DOCSLIB.ORG

Analisis Kestabilan Lereng Di Daerah Lulut, Kecamatan Klapanunggal, Kabupaten Bogor, Provinsi Jawa Barat

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Analisis Kestabilan Lereng Di Daerah Lulut, Kecamatan Klapanunggal, Kabupaten Bogor, Provinsi Jawa Barat Journal of Geoscience Engineering & Energy (JOGEE) Vol.1 No.1 Februari 2020 Analisis Kestabilan Lereng di Daerah Lulut, Kecamatan Klapanunggal, Kabupaten Bogor, Provinsi Jawa Barat “Analysis of Slope Stability in Lulut Area, Klapanunggal District, Bogor Regency, West Java Province” Dikky Putra Rupawan1,*, Hidartan1 1 Prodi Teknik Geologi, Fakultas Teknologi Kebumian dan Energi, Universitas Trisakti Jl. Kyai Tapa No.1, Jakarta Barat, 11440, Indonesia *)Email korespondensi: [email protected] Sari. Penambangan batugamping merupakan salah satu usaha kegiatan pemanfaatan sumber daya alam non logam yang ekonomis untuk bahan bangunan. Kegiatan penambangan batu gamping dilakukan dengan metode penambangan kuari berjenjang. Tujuan dari penilitian ini untuk mengetahui kondisi geologi serta kestabilan lereng dengan mencari nilai faktor keamanan lereng berdasarkan korelasi data Rock Mass Rating (RMR) dengan metode Janbu berdasarkan sifat fisik batuan. Metodelogi penelitian ini menggunakan tahapan pengambilan data lapangan berupa kondisi geologi serta geologi teknik dan pengujian sampel laboratorium berupa uji direct shear dan uji kuat tekan, selanjutnya pengolahan data dilakukan dengan menggunakan software Rockscience slide 6.0 serta perhitungan secara manual berdasarkan metode Janbu.Hasil uji laboratorium berupa nilai rata-rata kohesi (±6,19 Mpa), sudut gesek dalam (±30,14°), dan uji kuat tekan (±10,902 Mpa). Berdasarkan metode Janbu dan perhitungan secara manual, daerah penelitian ini memiliki nilai faktor keamanan lereng aktual sebesr 0,575 yang dikategorikan labil serta berpotensi terjadi longsoran rotasi. Kata kunci: Faktor keamanan; Geologi teknik; Kestabilan lereng. Abstract. Limestone mining is one of the economic activities of utilizing non-metallic natural resources for building materials. Limestone mining activities are carried out using the tiered quarry mining method. The purpose of this research is to determine the geological conditions and the stability of the slope by finding the value of the slope safety factor based on the correlation of Rock Mass Rating (RMR) data with the Janbu method based on the physical properties of the rock. The methodology of this study uses the stages of field data collection in the form of geological conditions and engineering geology and laboratory sample testing in the form of direct shear tests and compressive strength tests, then data processing is performed using Rockscience slide 6.0 software and manual calculations based on the Janbu method. Laboratory test results in the form of values average cohesion (± 6.19 Mpa), deep friction angle (± 30.14 °), and compressive strength test (± 10.902 Mpa). Based on Janbu's method with calculation manually, this research area has an actual slope safety factor value of 0.575 which is categorized as unstable and has the potential for landslide rotations. Keywords: Engineering Geology; Safety Factor; Slope Stability. dilakukan dengan metode penambangan kuari PENDAHULUAN berjenjang. Hal itu membuat dibentuknya lereng Penambangan batugamping merupakan salah sebagai proses dan hasil dari kegiatan satu usaha kegiatan pemanfaatan sumber daya penambangan. Penelitian ini dilakukan di area alam non logam yang ekonomis untuk bahan pertambangan Quarry E PT Indocement Tunggal bangunan. Kegiatan penambangan batugamping Prakarsa Tbk blok 295 daerah lulut, Kecamatan 21 Journal of Geoscience Engineering & Energy (JOGEE) Vol.1 No.1 Februari 2020 Klapanunggal, Kabupaten Bogor dengan Ciremai di Kuningan merupakan batas antara melakukan pembobotan Rock Mass Rating dan Zona Bogor dengan Zona Bandung. analisis kestabilan lereng menggunakan metode Janbu berdasarkan pemetaan geologi dan geologi teknik permukaan. Hasil