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STUDI ALIRAN FLUIDA MANIFESTASI PANAS BUMI DESA DIWAK DAN DESA DEREKAN, KECAMATAN BERGAS, KABUPATEN SEMARANG MENGGUNAKAN METODE TAHANAN JENIS 3D. Hotlan Simbolon; Udi Harmoko; Gatot Yulianto; Sugeng Widada; Yusuf D. H.; Sahid Sahid
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This research use geolistric method that aims to analize the system of manifestation of fluida distribution geothermal on Diwak, Derekan Central Java, based on measurement of geolistric 3-D with pole - pole configuration, has been done. Data processing is performed using software Res3dinv and surfer which results in a horizontal and vertical cross-section. The results of the interpretation of 2D processed by software rockwork to obtain 3-D cross-section. The results showed that the measurement point 1, the direction of the fluid flow toward the east. Measurement point 2, the direction of flow of the fluid toward the northwest, the fluid flow direction to both of the points towards Lutung river. Keywords : Fluida, pole-pole konfiguration, Diwak, Derakan
IDENTIFIKASI STRUKTUR BAWAH PERMUKAAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI AREA PANASBUMI DESA DIWAK DAN DEREKAN KECAMATAN BERGAS KABUPATEN SEMARANG Sigit Darmawan; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Diwak and Derekan is one of geothermal manifest which exist in geothermal system of Ungaran. Geoelectric method schlumberger configuration is one of the geophysical methods that used in the exploration of natural resources below the surface. The purpose of researching is to know layer of subsurface structure which control Diwak and Derekan geothermal manifest.Field measurement data in the field are potential differences and currents which can be used to calculate apparent resistivity value. After apparent resistivity value is created then processed using IPI2WIN program to know resistivity value in each layer with geology information validation.The results of the study showed six geoelectric layer of rock that is composed of layers of mudstone, siltstone, tuff, sandstone brecia and pasirtuf with resistivity values and different thicknesses. Interpretation of manually indicate the presence of two down faults that are weak zone where the fluid surface discharge Keyword: Geoelectric, Schlumberger, Geothermal, Fault, Diwak and Derekan
INTERPRETASI POLA ALIRAN FLUIDA PANAS BUMI DENGAN METODE SPONTANEOUS-POTENTIAL (SP) DAN SUHU PERMUKAAN DANGKAL DI LERENG UTARA GUNUNG TELOMOYO KABUPATEN SEMARANG Maila Shofa; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The model heat flow at  Telomoyo Mountain Semarang District  has measured and identified  using spontaneous potensial and  shallow temperature surface methods.Field data has proceed using Microsoft Excel which the result entered to Surfer11 with the result map contour of SP and temperature distribution. The result showed that range anomaly SP about -40mV-70mV and distribution of temperature which has temperature range 23,5º-31ºC. The direction of heat flow direct from South to North-East.Key Words : Spontaneous-potential, shallow temperature surface, Sufer11, Model Heat Flow, Telomoyo Mountain
ANALISIS STRUKTUR BAWAH PERMUKAAN DAERAH HARJOSARI KABUPATEN SEMARANG MENGGUNAKAN METODE GEOMAGNET DENGAN PEMODELAN 2D DAN 3D Mars Widodo; Tony Yulianto; Udi Harmoko; Gatot Yulianto; Sugeng Widada; Yusuf Dewantoro
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Research of analysis subsurface structure in Harjosari Semarang district using geomagnet methods with 2D and 3D modelling. In this study, magnetic data acquisition was carried out in 93 points by using a PPM (Proton Precession Magnetometer) geometrics type of GSM 19T and 2 units geotron magnetometer G5 models to get the values of the total magnetic field. The result of measurement data is processed by the daily variation correction and IGRF correction (International Geomagnetic Reference Field). The corrected data has been used to create total magnetic anomaly contour. The total magnetic anomaly contour has been used to process reduction to plan surface. The result of reduction to plan surface has been used to create a contour upward continuation and then made reduction to the poles. The result of research showed the total magnetic anomaly closure pair of positive and negative indicated a fault zone below the surface. Result of research an incision on the closure pair of positive and negative to determine the subsurface structure of the region by creating a model of 2-dimensional (2D) using software Mag2DC. In 2D modeling result shows that was a fault zone below the surface about 210 to 1000 meters depth. The existence of the fault structure below the surface was estimated as a result of rock shifting from the northeastern area of research. Result of a 3-dimensional (3D) modelling using UBCMag3D software to determine subsurface structures more clearly by including error values, parameter values susceptibility and density models. On the results of the 3D display of subsurface structures found any difference in stark contrast to the susceptibility value at a depth of 225 meters to 1200 meters. The susceptibility value differences suspected presence of fault structures below the surface.
