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"Bukit Intrusi Gunung Putri yang terletak di Kabupaten Bogor, Jawa Barat terdiri dari batuan beku yang berumur Miosen memiliki daya tarik sebagai objek geowisata yang perlu dilestarikan, dengan melakukan konservasi untuk membuat objek geowisata perlu adanya informasi menarik seperti bagaimana proses keterbentukan batuan di daerah tersebut sehingga perlu diteliti lebih lanjut tentang petrogenesisnya. Penelitian petrogenesis dilakukan dengan cara mengetahui karakternya, komposisinya, proses pembekuannya hingga lama waktu pembekuannya. Sepuluh sampel diambil secara acak berdasarkan persebarannya dan dianalisis dengan metode petrografi dan distribusi ukuran kristal. Hasil dari analisis petrografi menunjukkan bahwa berdasarkan klasifikasi IUGS (1973) karakteristik batuan termasuk ke dalam Olivine-Pyroxene Basalt/Andesite yang berasal dari magma basaltic yang bersifat mafic. Berdasarkan karakteristik batuan dan hasil dari analisis distribusi ukuran kristal menunjukkan bahwa daerah penelitian merupakan tubuh intrusi dengan jenis shallow intrusion laccolith yang mengalami proses petrogenesis terutama pada pembentukan mineral plagioklas pada batuan perubahan cooling rate, proses accumulation, dan proses increasing undercooling dengan waktu singgah pada fenokris rata – rata 83.93 tahun dan segmen mikrofenokris rata-rata 18.08 tahun.

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Intrusion Hill Gunung Putri, located in Bogor Regency, West Java, consists of Miocene-age igneous rocks and has attractions as a geotourism site that needs to be preserved. To establish it as a geotourism destination, it is important to provide interesting information about the rock formation processes in the area. Therefore, further research on its petrogenesis is needed. Petrogenesis research involves understanding its characteristics, composition, cooling processes, and the duration of the cooling period. Ten random samples were collected based on their distribution and analyzed using petrographic methods and crystal size distribution. The petrographic analysis results indicate that based on the IUGS (1973) classification, the rock characteristics fall into the category of Olivine-Pyroxene Basalt/Andesite, which originated from mafic basaltic magma. Based on the rock characteristics and the results of crystal size distribution analysis, the research area is identified as a shallow intrusion laccolith body that underwent petrogenesis processes, particularly in the formation of plagioclase minerals due to cooling rate changes, accumulation processes, and increasing undercooling. The average residence time of phenocrysts is approximately 83.93 years, while the average residence time of microphenocrysts is approximately 18.08 years."

"Desa Keranggan, Setu, Tangerang Selatan yang menjadi wilayah penelitian merupakan salah satu kawasan di Indonesia yang berpotensi longsor. Wilayah ini memiliki karakter tanah bergerak dengan adanya lereng yang sangat curam. Pada rumah-rumah warga di atas lereng timbul retakan sejajar lereng yang mengindikasikan adanya pergerakan tanah. Oleh karena itu dilakukan pengukuran geolistrik tahanan jenis 2 dimensi untuk mengetahui struktur litologi bawah permukaan yang berpotensi dapat berperan sebagai bidang gelincir. Pengukuran menggunakan konfigurasi Wenner-Schlumberger di 2 lintasan berarah Barat-Timur. Panjang lintasan 1 dan 2 secara berturut-turut adalah 117,5 dan 105 meter dengan jarak antar elektroda 2,5 meter. Dari hasil korelasi model tahanan jenis, data geologi regional, dan data sumur yang dikumpulkan dari sumur warga, diyakini bahwa litologi penyusun di wilayah penelitian terdiri dari litologi batu lempung, batu pasir, dan konglomerat batu apung yang merupakan bagian dari Formasi Serpong. Dari model tahanan jenis terindikasi adanya bidang gelincir dengan litologi batu lempung di atas konglomerat batu apung dengan kemiringan 53o tepat di bawah lereng. Diduga kuat bidang gelincir ini memicu terbentuknya lereng di permukaan dengan kemiringan serupa sekitar 53o. Kedua faktor tersebut diperparah dengan beban yang tinggi dari jumlah penduduk dan kendaraan di atasnya, serta getaran yang berasal dari aktivitas manusia sehari-hari.