dari penelitian ini diharapkan dapat memberikan kontribusi terhadap perusahan agar mengurangi tingkat kecelakaan kerja di lapangan. GEOLOGI REGIONAL Formasi Klapanunggal (Tmk) termasuk kedalam peta geologi regional lembar Bogor oleh A.C Effendi, Dkk (1998). Formasi ini merupakan cekungan sedimen yang termasuk kedalam Cekungan Jawa Barat Utara. Formasi ini berumur Miosen akhir yang menjemari Gambar 1. Stratigrafi Regional Cekungan Bogor, dengan Formasi Jatiluhur (Tmj) seperti yang Cekungan Jawa Barat Utara, dan Pegunungan Selatan. (Sujanto dan Sumantri, 1977). dapat dilihat pada gambar 1. Formasi Klapanunggal terdiri atas Batugamping terumbu METODE PENELITIAN padat dengan Foraminifera besar dan fosil - fosil Geologi Teknik lainnya termasuk moluska dan echinodermata. Geologi teknik merupakan cabang ilmu Menurut Van Bemmelen (1949) dalam The geologi yang menggunakan informasi geologi Geology of Indonesia Fisiografi regional untuk memecahkan rekayasa keteknikan. Formasi Klapanunggal termasuk ke dalam Zona Sebagai ilmu terapan, geologi teknik Bogor yang membentang dari Rangkasbitung memfokuskan pada aspek geologi yang melalui Bogor, Purwakarta, Subang, Kuningan berpengaruh pada lokasi, desain, konstruksi dan dan Majalengka. Daerah ini terdapat suatu pengoperasian atau pemeliharaan pekerjaan Antiklinorium yang terbentuk dari hasil batuan rekayasa. Yang dipelajari dalam geologi teknik 1984). Pola-pola struktur geologi yang terbentuk yaitu aspek geomorfologi, aspek batuan atau sedimen laut membentuk perbukitan lipatan. tanah, struktur geologi, aspek hidrogeologi Terdapat patahan lembang pada zona ini yang (Dearman, 1991). Sebagai bagian dari geologi diperkirakan sezaman dengan pengangkatan teknik terdapat Rock Mass Rating yang dipakai pegunungan selatan. Sekarang perbukitan untuk mengetahui nilai ketahanan suatu massa rendah dengan batuan keras yaitu volcanik neck batuan dan disajikan dalam bentuk kualifikasi atau batuan intrusi seperti Gunung Parang di kualitas suatu massa batuan (Arif, I., 2016). Plered Purwakarta, Gunung Kromong, dan Gunung Buligir sekitar Majalengka. Gunung 22 Journal of Geoscience Engineering & Energy (JOGEE) Vol.1 No.1 Februari 2020 Klasifikasi massa batuan menggunakan sistem RMR dapat dibagi menjadi 5 parameter yaitu : Metode Janbu Janbu biasa digunakan untuk kondisi lereng a. Uniaxial Compressive Strength (UCS) aktif dengan merumuskan persamaan umum b. Rock Quality Designation (RQD) c. Spasi bidang diskontinu kesetimbangan dengan menyelesaikan secara d. Kondisi bidang diskontinu vertikal dan horizontal pada dasar tiap-tiap irisan e.Kondisi dari air tanah dengan memperhitungkan seluruh kesetimbangan gaya. Metode ini memiliki Kestabilan Lereng asumsi bahwa gaya normal antar irisan Kondisi geologi daerah setempat diperhitungakan tetapi gaya geser antar irisan mempengaruhi kestabilan dari suatu lereng pada diabaikan atau bernilai nol (XL-XR= 0) kegiatan penampabangan, bentuk keseluruhan sebagaimana dinyatakan dalam persamaan 1 lereng pada lokasi tersebut, kondisi air tanah (Arif, I., 2016). setempat, faktor luar seperti getaran akibat peledakan ataupun alat mekanis yang beroperasi 퐅퐊 = sec 훼2 Σ(푐. 푏 + (푤 − 푢. 푏)tan휃) dan juga dari teknik penggalian yang digunakan 1 + tan훼 tan휃/퐹 (1) dalam pembuatan lereng. Faktor pengontrol ini Σ 푊 tan 훼 dimana: jelas sangat berbeda untuk situasi penambangan FK = Faktor Keamanan yang berbeda dan sangat penting untuk W = berat isi (b x h x ϒ) memberikan aturan yang umum untuk c = kohesi efektif ɸ’ = sudut geser dalam efektif menentukan seberapa tinggi atau seberapa landai ɑ = sudut irisan suatu lereng untuk memastikan lereng itu akan b = lebar irisan tetap stabil yang ditentukan berdasarkan nilai u = tekanan air pori faktor keamanan lereng sesuai dengan Kepmen HASIL DAN PEMBAHASAN ESDM 1827 K/30/MEM/2018 seperti yang Hasil akhir penelitian ini dipengaruhi oleh dapat dilihat pada tabel 1. ketersedian data yang lengkap. Semakin lengkap Tabel 1. Nilai Faktor Keamanan dan Probabilitas