRETEK KABUPATEN BANTUL DAERAH ISTIMEWA YOGYAKARTA Rakhman, Arie Noor
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 1 Agustus 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v6i1.547

This research aims to utilize sand in Parangtritis Beach, Parangtritis Subdistrict, Kretek, Bantul regency, Yogyakarta Special Region. Utilization of sand with geomedical engineering as means therapy for valuable health sand and applicable scientific. The method used in the form of field data capture characteristic properties of sand to determine the effect of the physical properties of the sand to the sand as a medium utilizing health therapy, include: color, grain size, dust properties, mineral composition, geology and inundated the following conditions as the controller. Primary data field is supported by the analysis of laboratory data in the form of grain size distribution, density, magnetic properties, and secondary data relating to the application of sand therapy information. Composition of magnetic minerals (average 66.20%) were more abundant than non-magnetic mineral grain size and the dominance of fine-sized sand (0.425 to 0.075 mm) affects the temperature of radiant heat on the sand (41.4 to 42 Â°C). Utilization of hot sand is recommended for optimal therapy performed at 16:00 to 18:00 pm with sunny weather conditions. Application using a combination therapy of Egypt model and Tembolor Beach, Lombok. Sand therapy by using a parabolic sand dunes can be applied with local wisdom of the area. Sand retrieval can be done by reusing the small scale and limited. Barchan sand dune land use is not recommended in order to preserve its existence.

REKAYASA VEGETASI UNTUK KONSERVASI LAHAN RAWAN LONGSOR DI LEMBAH SUNGAI CENGKEHAN, KECAMATAN IMOGIRI, KABUPATEN BANTUL Rakhman, Arie Noor; -, Muchlis; Septyawan, Bayu Ade
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 2 Februari 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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This study aims to select vegetation as a landslide controller in the Cengkehan River Valley, Imogiri District, Bantul Regency, Special Region of Yogyakarta. It is adjusted to the characteristics and thickness of the landslide, the height, and slope of the morphology, the typical roots and the suitability of the community interest of the plant species. The slope of the valley is 15Â°-60Â° and 75-325 meters above sea level. Landslides are on the north cliff in the direction of landslides, N 234Â°E, along the morphological orientation directed at N324Â°E. Landslides are slides that combine with the movement of rocks (wedge failure). Landslide material results from weathering of basalt that the degree of weathering of rock is not continuous between levels III and V. The soil is eluvial sediment which is identified as latosol with thickness up to 2 meters. The recommended vegetation for shallow landslide type is deep-rooted vegetation. They are Dalbergia pinnata and Parkia speciosa, especially for land with slope between 21 to 40%. Recommended vegetation for slopes above 40% is Aleurites moluccana. Latosol conservation for landslide mitigation can be optimized for soil fertility and productivity through the use of straw, leaves and banana peels.

ANALISIS KUALITAS INTRUSI ANDESIT SEBAGAI BAHAN BANGUNAN BERDASARKAN SIFAT KETEKNIKAN DI DAERAH BEJI, KECAMATAN UNGARAN TIMUR, KABUPATEN SEMARANG, JAWA TENGAH Retongga, Nofrohu; Purnamawati, Dwi Indah; Rakhman, Arie Noor
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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This study aims to identify the quality of andesite intrusive rocks as a building material. The research location is in the Beji area, East Ungaran District, Semarang Regency, Central Java Province. Analysis of rock quality using data from the test results of engineering and petrographic properties. The andesite studied is an intrusion into basalt. Based on the quality standard requirements for natural stone for buildings (SNI 03-0394-1989) these rocks can be mined for building materials, especially medium to heavy building foundations (1,150.040 -1,421.621 kg/cm2). The middle andesite has a higher strength than the lower andesite. The strength of the rock is supported by resistant minerals in the form of plagioclase, which dominates up to 35%. However, in the andesite body getting down, olivine tends to decrease by 5%. The weathering of these minerals is influenced by the condition of the water in the rock where the water content is 0.391 to 0.412%. In water-saturated conditions, the degree of saturation of the lower rock can reach 100%, exceeding the rock above, 87.5%. The strength of the rock at the bottom is lower, making the slope potentially easy to collapse when the mining method is started from the bottom, especially the excavation is carried out on steep vertical slopes.