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Keranggan Village, Setu, South Tangerang City which as research area is one of areas in Indonesia that has the potential of landslide. This area has the character of oil movement with very steep slope. In the houses of residents on the slope, cracks appear parallel to the slope that indicate soil movement. Therefore, we use geoelectrical measurements of 2- dimensional resistivity to determine the subsurface lithological structure that could act as a slip surface. The measurement using the Wenner-Schlumberger electrodes configuration on 2 lines with a West-East direction. The length of line 1 and 2 are 117.5 and 105 meters, with electrodes distance 2.5 meters. From the correlation between the resistivity model, regional geological data, and well data collected from resident wells, it is believed that the constituent lithology in the research area consists of claystone, sandstone, and pumice conglomerate which is part of the Serpong Formation. It is indicated that there is a slip surface that consist of claystone above pumice conglomerate with a slope of 53o just below the surface. This slip surface suspected triggers the formation of slope on the surface with a similar value of slope about 53o . Both of these factors are exacerbated by the high burden of the population and vehicles on it, as well as vibrations that come from daily human activities."

"Kabupaten Indramayu merupakan salah satu sentra padi Jawa Barat dengan 56 % wilayahnya berupa sawah. Namun beberapa tahun terakhir produktivitas padi berkurang karena terjadinya bencana kekeringan akibat musim kemarau panjang. Dinas Pertanian Kabupaten Indramayu mencatat bahwa pada tahun 2012, 2015 dan 2018 lahan sawah mengalami gagal panen yang disebabkan kekeringan sangat berat. Tujuan penelitian ini untuk mengetahui persebaran wilayah kekeringan pertanian lahan sawah tahun 2012, 2015 dan 2018 serta hubungannya dengan curah hujan, kemiringan lereng dan ketinggian di Kabupaten Indramayu. Indeks kekeringan VHI Vegetation Health Index digunakan untuk mengetahui persebaran wilayah kekeringan lahan pertanian. VHI merupakan kombinasi indeks VCI Vegetation Condition Index dan TCI Temperature Condition Index yang diperoleh dari pengolahan data NDVI Normalized Difference Vegetation Index dan LST Land Surface Temperature Citra Landsat 7 dan 8. Hasil pengolahan indeks VHI menunjukkan persebaran wilayah yang tidak mengalami kekeringan hingga kekeringan sangat berat pada wilayah pesisir pantai Kabupaten Indramayu. Sedangkan kategori tingkat kekeringan ringan berada pada wilayah barat bagian utara dan tengah Kabupaten Indramayu. Berdasarkan hasil uji statistik, terdapat hubungan yang signifikan antara curah hujan dengan kekeringan pada tahun pengamatan 2012, 2015 dan 2018. Sedangkan ketinggian dan lereng tidak ada hubungan signifikan dengan kekeringan.

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Indramayu Regency is one of the rice centers in West Java with 56 % of its area is rice fields. But in recent years rice productivity has been reduced due to drought that occurred in Indramayu Regency that caused by a shift of the beginning season and a long dry season. The Indramayu District Agriculture Office noted that in 2012, 2015 and 2018 paddy fields experienced crop failures due to very heavy drought.

The purpose of this study was to determine the distribution of 2012, 2015 and 2018 wetland agricultural drought areas and their relationship with rainfall in Indramayu Regency. The VHI drought index Vegetation Health Index is used to determine the pattern of distribution of the drought area of agricultural land. VHI is a combination of VCI Vegetation Condition Index and TCI Temperature Condition Index derived from NDVI data processing Normalized Difference Vegetation Index, LST Land Surface Temperature of Landsat 7 and 8 images.