data yang didapatkan maka hasil akhir akan Longsor Lereng Tambang (Kepmen ESDM 1827 akurat. Data yang digunakan berupa data K/30/MEM/2018) geologi, geomorfologi dan geologi teknik berupa Kriteria dapat diterima (Acceptance Criteria) Keparahan Probabilitas Rock Mass Rating dan uji direct shear. Faktor Longsor Faktor Keamanan Longsor Jenis Lereng Keamanan (Consequences of (FK) Dinamis (Probability of (FK) Statis Failure/ CoF) (min) Failure) (maks) (Min) Geomorfologi Daerah Penelitian PoF (FK≤1) Lereng tunggal Rendah s.d. Tinggi 1,1 Tidak ada 25-50% Rendah 1,15-1,2 1 25% Penentuan satuan geomorfologi pada Inter-ramp Menengah 1,2-1,3 1 20% Tinggi 1,2-1,3 1,1 10% penelitian ini menggunakan klasifikasi bentuk Rendah 1,2-1,3 1 15-20% Lereng Keseluruhan Menengah 1,3 1,05 10% muka bumi (Bandono dan Budi Brahmantyo, Tinggi 1,3-1,5 1,1 5% 2006). Daerah penelitian seperti yang dapat 23 Journal of Geoscience Engineering & Energy (JOGEE) Vol.1 No.1 Februari 2020 dilihat pada gambar 2 dibagi menjadi 3 satuan dan Operculina spp) maka dapat disimpulkan yaitu : lingkungan pengendapan satuan ini menurut 1. Satuan Geomorfologi Perbukitan Karst Bandy (1967) adalah inner neritic. Secara Konikal Klapanunggal sayatan petrografi warna cokelat, terdapat 2. Satuan Geomorfologi Perbukitan Karst mineral opak 7%, Matriks berupa Mikrit 60%, Klapanunggal Semen berupa sparry calcit, Kemas berupa mud 3. Satuan Geomorfologi Dataran Karst supported, Bentuk butir subrounded (Dunham Klapanunggal 1962). 2. Satuan Batugamping Packstone Kedudukan stratigrafi batugamping packstone pada daerah ini merupakan yang termuda berdasarkan rekonstruksi penampang. Ditemukan fosil foraminifera planktonic (Globigerinatella Insueta, dan Praeorbulina Glomerusa). yang terdapat dalam bentuk tabel umur berikut, maka dapat disimpulkan umur dari Gambar 2. Peta geomorfologi daerah penelitian
Load more

Recommended publications
  • Kesesuaian Penataan Ruang Dan Potensi Investasi Di Kabupaten Bogor
    KESESUAIAN PENATAAN RUANG DAN POTENSI INVESTASI DI KABUPATEN BOGOR Frans Dione Institut Pemerintahan Dalam Negeri [email protected] ABSTRACT Bogor Regency is a district that is geographically close to the Capital City, Jakarta. This position and the potential of natural resources makes Bogor District have a great opportunity to develop investment. Investment will come into an area if the spatial policy is made in line and congruent with the potential of the investment development. This is very important for investors, because of it involves support from local government and going concern of the business. The main problem of this research is whether the spatial policy is accordance with the investment potential? This research is a descriptive research using qualitative approach. Empirical exploration is done through desk study and focus group disscusion. In addition, a prospective analysis is conducted which is analyzing strategic issues in investment development that can produce solutions for future decision makers. The results showed that there is suitabilty in spatial policy with the potential of empirical investment of each subregion. The suitability can be seen from 9 (nine) prospective investment sectors in Bogor Regency which are agriculture, fishery, animal husbandry, forestry, mining, tourism, infrastructure, industry and trade. For recommendations, the local government of Bogor Regency have to determine the superior product or commodity for each susbregion and establish priority scale for each investment sector. Keywords: spatial arrangement, potential investment, regional development. PENDAHULUAN Pembangunan suatu wilayah tidak akan lepas dari faktor endowment atau potensi yang dimilikinya. Pesatnya perkembangan Kabupaten Bogor merupakan hasil pemanfaatan potensi yang dimiliki dengan didukung oleh investasi yang ditanamkan baik oleh investor dalam maupun investor luar negeri, serta tidak lepas dari upaya pemerintah daerah dan peran serta dunia usaha yang ada di wilayah Kabupaten Bogor.