PERANAN SULFUR DIOKSIDA PADA PEMBENTUKAN KOROSI LOGAM DAN IMPLIKASINYA BAGI KESEHATAN MANUSIA DI GUNUNG LUMPUR, DESA KUWU, KECAMATAN KRADENAN, KABUPATEN GROBOGAN, PROPINSI JAWA TENGAH Arie Noor Rakhman
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 8 No 2 Februari 2016
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

This research aims to review the existence of sulfur dioxide result of the mud volcanoes Bledug Kuwu. Research sites in the Kuwu Area, Kradenan District, Grobogan Regency, Central Java Province. Utilization of research results for the potential of sulfur dioxide’s influence for human health by identification of the nature of corrosion metal formed. The method used in the form of field and laboratory, that was performed by comparing some of physical and chemical characteristic of mud and water. The determination supported by observation the nature of corrosion metal in the field. By recognizing geology medical condition following corrosion metal identification, its obtained benefit to analyze the potential an impairment of health and directive treatment. Farther away from the center of the mud volcano, the potential of sulphur gas pollution tends to be low. Sulphur content less than 73,83 ppm to 10,90 ppm. Pollution influenced by geogen and biogen, that it was identified from the growth of vegetation and corrosive metal existence. Vegetation can live starting 200 meters from the center of the mud volcano and fertile at more than 300 meters. This were in accordance with the existence of corrosion (rusts) on metal that its more vulnerable when approaching to the center of the mud volcano. Potential an impairment of health are irritation respiratory systems, irritation of the windpipe, acute toxicity for the old man and there are had the disease chronic in cardiovascular respiratory system. Hence tourist development should be accompanied by medical equipment, awareness of the use of mask to anticipate respiratory disorders, socialozation for visitors and the community of the most sensitive due to pollutants sulfur dioxide

PENELITIAN MIKRO DAN REKAYASA BATUGAMPING KALKARENIT DI DESA POLO DAN DESA BATNUN, KECAMATAN AMANUBAN SELATAN, KABUPATEN TIMOR TENGAH SELATAN, PROPINSI NUSA TENGGARA TIMUR Arie Noor Rakhman
Jurnal Teknologi Vol 1 No 2 (2008): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

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Tujuan penelitian ini adalah untuk menyelidiki dan merekayasa sumber daya batugamping kalkarenit di Desa Polo dan Desa Batnun, Kecamatan Amanuban Selatan, Kabupaten Timor Tengah Selatan, Propinsi Nusa Tenggara Timur. Penelitian ini menghasilkan peta isopach berskala 1:2.000 dalam bentuk diagram blok tiga dimensi. Dari pemetaan tersebut dapat dihitung cadangan batugamping kalkarenit yang dapat ditambang. Hasil analisis petrografi, kimia, fisik, dan analisis kekuatan batuan menunjukkan bahwa jenis batugamping kalkarenit tersebut telah memenuhi persyaratan mutu/kualitas Standarisasi Nasional Indonesia (SNI) dalam penggunaan sebagai batu hias pada dinding interior/eksterior bangunan.

Aplikasi Geofisika Terpadu Untuk Penelitian Potensi Air Tanah Aquifer Batu Pasir di Alasombo, Indonesia Fivry Wellda Maulana; Arie Noor Rakhman
Jurnal Multidisiplin Madani Vol. 2 No. 1 (2022): January 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

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The purpose of this study was to determine the potential of groundwater in Alasombo, Weru District, Sukoharjo Regency, Indonesia. The investigation has been carried out using geophysical methods that are integrated with surface geological data to obtain an interpretation of the hydrogeological control of the aquifer. The lithology of the aquifer is dominated by sandstone which controls its role as 2 types of aquifers, namely unconfined aquifers or free aquifers and semi-confined aquifers or semi-free aquifers. The geoelectrical section shows that the groundwater-carrying layer that functions as an aquifer is the sandstone layer in the second layer and sandstone in the base layer. As an artesian aquifer or a confined aquifer, sandstone aquifers have a water volume between 31.5 to 260 m3/day, in a northwest-southeast direction. In terms of the quality of the conductivity value of water in the field, below 1500 µs/cm is freshwater type groundwater that can be recommended as a source of clean water.

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