cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
Geological Engineering E-Journal
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Geological Engineerinb E-Journal menerima artikel-artikel yang berhubungan dengan Geologi Umu, Geologi Migas, Geologi Teknik, Panasbumi, dan Air Tanah.
Arjuna Subject : -
Articles 170 Documents
 2   3   4   5   6 
Studi Mikrofasies dan Diagenesis Batuan Karbonat Formasi Poh, Cekungan Luwuk - Banggai, Kecamatan Pagimana, Kabupaten Luwuk, Provinsi Sulawesi Tengah Khorniawan, Wahyu Budhi
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.489 KB)

Abstract

Formasi  Poh  merupakan  salah  satu  Formasi  yang  diendapkan  pada  zaman  tersier  dalam cekungan Luwuk – Banggai, Sulawesi Tengah. Cekungan ini sangat menarik karena semua batuan dari yang berumur pra tersier hingga sekarang ini dapat tersingkap di lapangan. Formasi Poh mempunyai susunan litogi berupa batugamping dengan sisipan batulanau karbonatan. Penelitian ini bertujuan untuk menentukan mikrofasies dan lingkungan pengendapan batuan karbonat, mengetahui proses diagenesis yang berkembang serta lingkungan diagenesis batuan karbonat, menentukan umur relatif berdasarkan kelimpahan foraminifera besar   pada batuan, dan yang terakhir menentukan dinamika sikuenstratigrafi berdasarkan data mikrofasies yang terdiri dari data petrografi dan paleontologi yang teramati. Metodologi yang digunakan dalam penelitian adalah metode deskriptif dan metode analisis. Metode deskriptif yang dilakukan menguji hipotesis, membuat prediksi serta mendapatkan manfaat dari suatu masalah yang ingin dipecahkan, sedangkan untuk metode analisis yang digunakan  adalah  analisis  petrografi,  analisis  mikrofasies,  analisis  foraminifera  besar  dan analisis sikuenstratigrafi. Analisis mikrofasies dilakukan untuk menginterpretasi fasies, lingkungan pengendapan, tipe platform, proses dan lingkungan diagenesis, sedangkan analisis foraminifera  besar  diperlukan  untuk  menentukan  umur  batuan.  Berdasarkan  hasil  analisis tersebut dibuatlah kolom zonasi fasies yang disusun secara vertikal untuk memudahkan pendeteksian stacking pattern dari sebuah parasequence set. Dari hasil pengamatan sayatan tipis didapatkan 13 tipe dari batuan karbonat berdasarkan klasifikasi Dunham (1962), yang dimodifikasi Flugel (2010) , yaitu: Bioclast Large Foram Packstone, Bioclast Plangtonik Forams Packstone, Bioclast Plangtonik Forams Packstone with Quartz, Bioclast Red Algae Wackstone, Bioclast Red Algae Grainstone, Packstone with Dolomitation, Ooid Grainstone, Ooid Packstone, Bioclast Coral Rudstone, Bioclast Milliolids Grainstone, Bioclast Plangtonik Forams Packstone with Microspar, Interdeterminate Bioclast Packstone, dan Bioclast Red Algae Packstone with Microspar. Ke tigabelas tipe batuan tersebut tersebar kedalam 6 zonasi fasies Wilson (1975), yakni FZ 1 Deep Sea, FZ 3 Toe-Of-Slope Apron (Deep Shelf Margin), FZ 4 slope, FZ 5 Platform-Margin Reefs, FZ 7 Open Marine, dan FZ 8 Platform Interior – Restricted. Lingkungan pengendapan dari singkapan batuan karbonat ini adalah shallow marine shelf  dengan bentuk platform berupa rimmed carbonate.  Proses diagenesis yang berkembang diantaranya semen isopach yang menandai lingkungan marine phreatic, terbentuknya circumgranular cement yang menandai lingkungan meteoric phreatic, serta pertumbuhan mineral equant calcite, deformasi butiran, dan neomorfisme yang menandai lingkungan burial. Umur relatif singkapan menunjukkan kisaran umur P21 sampai N11 yaitu Oligosen  Akhir    -  Miosen  Tengah.  Data  yang  terkumpul  dari  analisis  sayatan  ini  dapat digunakan untuk mengidentifikasi sikuen pada batas parasequence set yang menunjukkan agradasi dan retrogradasi stacking pattern, dari sebuah system tracts yang diperkirakan sebagai transgressive system tracts dan highstand system tracts.
PEMODELAN PEMASANGAN PENYANGGA SEMENTARA MENGGUNAKAN PERANGKAT LUNAK PHASE 2 PADA HEADRACE TUNNEL CHAINAGE 155 M – 265 M DI PLTA TULIS KABUPATEN BANJARNEGARA, JAWA TENGAH Fathoni, Muhammad Rais
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1297.091 KB)