    [Show full text]
  • ENHANCING EARLY WARNING SYSTEM in the UPPER BEKASI WATERSHED THROUGH the EMPLOYMENT of HYDROMETEOROLOGICAL MODEL Nizam Mawardi S2454033
    MASTER THESIS ENHANCING EARLY WARNING SYSTEM IN THE UPPER BEKASI WATERSHED THROUGH THE EMPLOYMENT OF HYDROMETEOROLOGICAL MODEL Nizam Mawardi S2454033 MASTER OF ENVIRONMENTAL & ENERGY MANAGEMENT Dr. Kris Lulofs Dr. Gül Özerol Prof. Chay Asdak 2020/2021 ABSTRACT Hydrometeorological disasters often occur around the world, including floods due to overflowing rivers. One of them is the flood in urban areas in the Upper Bekasi watershed, West Java Province, Indonesia. The selected flood-prone area is located between two tributaries, namely the Cileungsi river and the Cikeas river. Early warning systems were established to reduce the risk of flooding. However, the flood incident due to heavy rain that lasted for a long time on 1 January 2020 was classified as very severe and caused significant damages. To improve preparedness, this study uses a new hydrometeorological model, WRF-Hydro. This study aims to provide insight into the existing early warning in the study area, analyze the response to actions taken by the community and local disaster management agencies, and test WRF-Hydro's ability to simulate torrential rain. This study uses an exploratory approach to describe the early warning system that existed and an experimental approach to test the model's capabilities. This study shows how WRF-Hydro can be optimized for use by competent authorities to improve the flood early warning system. ii ACKNOWLEDGMENTS First and utmost, all praise is to Allah for the blessing to accomplish this thesis throughout difficult situations. I would like to thank my supervisor Dr. Kris Lulofs for relentlessly supporting and providing me with his knowledge and generosity throughout the development of this thesis.
    [Show full text]
  • Kepgub Bogor UM TPT 2019 English
    GOVERNOR OF WEST JAVA DECREE NUMBER: 561/Kep.344-Yanbangsos/2019 CONCERNING SPECIAL MINIMUM WAGE FOR TEXTILE AND TEXTILE PRODUCT MANUFACTURERS IN BOGOR DISTRICT YEAR 2019 THE GOVERNOR OF WEST JAVA, Considering : a. whereas Bogor District is one of teritories with the biggest potential of export-to-europe-oriented textile and textile products in West Java Province; b. whereas in order to maintain business continuity, to prevent termination of employment relations, factory closedown and factory relocation of the textile and textile product manufacturers in Bogor District, it is necessary to set a special minimum wage for textile and textile product manufacturers; c. whereas based on the considerations as referred to in letters a and b, it is necessary to stipulate the Governor of West Java Decree concerning Special Minimum Wage for Textile and Textile Product manufacturers in the territory of Bogor District Year 2019; In view of : 1. Law Number 11 of 1950 concerning the Establishment of West Java Province (State Gazette of the Republic of Indonesia dated 4 July 1950) jo. Law Number 20 of 1950 concerning The Government of Great Jakarta (State Gazette of the Republic of Indonesia Year 1950 Number 31, Supplement to the State Gazette of the Republic of Indonesia Number 15) as amended several times, the latest of which by Law Number 29 of 2007 concerning Provincial Government of Jakarta Capital Special Region as the Capital of the Unitary State of the Republic of Indonesia (State Gazette of the Republic of Indonesia Year 2007 Number 93, Supplement to the State Gazette of the Republic of Indonesia Number 4744) and Law Number 23 of 2000 concerning the Establishment of Banten Province (State Gazette of the Republic of Indonesia Year 2000 Number 182, Supplement to State Gazette of the Republic of Indonesia Number 4010); 2.