The processing results of the VHI index show the distribution of drought levels no drought to extreme drought, where in 2012, 2015 and 2018 the distribution of drought in agricultural land has the same pattern, which is dominated by the coastal areas of Indramayu Regency due to the influence of less rainfall. While the level of mild drought is in the western and center regions of Indramayu Regency. Based on the results of statistical tests, there is a significant relationship between rainfall and drought in 2012, 2015 and 2018. Whereas altitude and slope dont have relationship with drought."

"Bencana alam merupakan fenomena alam yang dapat mengakibatkan kerugian. Berdasarkan data IRBI, Kab. Garut berada di posisi ke-12 dari 514 kabupaten/kota dengan indeks risiko tanah longsor tertinggi. Terdapat enam faktor utama penyebab longsor, yaitu curah hujan, kemiringan kelerengan, tanah jenis, jenis tutupan lahan, geologi, dan adanya getaran. penentuan zona patahan yang berpotensi menjadi sumber getaran atau gempa dapat diidentifikasi menggunakan data gravitasi.  Dengan memanfaatkan data gravitasi yang bersumber dari GGMplus, data gravitasi diolah hingga analisis derivatif untuk menentukan zona patahan. Data lain yang juga diolah adalah DEM serta data curah hujan. Peta hasil pengolahan kemudian dilakukan overlay dengan data tutupan lahan, geologi, dan jenis tanah untuk dilakukan pembobotan berdasarkan standar dari DVMBG yang telah dimodifikasi. Keberadaan zona patahan yang banyak terdapat di daerah selatan telah berhasil diidentifikasi dari data gravitasi dan dikonfirmasi dari Peta Geologi Lembar Garut. Hasil dari penelitian menunjukan bahwa daerah utara Kab. Garut memiliki tingkat kerawanan longsor yang lebih rendah dibandingkan daerah selatan dimana zona patahan yang telah teridentifikasi tersebar di bagian selatan Kab. Garut.

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Natural disasters are natural phenomena that can occur anywhere and anytime, so that they can result in material and non-material losses. Based on IRBI data, Kab. Garut is in the 12th position out of 514 districts/cities with the highest landslide risk index. There are six main factors that cause landslides, rainfall, slope level, soil density, type of land cover, geology, and vibration. the determination of fault zones that have the potential to be a source of vibration or earthquake can be identified using gravity data. By utilizing gravity data sourced from GGMplus, gravity data is processed to derivative analysis to determine fault zones. Other data that is also processed is DEM and rainfall data. The processed map is then overlaid with data on land cover, geology, and soil type for weighting based on the modified DVMBG standard. The existence of a fault zone that is mostly found in the southern area has been identified from the gravity data and confirmed from the Geological Map of the Garut Sheet. The results of the study show that the northern area of ​​Kab. Garut has a lower level of landslide susceptibility than the southern area where the fault zones that have been identified are scattered in the southern part of Kab. Garut."

"Penelitian ini menggunakan metode Ambient Noise Tomography (ANT) untuk menggambarkan model kecepatan grup gelombang Rayleigh pada bagian kerak atas Pulau Jawa yang memiliki kondisi tektonik yang kompleks. Data penelitian yang digunakan merupakan data waveform komponen vertikal dari 99 jaringan sensor seismik stasioner BMKG yang tersebar di Pulau Jawa pada tahun 2021. Pengolahan data waveform dilakukan mulai dari single data preparation, cross correlation dan stacking, analisis cross correlogram, pengukuran kurva dispersi, tomografi kecepatan dan yang terakhir adalah interpretasi hasil penelitian. Hasil inversi menghasilkan citra tomografi kecepatan grup gelombang Rayleigh pada kerak atas di wilayah Pulau Jawa berkisar antara 1,88 km/s hingga 2,60 km/s dan umumnya meningkat dengan bertambahnya periode pengukuran di wilayah Pulau Jawa. Penelitian ini berhasil mengidentifikasi patahan – patahan dan zona gunung api di Pulau Jawa dengan jelas yang berada pada wilayah batas kontras zona anomali kecepatan rendah dan zona anomali kecepatan tinggi.