Abstract

The tunnel is a copy below the ground or mountains. The tunnel was built aims to ensure a continuity of a system in theform of the transfer or objects from one place to another. Tulis Hydro Power Station is located in the Village Sokaraja,District Pagentan, Banjarnegara regency, Central Java. In the construction of Tulis Hydropower, made headrace tunnelthat serves as a time tunnel leading Merawu upstream dam plan Maung. In the construction of the tunnel, it is necessary as an alternative modeling in analysis and evaluation. Finite elementmethod is a numerical solution method, which in geomechanics used to determine the stress field and the displacementof rock mass modulus of elasticity or deformation if known by the behavior of the rock mass deformation is applied.Phase software program is a program designed for the purpose 2D finite element analysis of the process of excavation.Rock mass displacement in the tunnel was calculated using a software program Phase2. Meanwhile, as a supporter ofthe parameter values used to obtain the required form Roclab software. The parameters used in the calculation includethe tunnel geometry, boundary conditions, the main stress on the tunnel, geological conditions, the material around thetunnel, physical and mechanical properties of rocks, rock strength parameters that include the type material and thefailure criteria, the installation of a tunnel support along the physical and mechanical properties of the tunnel support . Tunnel support systems were installed in the tunnel includes rockbolt, wire mesh and steel support. While theinstallation of a tunnel support modeling used in the form rockbolt, shotcrete and liner. Determination of a tunnelsupport combinations based on the values and classes that are the result RMR rock mass classification. Simulation results show the total displacement of the excavation to be done after the installation of the a tunnel supportis as follows: 1. Simulation results chainage 198 m to the rock mass class IIIb, elastic material types for m 0.0117161 - 0.0113736 m2. Simulation results chainage 205 m to the rock mass class IIIa, elastic material types for m 0.0122892 - 0.0119034 m3. Simulation results chainage 230 m to the rock mass class IIa, elastic material types for m 0.0119481 - 0.0116411 m4. Simulation results chainage 250 m to the rock mass class IIb, elastic material types for m 0.0103595 - 0.0100815 mBased on the fourth simulation results show the number of damaged elements ranging from 8 to 23 damaged elements. The simulation results based on the finite element indicates stability can be said to be stable tunnel.
HUBUNGAN KONDISI GEOLOGI TERHADAP ALTERASI HIDROTERMAL DAN MINERALISASI PADA ENDAPAN EPITERMAL DAERAH BUNIKASIH, KECAMATAN TALEGONG, KABUPATEN GARUT, PROVINSI JAWA BARAT Rahmawati, Saumi; Nugroho, Hadi; Widiarso, Dian Agus; Verdiansyah, Okky
Geological Engineering E-Journal Vol 5, No 2 (2013): Volume 5, Nomor 2, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4060.569 KB)