PEMODELAN INVERSI ANOMALI MAGNETIK 3D DAERAH MATA AIR PANAS DIWAK DAN DEREKAN Siti Zulaikhah; Udi Harmoko; Tony Yulianto; Gatot Yulianto; Sugeng Widada; Yusuf Dewantoro
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Research of magnetic methods that aim to interpretation the subsurface structure around the hot springs area Diwak and Derekan and to identification caused of hot springs Diwak and Derekan has been successfully carried out. In this research, measurements were taken at 97 points using a proton precession magnetometer (PPM) type of GSM model 19T geometrics and two Geotron Magnetometer G5 models to get the value of the total magnetic field. Measurement data is processed by the daily variation correction and correction IGRF (International Geomagnetic Reference Field) to get the value of the total magnetic field anomaly. Corrected data used to create contours of the total magnetic field anomaly. Contour total magnetic field anomaly is used for the reduction to plan surface process and upward continuation process. The results of the upward continuation get the contours of local anomaly and regional anomaly, the results of the local anomaly contour then reduced to the pole. Results of the research is a pair of positive and negative closure indicate a fault structure below the surface. There are two pairs of positive and negative closure which an incision is made to determine the subsurface structure by creating a 2D model using the software Mag2dc. 2D modeling results indicate the existence of a second incision fault structure in the form of down trending fault southwest-northeast. Meanwhile, to make 3D models using software Mag3D and 3D modeling results indicate the presence of fault structures below the surface. Fault zone results of 2D and 3D modeling is a media outlet fluid to the surface in the form of hot springs Diwak and Derekan.
INTERPRETASI BAWAH PERMUKAAN SISTEM PANAS BUMI DIWAK DAN DEREKAN BERDASARKAN DATA GRAVITASI Syamsul Ilmi; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

ABSTRACTResearch has been carried out using a gravity method that aims to interpret the subsurface structure of the Diwak - Derekan hot springs area based on the Bouguer anomaly data. It also aims to investigate the geothermal system in the area.  The data aquisition was taken using gravitymeter Lacoste & Romberg.Data processing had been done with high correction tool, tidal correction, drift correction,  gravity absolute correction, gravity theoretical correction, free air correction, Bouguer correction, terrain correction to get the complete Bouguer anomaly.  Bouguer anomolay is projected to flat plane and upward continuation is used to separate the regional and residual anomaly. For 2D modelling interpretation by Grav2DC software.The results of study showed the complete Bouguer anomaly contour pair of positive and negative contour indicate a fault zone below the surface. Interpretation is strengthened by the results of the modeling showed a  fault of Diwak - Derekan areas trending southwest- northeast. This fault zone is used as a media outlet fluid to the surface of geothermal systems.Keywords: Gravity Method, 2D modelling, Diwak, Derekan
PEMODELAN STEADY STATE SISTEM PANAS BUMI DAERAH SUMBER AIR PANAS DIWAK-DERAKAN DENGAN MENGGUNAKAN SOFTWARE HYDROTHREM 2.2 Aditya Firdaus; Udi Harmoko; Sugeng Widada
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Steady State Modeling has been done hot springs Diwak-Derekan using Hydrotherm 2.2 software which aims to model numerically geothermal system Diwak-Derekan in Steady State conditions. The results form the output of Hydrothrem 2.2 Temperature Distribution and visualization of the data carried Temperature Distribution.Extent of the study area is 16 km x 16 km, where there is a buffer area in the outer portion of the study area. then made construction research area consisting of several slice and block research. Used topographic data using secondary data, and topographic data modeling made in accordance with the slice. Each slice of the