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This study uses the Ambient Noise Tomography (ANT) method to describe the velocity model of the Rayleigh wave group in the upper crust of Java Island which has complex tectonic conditions. The research data used is vertical component waveform data from 99 BMKG stationary seismic sensor networks distributed on Java Island in 2021. Waveform data processing is carried out starting from single data preparation, cross correlation and stacking, cross correlogram analysis, dispersion curve measurements, velocity tomography and the last is the interpretation of the research results. The inversion results produce a tomographic image of the Rayleigh wave group velocity in the upper crust in the Java Island region ranging from 1.88 km/s to 2.60 km/s and generally increases with increasing measurement period in the Java Island region. This research has succeeded in clearly identifying faults and volcanic zones in Java Island which are located in the contrasting boundary of the low velocity anomaly zone and the high velocity anomaly zone."

"Penelitian ini membahas mengenai identifikasi faktor utama yang menjadi penyebab terjadinya peristiwa tanah longsor di Kota dan Kabupaten Sukabumi serta menentukan zona rawan bencana berdasarkan kelas-kelasnya yang disajikan dalam bentuk peta kerawanan bencana. Penelitian ini dilakukan dengan menggunakan metode analisis bivariat, yaitu menguji parameter independen berupa data titik keterjadian longsor terhadap parameter-parameter dependen yang diindikasikan menjadi penyebab terjadinya tanah longsor tersebut, diantaranya kemiringan lereng, litologi, tutupan lahan, vegetasi, kedekatan dengan kelurusan dan sungai, curah hujan dan kurvatur. Hasil penelitian menjelaskan bahwa parameter yang paling berpengaruh dalam keterjadian bencana longsor adalah parameter litologi, karena memiliki nilai Area Under Curve (AUC) terbesar dibanding parameter lainnya yaitu 0,823. Hasil penelitian juga menjelaskan bahwa potensi terjadinya longsor terbesar adalah pada bulan Desember dengan nilai AUC total 0,96 yang diperoleh dari campuran beberapa parameter yang sudah tervalidasi, yang memiliki nilai AUC > 0,6, yaitu litologi, tutupan lahan, dan curah hujan. Lokasi sebaran kejadian bencana tanah longsor dominan berada di wilayah utara daerah penelitian. Hasil penelitian ini menyarankan pada pembaca untuk memperhatikan tiga parameter tersebut sebelum melakukan proyek pembangunan di wilayah Kota dan Kabupaten Sukabumi.

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This research discusses the identification of the main factors that caused the occurrence of landslides in the City and District of Sukabumi and determines disaster-susceptibility zones based on their classes and presented in the form disaster susceptibility map. This research was conducted using the bivariate analysis method, which tested the independent variables in the form of landslide point data on the dependent variables indicated to be the cause of the landslide, including slope, lithology, land cover, vegetation, closeness to lineaments and rivers, rainfall and curvature. The results of the study explained that the most influential variable in the occurrence of landslides was the lithology factor, because it has 0.823 Area Under Curve (AUC) value, the largest one compared to other variables. The results also explained that the biggest potential for landslides was in December with a total AUC value of 0.96 obtained from a mixture of several validated variables, which had an AUC value> 0,6, those are lithology, land cover, and rainfall. The dominant landslide disaster distribution location is in the northern area of the study area. The results of this study suggest to the reader to pay attention to these three variables before carrying out development projects in the City and Sukabumi Districts."