Abstract

Hydrothermal alteration is a changed in the mineral composition of the rock as a result of interaction of hydrothermal fluids with the wall rock involving various geological environments like fault zones and volcanic eruptions zones. Hydrothermal alteration has a very close relationship with the mineralization. Mineralization is a process of inclusion of valuable rare minerals in rocks that form ore deposits. The purpose of this study is to determine the geological conditions of the mapping area and knowing the type of alteration and the relationship between alteration with the developing of ore mineralization. Research methods include field observations survey and continued by analysis methods, conducted in Bunikasih and surrounding areas, Talegong District, Garut regency, West Java. Methods of analysis undertaken include petrology, petrography, Terraspec, and structure analysis. Geological conditions of the study area consists geomorphological unit of structural steep hills and undulating hills of volcanic units (Van Zuidam, 1983). The research area is composed by rocks from old to young volcanic breccia, Andesite Lava, and tuff. Geological structures that are left slip fault of North Cibaliung, right slip thrust fault of South Cibaliung, right slip normal fault of Citutugan-Cibaliung Beet. There are prophylitic alteration (smectite, chlorite, ±illite), argillic (kaolinite, illite, smectite), advanced argillic (kaolinite, illite, alunite, silica), and silicification (vein zone). In the study area there are two types of epithermal, low sulfidation epithermal zone on Bunikasih mineralized was found that quartz manganese vein, chalcedonic vein, crustiform-colloform banded vein, and disseminated pyrite. there are 5 main vein lines with 40-100cm of thickness with a northwest-southeast direction formed on andesite and tuff, due to the style of the extensions that form the structure openings fault trending Northwest-Southeast. At high sulphidation epithermal indication zone in Datarkorot is dominated by advanced argillic alteration. Mineralization occurred is in the disseminated pyrite form and the concentrated hematite oxide mineral, goethite, and jarosite is a condition of changing sulfide mineral acids. Mineralization is controlled by lithology, by tuff unit which is interpreted lithocap of a diaterme breccia generated by a dacite porphyry intrusion.
PEMETAAN BAWAH PERMUKAAN DAN ANALISIS PERSEBARAN RESERVOIR PADA FORMASI TALANGAKAR AREA LAPANGAN RARASWARI CEKUNGAN JAWA BARAT UTARA. STUDI KASUS : BATUPASIR TAF-3 OLIGOSEN AKHIR Nugraha, Dhimas Aditya
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1358.46 KB)

Abstract

Oil and gas industry in Indonesia still plays an important role in supporting the countrys development program. Therefore, it is still necessary oil and gas production continuously. Special studies that will provide more detail kostribution in the development of  an oil and gas field. Research areas of oil field development studies lies in the reservoir silisiklastik sediment, Talangakar Formation, North West Java Basin.Purpose of this research, among others, identify formations characteristics, identify depositional environment, facies, and petroleum system of Raraswari field, identify conditions and distribution of reservoir based on log corelation and subsurface map, know the value of the potential reserves and give location of new development well at Raraswari field. The method that is used in this research are descriptive and analysis method. Researcher did log analysis, seismic analysis, and subsurface map analysis. Software that is used to support this research are Geoframe, Geolog, Seisearth XV, and Geodepth.Based on log analysis, lithology which being reservoir is sandstone TAF-3 Late Oligocene and has shale volume 23%, porosity 11.9%, and water saturation 26%. Based on elektrofacies analysis,  sandstone TAF-3 identified as distributary channel facies and deposited in the delta plain environment. Based on subsurface map analysis, sandstone TAF-3 deposited in lower surface, in the midle to northwest area of Raraswari Field. Generation occurs in the Talangakar Formation. Source rock are shale with organic rich and coal streak. Hidrocarbon’s migration has lateral direction from north to the south and trapped by structural and stratigraphy trap. Structural trap formed by normal fault and seal rock lithology is shale. Based on volumetric calculation, potential reserves is known for 2,272,935.983 STB and location of development well on the coordinates x = 107 ° 56 xx.xx "E, y = 6 ° 17 xx.xx" in depth 2800 m to 2820 m. 
MITIGASI SIAGA BENCANA GERAKANTANAH DENGAN PERANGKAT EARLY WARNING SYSTEM (EWS) DAERAH BUKIT MANYARAN PERMAI KECAMATAN GUNUNG PATI SEMARANG JAWA TENGAH Purwanti, Fitri
Geological Engineering E-Journal Vol 5, No 2 (2013): Volume 5, Nomor 2, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.868 KB)