    [Show full text]
  • Landslide Susceptibility Assessment Using Frequency Ratio Model In
    Silalahi et al. Geosci. Lett. (2019) 6:10 https://doi.org/10.1186/s40562-019-0140-4 RESEARCH LETTER Open Access Landslide susceptibility assessment using frequency ratio model in Bogor, West Java, Indonesia Florence Elfriede Sinthauli Silalahi1,3* , Pamela2 , Yukni Arifanti2 and Fahrul Hidayat3 Abstract Landslides are common natural disasters in Bogor, Indonesia, triggered by a combination of factors including slope aspect, soil type and bedrock lithology, land cover and land use, and hydrologic conditions. In the Bogor area, slopes with volcanic lithologies are more susceptible to failure. GIS mapping and analysis using a Frequency Ratio Model was implemented in this study to assess the contribution of conditioning factors to landslides, and to produce a landslide susceptibility map of the study area. A landslide inventory map was prepared from a database of historic landslides events. In addition, thematic maps (soil, rainfall, land cover, and geology map) and Digital Elevation Model (DEM) were prepared to examine landslide conditioning factors. A total of 173 landslides points were mapped in the area and randomly subdivided into a training set (70%) with 116 points and test set with 57 points (30%). The relation- ship between landslides and conditioning factors was statistically evaluated with FR analysis. The result shows that lithology, soil, and land cover are the most important factors generating landslides. FR values were used to produce the Landslide Susceptibility Index (LSI) and the study area was divided into fve zones of relative landslide susceptibil- ity. The result of landslide susceptibility from the mid-region area of Bogor to the southern part was categorized as moderate to high landslide susceptibility zones.
    [Show full text]
  • Water Quality Impacts of the Citarum River on Jakarta and Surrounding Bandung Basin
    Water Quality Impacts of the Citarum River on Jakarta and Surrounding Bandung Basin Senior Thesis Submitted in partial fulfillment of the requirements for the Bachelor of Science Degree At The Ohio State University By Coleman Quay The Ohio State University 2018 Table of Contents Abstract .......................................................................................................................................................... i Acknowledgements ....................................................................................................................................... ii Introduction ................................................................................................................................................... 1 Physical Setting ............................................................................................................................................. 2 Location of the Study Area ....................................................................................................................... 2 Climate ...................................................................................................................................................... 3 Hydrology ................................................................................................................................................. 7 Geology ..................................................................................................................................................... 8 Water Resources
    [Show full text]
  • Preliminary Mapping of Posdaya Performance As Family Empowerment Program
    Journal of Sustainable Development; Vol. 7, No. 6; 2014 ISSN 1913-9063 E-ISSN 1913-9071 Published by Canadian Center of Science and Education Preliminary Mapping of Posdaya Performance as Family Empowerment Program Pudji Muljono1 1 Faculty of Human Ecology, Bogor Agricultural University, Indonesia Correspondence: Pudji Muljono, Kampus IPB Darmaga, Bogor, Indonesia. E-mail: [email protected]; [email protected] Received: August 18, 2014 Accepted: September 9, 2014 Online Published: November 4, 2014 doi:10.5539/jsd.v7n6p18 URL: http://dx.doi.org/10.5539/jsd.v7n6p18 Abstract Posdaya is a model of family empowerment to revive the mutual cooperation culture to build human resources through active participation in the family. Posdaya performance can be assessed from several aspects, including aspects of secretarial, partnerships, education, economic, health and environmental aspects. Although Posdaya has grown quite well, but so far there has been no attempt to map Posdaya performance in Indonesia. The objectives of the study were to assess the performance of Posdaya in term of its secretarial, partnerships, education, economics, health, and the environment aspects. Based on the results of the study note that Posdaya is lack of its performance in partnership, economy and environment. Whereas for the growth status of Posdaya, they were classified into five category of Posdaya, namely potential Posdaya category, dinamic Posdaya category, productive Posdaya category, creative Posdaya category, and innovative Posdaya category. The results showed that of the 50 Posdaya studied, it turns out 54% including productive Posdaya category, 30% are categorized as creative Posdaya category, and 16% are dynamic Posdaya category. There is no Posdaya with potential and innovative category.