"Pulau Jawa merupakan salah satu bagian penting dari kompleks geologi Indonesia dan memiliki sejarah geologi yang sangat kompleks. Salah satu wilayah di Jawa yang terkena dampak dari aktivitas tektonik tersebut adalah Jawa Tengah. Mengingat Jawa Tengah sendiri merupakan Provinsi dengan penduduk ketiga terbanyak di Indonesia, maka diperlukan penelitian untuk mengidentifikasi struktur geologi yang terjadi akibat aktivitas tektonik tersebut terutama terhadap potensi bencana alam, khususnya gempa bumi. Penelitian ini menggunakan metode gravitasi dengan data gravitasi Topex. Hasil penelitian menunjukkan setidaknya terdapat 7 sesar di daerah penelitian dengan kedalamanan zona regional sedalam 15,37 km dan kedalaman zona residual sedalam 1,45 km. Penelitian ini juga dapat memetakan daerah dengan risiko bencana gempa bumi yang tinggi, yaitu daerah di sekitar Sesar Opak.

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Java Island is one of the important parts of the geological complex of Indonesia and has a very complex geological history. One of the regions in Java affected by tectonic activities is Central Java. Considering that Central Java itself is the third most populous province in Indonesia, research is needed to identify the geological structures resulting from these tectonic activities, especially regarding the potential for natural disasters, particularly earthquakes. This research uses the gravity method with Topex gravity data. The research results indicate that there are at least 7 faults in the study area with a regional zone depth of up to 15.37 km and a residual zone depth of 1.45 km. This research can also map areas with high earthquake disaster risk, particularly the areas around the Opak Fault."

"[ABSTRAKKajian dilakukan dengan menganalisis seluruh komponen biaya yang mempengaruhiketetapan harga CNG, dengan simulasi Monte Carlo dengan bantuan perangkat lunakCrystal Ball yang mengacu pada kebijakan pemerintah berupa Peraturan MenteriESDM Nomor 19 Tahun 2010 yang telah menetapkan formula harga jual bahan bakargas untuk transportasi dengan mempertimbangkan harga di titik penyerahan (hulu),toll fee, investasi SPBG, biaya pengoperasian dan pemeliharaan SPBG, margin danpajak. Pada Kajian ini mengupas toll fee dengan memilih supply chain yang dianggaptepat untuk wilayah Jawa Bagian Barat. Hasil Kajian Harga CNG untuk RegionalJawa Bagian Barat, dimana simulasi dilakukan di wilayah DKI Jakarta didapatkanbahwa Keputusan Menteri Energi dan Sumber Daya Mineral Nomor: 2932K/12/MEM/2010: ?Harga Jual Bahan Bakar Gas yang digunakan untuk Transportasidi Wilayah Jakarta termasuk Bogor, Bekasi, Depok dan Tangerang adalah Rp3.100,00 (tiga ribu seratus rupiah) untuk tiap 1 (satu) Liter Setara Premium (LSP)termasuk pajak-pajak.? merupakan harga kompetitif yang dapat dilaksanakan untukwilayah Jawa bagian Barat. Dilihat dari hasil rekalkulasi yaitu harga CNG padatapping point Bitung sebesar $. 0.223 atau Rp. 2819,82 dan harga aggregasi sebesarRp. 2737,58 dengan harga riil berada pada rentang harga Rp.1857,43 hingga Rp.3890,32 (berdasarkan Indeks Harga Konsumen April 2015) dan pada wilayah tapingpoin Nagrak sebesar $. 0.209 atau Rp. 2631,02 dan harga aggregasi sebesar Rp.2795,51 dengan harga riil berada pada rentang harga Rp.2227,59 hingga Rp. 4533.44.