Abstract

Mass movement cause catastrophic losses are not small, in addition to loss of property is sometimes also cause human fatalities. Mass movement incident requires ongoing disaster relief efforts ( disaster management), includes a planned and organized effort embodied in a series of activities undertaken to eliminate ( minimize ) some or all of the harm or loss caused by the disaster, as well as avoiding the risk of disasters that might occur, so that the impact can be reduced, or minimized, even if it may be omitted ( Sutikno, 2001). One way is by providing early warning for areas prone to mass movement. Installation of monitoring early detection mass movement intended as a means of mitigation efforts in providing an early warning signal / beginning of the communities living around the disaster -prone areas in order to be able to evacuate mass movement early so as to minimize casualties in the event of disaster mass movement / landslides. Early warning tool is set on a sliding distance tolerance of 3 ( three ) mm, 6 ( six ) mm then 9 ( nine ) mm. The spacing can be changed according to the characteristics of each region .Observations were made by means of geological mapping which aims to determine the location of the geological conditions in the area of Perumahan Manyaran Bukit Permai, Gunungpati, Semarang and instalation tools of early warning system, by means of a sensor exstensiometer and rainfall. Mass movement type contained in the study area in the form creeping and views of fields including the landslides rotation (rotational slides) and by including the slow-motion speed (very slow). It is influenced by several factors such as claystone lithology of conditions including in the formation of the hoist. Mudstone properties are easy to inflate (expansive clay) caused the landslide .Early Warning System ( EWS ) is a device that consists of several components, such as modems, local monitoring engine, digital landslide meter, battery, solar panel, regulator, rain gauge, and ancillary equipment. Landslide EWS is a monitoring system that is specifically designed to detect events that preceded the landslide in time to issue a warning immediately and initiate mitigation measures .At research area is an area of vulnerability mass movement intermediate level, mitigation in accordance with the recommendation that the condition Perumahan  Manyaran Bukit Permai. Mass movement can tackle disaster in the following manner: 1. Manufacture of gabions in the northern part of the study area, intended as a buffer on the slopes, except that its happening mengihindari erosion on the creek bank. 2. Control of water channel function to minimize the water that goes into the surface. 3. Grouting with the aim of closing the open discontrution, cavities and holes in the layer intended to improve soil strength .
PENINGKATAN DAYA DUKUNG TANAH DENGAN METODE GROUTING : STUDI KASUS KALI SEMARANG, JAWA TENGAH Aksono, Rahadian
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (185.086 KB)

Abstract

Kali Semarang in Semarang city will be constructed embankment. The result of soil investigation by sondir or cone penetration test (CPT) was obtained in the form of very soft clay to soft clay and has low soil bearing capacity. This may in turn damage the embankment which will be built because of a decline slowly building embankment. So it need the compaction soil by compaction grouting for increasing soil density and soil bearing capacity.The purpose of the research is to know the soil types and soil bearing capacity in areas of research by sondir / CPT data, determining the grouting implementation methods improving very soft soil forces, determining the soil type changes after grouting, and comparing the soil bearing capacity value before and after grouting.The method used in this research is the soil investigation by using the cone penetration test (CPT) or sondir. CPT before grouting has been done 3 points by Sondir-1, Sondir-2, and Sondir-3, while CPT after grouting has been done by Sondir-1. Afterwards, the CPT’s data was processed dan analysed by using the software of Corel Draw X4, Microsoft Exel 2007.The results of the processing and analysis of data is clay soil until depth of 20 meters. Very soft clay is in the depth of 14 meters and soft clay is in the depth of  20 meters. The soil types is very soft clay and soft clay.Therefore, it is necessary done compaction by compaction grouting. In term of increasing soil bearing capacity, grouting gave the effect of change in soil types at the grouting point in the depths of 14 meters to be sandy silt, 20 meters to be  the silty sand, and 3,6-3,8 meters to be sandy silt. Soil bearing capacity at 30ty day after the grouting was around from 29,13–79,00 ton/m2 atau 2,91–7,9 kg/cm2 and the average sondir result was 49,10 ton/m2,whereas before the grouting result was around 20,10–28,00 or 2,01–2,8 kg/cm2and for the average result was 23,25 ton/m2. 
STUDI STRUKTUR GEOLOGI DAN LITOLOGI MENGGUNAKAN METODE PEMETAAN GEOLOGI BERBASIS PENGINDERAAN JAUH PADA BLOK KOLBANO, PULAU TIMOR, NUSA TENGGARA TIMUR Pandelisman, Helnaria Fermi
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1593.395 KB)