    [Show full text]
  • LAPORAN Keberlanjutan 2018 PT Indocement Tunggal Prakarsa Tbk
    2018 Performance Highlights Ikhtisar Kinerja 2018 Laporan Berkelanjutan Sustainability Report 2018 Management Report Laporan Manajemen Profil Perusahaan Profil Company Profile Together Uncover the Potentials | Together Analisis dan Pembahasan Manajemen Management Discussion and Analysis Bersama, Mengelola Potensi Good Corporate Governance Tata Kelola Perusahaan Tata Tanggung Jawab Sosial Perusahaan Tanggung Corporate Social Responsibility Together, Uncover Laporan Keuangan the Potentials Financial Report Bersama, Mengelola Potensi SUSTAINABILITY REPORT 2018 PT INDOCEMENT TUNGGAL PRAKARSA Tbk. i Together, Uncover the Potentials Bersama, Mengelola Potensi “Bersama, Mengelola Potensi” di 2018 menjadi momen “Together, Uncover the Potentials” in 2018 was an penting bagi Perseroan untuk lebih mendekatkan diri important moment for the Company to get closer to kepada pemangku kepentingan dan bersama-sama stakeholders and together maximized our potential. For memaksimalkan potensi yang dimiliki. Untuk pelanggan, customers, we developed cement terminals and train kami mengembangkan terminal semen dan melatih sales force to have Indocement’s presence closer with tenaga pemasaran untuk mendekatkan kehadiran its best services. Together with the Government and the produk Indocement melalui layanan terbaik. Bersama society of West Java Province, we also working together Pemerintah dan masyarakat Provinsi Jawa Barat, kami in the Final Garbage Processing Plant (TPPAS) Regional juga menjalin kerja sama pada Proyek Tempat Pengolahan in village of Nambo and Lulut to utilize around 1,500 tons dan Pemrosesan Akhir Sampah (TPPAS) Regional di of waste per day as refuse derived fuel (RDF). In addition, desa Nambo dan Lulut untuk memanfaatkan sekitar in the Continuous Emission Monitoring System (CEMS) 1.500 ton sampah per hari sebagai refuse derived fuel program of the Ministry of Environment and Forestry, Plant (RDF).
    [Show full text]
  • Waste Management in the Cooperation Prospective Between Local Governments in Indonesia Case of Regional Cooperation in West Java Province, Indonesia
    Michikazu Kojima, “Toward Regional Cooperation of Local Governments in ASEAN”, ERIA Collaborative/Support Research Report, IDE-JETRO, 2019 Chapter 7 Waste management in the cooperation prospective between local governments in Indonesia Case of regional cooperation in West Java Province, Indonesia Enri Damanhuri1 Abstract: Cooperation between districts/cities as part of regional autonomy in Indonesia aims to accelerate the realization of people's welfare through services improvement and community empowerment. Some of the common problems related to public services are low quality of services, unclear service standards, and low service accountability. Regional autonomy in Indonesia was born after the social upheaval in 1998, which was preceded by the economic crisis that hit Indonesia around 1997. After this crisis, there were problems related to the constitutional system and regional demands. Subsequently, the discourse of regional autonomy was rolled out as an alternative answer to the sociopolitical problems. The principle of regional autonomy was initially applied in Indonesia based on Law No. 22/1999 concerning Regional Government; it was replaced by Law No. 23/2014. Regional autonomy provides an opportunity to regions to empower their respective regions for the welfare of the people and be given the authority to regulate their own regions. In the context of municipal solid waste management, the Law No. 18/2008 encourages collaboration between regional governments for addressing waste problems, especially, in the construction and operation of joint facilities that may function as regional final disposal facilities. The Sarbagita Regional Cooperation was the first successfully developed regional facility in early 2001 to manage the Suwung landfill site; it was jointly initiated and managed by four local governments that have a common 1 Faculty of Civil and Environmental Engineering – ITB, Jalan Ganesa 10 – Bandung 40132 – Indonesia.