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ABSTRACTThe study was conducted by analyzing all the components that affect the cost of provision of CNG price, with a Monte Carlo simulation with the help of Crystal Ball software which refers to government policies such as the Minister of Energy and Mineral Resources Regulation No. 19 of 2010, which has set the pricing formula of gas fuel for transportation by considering the price at the point of delivery (upstream), toll fee, SPBGs investment, operating and maintenance costs SPBGs, margins and taxes. On This study peeling toll fee by choosing supply chain that is considered appropriate for the region Western of Java. Study results CNG price to Regional Java, where the simulation is done in Jakarta found that the Decree of the Minister of Energy and Mineral Resources No. 2932 K / 12 / MEM / 2010: "Selling Price Gas Fuel used for transportation in Jakarta area including Bogor, Bekasi, Depok and Tangerang is $ 3100.00 (three thousand one hundred dollars) for every 1 (one) liter Premium Equivalent (LSP), including taxes. "a competitive price that can be implemented for the region western of Java. Judging from the results of recalculation is the price of CNG at the tapping point Bitung of $. 0.223 or Rp. 2819.82 and aggregation price of Rp. 2737.58 with the real price is in the range of price Rp.1857, 43 up to Rp. 3890.32 (based on the Consumer Price Index April 2015) and in the region of Nagrak tapping points. $.0.209 or Rp. 2631.02 and aggregation price of Rp. 2795.51 with the real price is in the range of price Rp.2227,59 up to Rp.4533.44.;The study was conducted by analyzing all the components that affect the cost of provision of CNG price, with a Monte Carlo simulation with the help of Crystal Ball software which refers to government policies such as the Minister of Energy and Mineral Resources Regulation No. 19 of 2010, which has set the pricing formula of gas fuel for transportation by considering the price at the point of delivery (upstream), toll fee, SPBGs investment, operating and maintenance costs SPBGs, margins and taxes. On This study peeling toll fee by choosing supply chain that is considered appropriate for the region Western of Java. Study results CNG price to Regional Java, where the simulation is done in Jakarta found that the Decree of the Minister of Energy and Mineral Resources No. 2932 K / 12 / MEM / 2010: "Selling Price Gas Fuel used for transportation in Jakarta area including Bogor, Bekasi, Depok and Tangerang is $ 3100.00 (three thousand one hundred dollars) for every 1 (one) liter Premium Equivalent (LSP), including taxes. "a competitive price that can be implemented for the region western of Java. Judging from the results of recalculation is the price of CNG at the tapping point Bitung of $. 0.223 or Rp. 2819.82 and aggregation price of Rp. 2737.58 with the real price is in the range of price Rp.1857, 43 up to Rp. 3890.32 (based on the Consumer Price Index April 2015) and in the region of Nagrak tapping points. $.0.209 or Rp. 2631.02 and aggregation price of Rp. 2795.51 with the real price is in the range of price Rp.2227,59 up to Rp.4533.44.;The study was conducted by analyzing all the components that affect the cost of provision of CNG price, with a Monte Carlo simulation with the help of Crystal Ball software which refers to government policies such as the Minister of Energy and Mineral Resources Regulation No. 19 of 2010, which has set the pricing formula of gas fuel for transportation by considering the price at the point of delivery (upstream), toll fee, SPBGs investment, operating and maintenance costs SPBGs, margins and taxes. On This study peeling toll fee by choosing supply chain that is considered appropriate for the region Western of Java. Study results CNG price to Regional Java, where the simulation is done in Jakarta found that the Decree of the Minister of Energy and Mineral Resources No. 2932 K / 12 / MEM / 2010: "Selling Price Gas Fuel used for transportation in Jakarta area including Bogor, Bekasi, Depok and Tangerang is $ 3100.00 (three thousand one hundred dollars) for every 1 (one) liter Premium Equivalent (LSP), including taxes. "a competitive price that can be implemented for the region western of Java. Judging from the results of recalculation is the price of CNG at the tapping point Bitung of $. 0.223 or Rp. 2819.82 and aggregation price of Rp. 2737.58 with the real price is in the range of price Rp.1857, 43 up to Rp. 3890.32 (based on the Consumer Price Index April 2015) and in the region of Nagrak tapping points. $.0.209 or Rp. 2631.02 and aggregation price of Rp. 2795.51 with the real price is in the range of price Rp.2227,59 up to Rp.4533.44., The study was conducted by analyzing all the components that affect the cost of provision of CNG price, with a Monte Carlo simulation with the help of Crystal Ball software which refers to government policies such as the Minister of Energy and Mineral Resources Regulation No. 19 of 2010, which has set the pricing formula of gas fuel for transportation by considering the price at the point of delivery (upstream), toll fee, SPBGs investment, operating and maintenance costs SPBGs, margins and taxes. On This study peeling toll fee by choosing supply chain that is considered appropriate for the region Western of Java. Study results CNG price to Regional Java, where the simulation is done in Jakarta found that the Decree of the Minister of Energy and Mineral Resources No. 2932 K / 12 / MEM / 2010: "Selling Price Gas Fuel used for transportation in Jakarta area including Bogor, Bekasi, Depok and Tangerang is $ 3100.00 (three thousand one hundred dollars) for every 1 (one) liter Premium Equivalent (LSP), including taxes. "a competitive price that can be implemented for the region western of Java. Judging from the results of recalculation is the price of CNG at the tapping point Bitung of $. 0.223 or Rp. 2819.82 and aggregation price of Rp. 2737.58 with the real price is in the range of price Rp.1857, 43 up to Rp. 3890.32 (based on the Consumer Price Index April 2015) and in the region of Nagrak tapping points. $.0.209 or Rp. 2631.02 and aggregation price of Rp. 2795.51 with the real price is in the range of price Rp.2227,59 up to Rp.4533.44.]"