Abstract

Pulau Timor merupakan bagian dari Busur Banda yang terletak antara Laut Savu dan LautTimor dan berada pada zona tumbukan antara tepi barat laut benua Australia yang bergerak ke utaradengan lempeng samudera Indo-Australia dan Laut Banda. Ekspresi struktur geologi yang terekamdalam relief dan topografi daerah Blok Kolbano dikaji dengan metode pemetaan geologi berbasispenginderaan jauh. Citra satelit Landsat 7-ETM+ diintegrasi dengan DEM SRTM untukmengidentifikasi struktur geologi dan satuan litologi, pengukuran tegasan utama terbesar jugadilakukan untuk menunjang interpretasi sistem sesar di daerah penelitian. Tujuh satuan batuan sedimen berumur Perm sampai Miosen, dan struktur geologi berupa antiklin, sinklin, sesar naik, sesar mendatar, dan sesar normal berhasil diidentifikasi dalam penelitianini. Sistem sesar yang berkembang di daerah penelitian merupakan sistem sesar naik dengan tipeimbrikasi yang diperlihatkan oleh umur batuan yang menunjukan kecenderunganyounging (tuamuda)dari sesar naik tertua dan keberadaan lipatan – lipatan di antara lembaran sesar – sesar naik daerah penelitian. Tegasan utama terbesar daerah penelitian adalah Timur laut - Barat daya atau cenderung ke arah NNE – SSW. Hasil yang diperoleh dari penelitian ini disusun dalam SistemInformasi Geografis (SIG) yang menggunakan citra satelit Landsat 7- ETM+ terkoreksi sebagai petadasar sehingga terjaga secara georefrensi.
ANALISIS POTENSI ALIRAN AIRTANAH BERDASARKAN DELINEASI NILAI PERMEABILITAS SEKUNDER, PADA TAMBANG BAWAH PERMUKAAN, CIURUG CENTRAL L. 500, UNIT BISNIS PERTAMBANGAN EMAS, PT. ANEKA TAMBANG TBK, PONGKOR, KABUPATEN BOGOR, JAWA BARAT Iklima, Neli Nikla; Pudjihardjo, Henarno; Widiarso, Dian Agus; Purnama, Yosep
Geological Engineering E-Journal Vol 5, No 2 (2013): Volume 5, Nomor 2, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3367.006 KB)