    [Show full text]
  • Carbonate Reef of the Klapanunggal Formation in the Bogor Trough, West Java
    JOURNAL OF GEOLOGICAL SCIENCES AND APPLIED GEOLOGY VOL.2, NO.1 APRIL 2017 CARBONATE REEF OF THE KLAPANUNGGAL FORMATION IN THE BOGOR TROUGH, WEST JAVA Abdurrokhim Dept. of Geology, Universitas Padjadjaran – Indonesia [email protected] Abstract The Late Miocene shelf-margin carbonate reef is well exposed in the study area, and named as Klapanunggal Formation. The formation is characterized mainly by thick and massive reefal limestone with large foraminifers and other types of shell fragments, such as mollusks and echinoderms, and it have been developed in a response to the decrease in sediment discharge superimposed by relative rise in sea level during the late Miocene. Keyword: carbonate, Klapanunggal Formation, rimmed reef, shelf margin, Bogor Trough Background among the geologists of the oil The late Miocene carbonate of the companies, especially those working Klapanunggal Formation is well in the Northwest Java Basin, is also observed in the Cibinong area, well known as the Parigi Formation northeastwards from Bogor City (Fig. 2). This formation is overlaid (Fig.1). The formation is overlaying conformably by mudstone dominated conformably middle Miocene Jatiluhur of Cisubuh Formation (Bukhari et al., Formation (Effendi, Kusnama, & 1992; Yaman et al., 1991). Hermanto, 1998; Sudjatmiko, 1972) Parigi Formation developed during (Fig. 2). The late Miocene carbonate the late Miocene (Burbury, 1977; is one of main target reservoir in the Bukhari et al., 1992) on stable North West Java Basin, and the study shallow-marine platforms as a of this formation have been buildup reef complex associated with conducted by many researchers (e.g. an adjacent paleohigh. The paleohigh Bukhari et al.
    [Show full text]
  • The Role of Branchless Banking in Performance of Households' Micro
    114 Ktut Silvanita Mangani et al. ISSN 2071-789X RECENT ISSUES IN ECONOMIC DEVELOPMENT Mangani, K.S., Syaukat, Y., Arifin, B., & Tambunan, M. (2019). The role of branchless banking in performance of households’ micro and small enterprises: The evidence from Indonesia. Economics and Sociology, 12(3), 114-131. doi:10.14254/2071-789X.2019/12-3/8 THE ROLE OF BRANCHLESS BANKING IN PERFORMANCE OF HOUSEHOLDS’ MICRO AND SMALL ENTERPRISES: THE EVIDENCE FROM INDONESIA Ktut Silvanita Mangani, ABSTRACT In Indonesia, branchless banking (BB) for low- Universitas Kristen Indonesia, income communities is a new financial channel to create Jakarta, Indonesia a financial system accessible to all levels of society. This E-mail: [email protected] research aims to investigate how to develop BB programs to improve the performance of households’ micro and Yusman Syaukat, small enterprises (MSEs) in rural areas. The data was Bogor Agricultural University, collected from 97 MSEs who conducted financial Bogor, Indonesia transactions at BB agents. For a case study, as many as 32 E-mail: [email protected] agents out of 360 BB agents in Bogor District, West Java, Indonesia were chosen purposively from 13 sub-districts. Bustanul Arifin, Then, 97 MSEs were chosen with the experience of Universitas Lampung, Lampung, conducting transactions through BB agents. The study Indonesia analyzes the household economic behavior using the E-mail: [email protected] model of a simultaneous structural equation, that has not been discussed in prior literature on Branchless Banking Mangara Tambunan, studies. The study has found that an increase in the value Bogor Agricultural University, of financial transactions and investment variables have a Bogor, Indonesia positive impact with larger magnitudes on the production E-mail: and other endogenous variables than an increase of those [email protected] variables independently.