"Pinggiran Sungai Ciliwung menjadi sebuah kawasan padat penduduk dikarenakan pemandangannya yang indah serta harga tanah yang murah. Namun ternyata terdapat gua bawah tanah pada tebing pinggiran sungai tersebut. Gua bawah tanah ini terbentuk akibat pengambilan pasir oleh manusia sejak dahulu. Oleh karenanya, hal ini merupakan sebuah ancaman bila terdapat banyak bangunan di atasnya. Jika dinding gua tidak kuat menahan beban di atasnya, akan terjadi bencana seperti sinkhole yang dapat mengakibatkan banyak korban. Adanya gua bawah tanah berisi udara pada pinggiran sungai yang memiliki nilai resistivitas mencapai 1500 m membuat kontras nilai resistivitas yang sangat jauh dibandingkan sekitarnya. Karena itu, metode resistivitas dengan konfigurasi dipole-dipole digunakan dalam penelitian ini agar dapat mendeteksi keberadaan dan kontinuitas gua bawah tanah tersebut. Agar dapat terlihat dengan jelas kontinuitasnya, pada penelitian ini terdapat 5 buah lintasan dengan jarak spasi antar elektroda sepanjang 2 meter. Berdasarkan hasil pengolahan data yang telah diambil, terdeteksi adanya anomali gua bawah tanah dengan ukuran tinggi dan lebar 1,5x1,5 meter serta nilai resistivitas berkisar antara 1400-1500 m serta dapat diperkirakan kontinuitasnya.

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Ciliwung River ridge becomes a densely populated area due to its beautiful scenery and cheap land prices. But apparently there is an underground cave on the cliff edge of the river. This underground cave was formed due to sand taking by humans from the past. Therefore, this is a threat if there are many buildings on it. If the cave wall is not strong to hold the burden on it, there will be a disaster like sinkhole that can lead to many victims. The existence of an air filled underground cave on the edge of the river that has a resistivity value reaching 1500 m makes the contrast of resistivity value very far compared to its surroundings. Therefore, the resistivity method with dipole dipole array is used in this study in order to detect the existence and continuity of the underground cave. To be clearly visible continuity, in this research there are 5 pieces of line with spacing between electrode along the 2 meters. Based on the results of data processing has been taken, the cave underground anomalies detected with a height and width of 1,5x1,5 meters and resistivity value ranges between 1400 1500 m and can be estimated continuity."