Abstract

Kegiatan penambangan emas yang dilakukan oleh PT. Aneka Tambang Tbk, yang berlokasi di Desa Bantar Karet, Kabupaten Bogor, Jawa Barat, berupa pertambangan tertutup, yaitu pembuatan terowongan bawah tanah untuk pengambilan bijih emas. Penghancuran bijih emas dilakukan dengan metode blasting (peledakan) yang dilakukan pada dinding terowongan yang kerap menimbulkan masalah yang sulit diatasi, yaitu airtanah yang tiba-tiba keluar dengan debit tertentu. Akumulasi dari airtanah akan membentuk genangan air, terutama air yang keluar dengan debit besar, akan sangat mengganggu aktifitas pertambangan seperti gangguan aktivitas pekerja serta gangguan lingkungan seperti banjir.Untuk mengatasi permasalahan airtanah dalam terowongan bawah tanah diperlukan kajian hidrogeologi untuk mengetahui potensi aliran airtanah, berdasarkan besarnya nilai permeabilitas sekunder. Nilai permeabilitas sekunder didapatkan melalui metode scanline, yaitu metode pengukuran rekahan dengan membentangkan tali pada dinding terowongan yang terdapat banyak rekahan dengan panjang dan kemiringan tertentu. Rekahan yang terpotong oleh bentangan tali tersebut diukur besar strike dan dip-nya, serta diamati karakteristik rekahannya, seperti bukaan rekahan (aperture), jarak (spasi), kemenerusan (lenght), material pengisi, bentuk (shape), dan kekasaran (rough).Metode scanline dilakukan pada dinding terowongan yang basah, meneteskan air, dan mengalirkan air. Pada lokasi ramp down (jalur menurun) elevasi 450 (RY – 01), didapatkan hasil permeabilitas rata-rata sebesar 3.6 x 10-4 m/s. Untuk dinding yang teraliri oleh air, nilai permeabilitas yang didapat adalah nilai permeabilitas tertinggi yaitu 2.6 x 10-3 m/s. Sedangkan untuk akses ramp down elevasi 500 (RY – 02) didapatkan nilai permeabilitas yang lebih rendah yaitu 1.3 x 10-5 m/s. Potensi aliran airtanah tertinggi berada pada lokasi RY-01 yaitu STA 3 dan STA 6. Pada kedua stasiun pengamatan ini ditemukan aliran airtanah dengan debit yang kecil, dan untuk STA 6 merupakan akumulasi arah aliran airtanah pada peta kontur MAT. Berdasarkan nilai permeabilitas sekunder dan karakteristik rekahan dari kedua lokasi ini, lokasi RY – 01 memiliki potensi yang lebih besar untuk mengalirkan air, dibandingkan pada lokasi RY – 02.
ANALISIS PENGGUNAAN LAHAN BAGIAN HULU SUNGAI CILIWUNG DALAM MENGURANGI VOLUME BANJIR JAKARTA DENGAN INTEGRASI CITRA SATELIT DEM SRTM Nurmalasari, Ageng
Geological Engineering E-Journal Vol 6, No 1 (2014): Volume 6, Nomor 1, Tahun 2014
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (615.168 KB)

Abstract

Flooding is a natural disasters phenomenon that often occurs in big cities inIndonesia, one of them is Jakarta. The Consequences of the floods in Jakarta are lowlandmorphology, high rainfall, large surface flow (run-off), river gradient or drainagegradient is very gentle, tidal influence and siltation of rivers around estuary. Jakarta is apart of the Ciliwung River downstream part, with a low situation of Jakarta makes therole of the Ciliwung upstream part become very important. It is connected with aconsequence of the flood runoff that can not be optimally absorbed by the soil, due tochanges in land use are not in accordance with their designation as a protected areas. The aims of this study to determine the condition of the Ciliwung upstream partsuch as changes of land use, condition of morphology and its effect on the volume offlooding in Jakarta. After knowing the changes and morphology that exist in the areathrough satellite imagery, it can be planned arrangement of space that affect thedischarge of water flows into upstream part. This study is geographically located in 10604940" - 10700015" East Longitudeand 603815" - 604605" South Latitute. Administratively, Ciliwung upstream part covers30 villages in Bogor Regency there are 2 villages (Sukaraja Subdistrict), 7 villages(Ciawi Subdistrict), 10 villages (Cisarua Subdistrict) , 11 villages (MegamendungSubdistrict) and 1 village in the East Bogor Subdistrict. Ciliwung upstream partwatershed area are 14 860 ha. The method of this study by approach analysis of landforms and land cover. Themain data used are Landsat - 7 ETM +, geological map scale of 1 : 100,000 and theearth map scale of 1 : 25,000. In addition, for an extra analysis of geological conditions,also used the image processing results that is Digital Elevation Model. The results usedfor the basis of land use planning that expected to be one solution to reduction of rainfallthat disembogue into the Bay of Jakarta. The analysis results of Landsat satellite imagery with multi-temporal from time totime there are visible changes in lines vegetation area become more bit and pushed by thedevelopment in various sectors. With the land use planning on the Ciliwung upstreampart, the government is expected to objectify, so the discharge of run-off flowing intoJakarta is reduced. 
KAJIAN GEOLOGI TATA LINGKUNGAN DAERAH RESAPAN AIR STUDI KASUS DAERAH KECAMATAN UNGARAN BARAT, KABUPATEN SEMARANG, PROVINSI JAWA TENGAH Sudarmo, Geni Dipo
Geological Engineering E-Journal Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013
Publisher : Geological Engineering E-Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1021.344 KB)