    [Show full text]
  • Persebaran Gua Dan Morfometri Endokarst Di Kawasan Karst Tajur-Klapanunggal, Kabupaten Bogor, Jawa Barat
    UNIVERSITAS INDONESIA PERSEBARAN GUA DAN MORFOMETRI ENDOKARST DI KAWASAN KARST TAJUR-KLAPANUNGGAL, KABUPATEN BOGOR, JAWA BARAT SKRIPSI IRA MEGAWATI GUNAWAN PUTRI 0606071563 FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM DEPARTEMEN GEOGRAFI JULI 2010 Persebaran gua..., Ira Megawati Gunawan Putri, FMIPA UI, 2010 UNIVERSITAS INDONESIA PERSEBARAN GUA DAN MORFOMETRI ENDOKARST DI KAWASAN KARST TAJUR-KLAPANUNGGAL, KABUPATEN BOGOR, JAWA BARAT SKRIPSI Diajukan sebagai salah satu syarat untuk memperoleh gelar sarjana sains IRA MEGAWATI GUNAWAN PUTRI 0606071563 FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM DEPARTEMEN GEOGRAFI DEPOK JULI 201 i Persebaran gua..., Ira Megawati Gunawan Putri, FMIPA UI, 2010 ii Persebaran gua..., Ira Megawati Gunawan Putri, FMIPA UI, 2010 iii Persebaran gua..., Ira Megawati Gunawan Putri, FMIPA UI, 2010 KATA PENGANTAR/UCAPAN TERIMA KASIH Puji syukur saya panjatkan kepada Tuhan Yang Maha Esa, karena atas berkat dan rahmat-Nya, saya dapat menyelesaikan skripsi ini. Penulisan skripsi ini dilakukan dalam rangka memenuhi salah satu syarat untuk mencapai gelar Sarjana Sains Jurusan Geografi pada Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia. Saya menyadari bahwa, tanpa bantuan dan bimbingan dari berbagai pihak, dari masa perkuliahan sampai pada penyusunan skripsi ini, sangatlah sulit bagi saya untuk menyelesaikan skripsi ini. Oleh karena itu, saya mengucapkan terima kasih kepada: (1) Dra. Astrid Damayanti, M.Si dan Drs. Supriatna, MT, selaku dosen pembimbing yang telah menyediakan waktu, tenaga dan pikiran
    [Show full text]
  • The Contribution of Human Activities to Subsurface Environment Degradation in Greater Jakarta Area, Indonesia
    SCIENCE OF THE TOTAL ENVIRONMENT 407 (2009) 3129– 3141 available at www.sciencedirect.com www.elsevier.com/locate/scitotenv The contribution of human activities to subsurface environment degradation in Greater Jakarta Area, Indonesia Robert M. Delinoma,⁎, Abdurrahman Assegafb, Hasanuddin Z. Abidinc, Makoto Taniguchid, Dadan Suhermana, Rachmat Fajar Lubise, Eko Yuliantoa aResearch Centre for Geotechnology, Indonesian Institute of Sciences, Jln. Cisitu - Sangkuriang, Bandung 40135, Indonesia bGeological Department, Trisakti University, Jln. Kyai Tapa No. 1, Jakarta 11440, Indonesia cGeodesy Research Division, Faculty of Civil and Environmental Engineering, Institute of Technology Bandung, Jln. Ganesha 10, Bandung 40132, Indonesia dResearch Institute for Humanity and Nature, 457-4 Motoyama, Kamigamo, Kitaku, Kyoto 603-8047, Japan eGraduate School of Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan ARTICLE DATA ABSTRACT Available online 13 December 2008 This study examines the factors of human activities causing environmental stresses on the subsurface environments in the urban settings of Jakarta. A major objective of this study is Keywords: to identify the basin geometry and estimate how critical is the degradation of the subsurface Jakarta environment within the basin, and it covered micro-palaeontology and chemical analyses, Micro-palaeontology the decrease of water level, and GPS data. New data on shallow groundwater quality is Water quality provided and the results indicate strong evidence for human activities have influenced the Groundwater degradation of the Jakarta subsurface environment. Urbanization © 2008 Elsevier B.V. All rights reserved. Dense population Land subsidence 1. Introduction of all to match water quality to end use. Despite the threats from potentially polluting activities, groundwater is often surpris- In 2001, the UNEP (United Nations Environment Program) ingly resilient, and water quality over a large area of the world produced its third UNEP Global Environment Outlook, Geo 3 remains good.
    [Show full text]