Abstract

Setiap manusia membutuhkan tempat tinggal untuk hidup dan terus berkembang. Perkembangan dan kebutuhan manusia ini akan menimbulkan multi player effect. Multi player effect merupakan konflik antara manusia dengan lingkungannya termasuk lahan yang ditempati dan kebutuhan airnya. Hal tersebut dapat mempengaruhi tataguna lahan lingkungan yang ditempati dan juga merubah fungsi lahan sebagai daerah resapan air.                     Daerah  resapan air merupakan kawasan lindung yang diatur dalam Keputusan Menteri Negara Lingkungan Hidup No.39/MENLH/8/1996. Menurut Perda Kabupaten Semarang No. 6 Tahun 2011 pada pasal 23 menyebutkan kawasan lindung meliputi kawasan hutan lindung, kawasan yang memberikan perlindungan terhadap kawasan bawahannya, kawasan perlindungan setempat, kawasan suaka alam, pelestarian alam dan cagar budaya, kawasan rawan bencana alam dan kawasan lindung geologi. Sementara Pasal 25 menyebutkan bahwa Kawasan yang memberi perlindungan terhadap kawasan bawahannya adalah kawasan resapan air dimana Kecamatan Ungaran Barat termasuk daerah resapan air. Dasar pemilihan kecamatan ini dikarenakan memiliki kepadatan penduduk yang tinggi daripada daerah resapan air lainnya.            Tujuan dari penelitian ini untuk mengetahui sebaran wilayah yang menjadi daerah resapan air, perubahan lahan daerah resapan air dan kelayakan wilayah penelitian sebagai daerah resapan air dengan menggunakan metode overlay dan pembobotan pada masing - masing parameter penelitian, sehingga dapat diketahui wilayah sebaran daerah resapan airnya.            Parameter yang dijadikan acuan dalam mengkaji daerah resapan ini adalah ketinggian lahan > 1500 mdpl, kemiringan lahan > 40%, penggunaan lahan sebagai hutan dan ruang terbuka hijau, curah hujan >2000mm/tahun, lahan peka atau sangat peka terhadap erosi. Dari hasil pembobotan dan skoring parameter ketinggian lahan, kelerengan dan penggunaan lahan, menghasilkan zona - zona parameter yang kemudian dilakukan overlay pada zona tersebut. Kemudian didapatkan wilayah yang menjadi daerah resapan air adalah Barat daya daerah penelitian, merupakan kaki Gunung Ungaran, tepatnya sebagian daerah Desa Nyatnyono, Desa Gogik dan Desa Lerep.

Page 4 of 17 | Total Record : 170

 2   3   4   5   6 

Filter by Year

2013 2014


Reset
Filter By Issues
All Issue Vol 6, No 1 (2014): Volume 6, Nomor 1, Tahun 2014 Vol 6, No 1 (2014): Volume 6, Nomor 1, Tahun 2014 Vol 6, No 2 (2014): Wisuda Periode Juli - Oktober 2014 Vol 6, No 2 (2014): Wisuda Periode Juli - Oktober 2014 Vol 5, No 2 (2013): Volume 5, Nomor 2, Tahun 2013 Vol 5, No 2 (2013): Volume 5, Nomor 2, Tahun 2013 Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013 Vol 5, No 1 (2013): Volume 5, Nomor 1, Tahun 2013 Volume 1, Nomor 1, Tahun 2013 Volume 1, Nomor 1, Tahun 2013