construction area made initial research model that contains the physical parameters. Due to the limitations of the data parameters of physics, then some physical parameters of the data analogous to data from Mount Merapi and soil mechanics research data Diponegoro University Dam, physical parameters and the data is made in the form of program listings in the form of input for software Hydrothrem which Hydrotherm Software run the program until the year to 200,000 by year interval 10,000 years.The results of data visualization is seen that the temperature distribution for the data in the year to 80,000 and so no change is significant, this indicates that in the year to 80,000 already reached Steady State conditions. Khono (2000) said, geothermal system reach steady state condition between 200.000-500.000 years, its because using analogical data from Merapi Vulcano and ground mechanic Diponegoro University dam. Manifestations of geothermal systems around the emergence of hot water Diwak-Derekan a geothermal system associated with sediments. This is confirmed by studies based on the gravity method which is done around the study area, where there are faults trending down southwest - northeast parallel to Kali and Kali Jumbleng Klampok, where after a qualitative interpretation there are 4 layers of rock, where the top layer is sediment layer has a depth of about 3 km.Keywords: geothermal, fault, Distributions Temperature, geothermal systems, Steady State.
SIMULASI MODEL FISIK EFEKTIVITAS PEMECAH GELOMBANG TETRAPOD DAN DOLOS Maratus Khasanah Humairah; Sugeng Widada; Rikha Widiaratih
JURNAL TEKNIK HIDRAULIK Vol 13, No 1 (2022): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v13i1.660

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In order to create  calm ocean water, breakwater is essential for reducing wave energy. Rubble-mound breakwater with tetrapod and dolosse armor can be a solution in reducing ocean wave energy. This research aims to understand the effectiveness of rubble-mound tetrapod and dolosse breakwater in reducing wave energy with sea level condition variation in a laboratory. The method of this research is an experimental method that uses a breakwater physical model with various scenarios. Testing scenarios are determined based on water depth, wave period (T), and armour structure. The results of this research showed that rubble-mound tetrapod breakwater is the most effective breakwater with an average reducing percentage of 86.7%. Rubble- mound tetrapod and dolosse breakwater physical model have high effectiveness because they are built by rubble mound structure that forms a sloping side. These structures are effective in reducing wave energy because the waves get in between rock slits. So, the wave energy reduces when it passes through the breakwater. This research can give some information and analysis in planning a breakwater effectively and efficiently in the ocean.Keywords: breakwater physical model, tetrapod, dolosse, wave energy 
Pemantauan Kerentanan Fisik di Pesisir Kabupaten Demak (Studi Kasus Perubahan Garis Pantai) Theresa Pinkan Gustya Primasti; Hariyadi Hariyadi; Baskoro Rochaddi; Sugeng Widada; rikha widiaratih
Indonesian Journal of Oceanography Vol 3, No 1 (2021): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (477.749 KB) | DOI: 10.14710/ijoce.v3i1.9997

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Wilayah pesisir Kabupaten Demak yang berada di bagian pantai utara Jawa merupakan wilayah yang rentan terhadap bencana. Kabupaten Demak yang awalnya memiliki sektor pertanian yang maju kini berubah menjadi kawasan industri, pemukiman dan pembangunan. Oleh karena itu, diperlukan suatu kajian untuk menentukan tingkat kerentanan fisik wilayah pesisir di Kabupaten Demak yang meliputi parameter geomorfologi, elevasi, perubahan garis pantai, pasang surut, kenaikan muka air laut dan gelombang. Tujuan penelitian ini adalah untuk menentukan indeks kerentanan pesisir Kabupaten Demak yang difokuskan pada analisa dan evaluasi perubahan garis pantai. Metode yang digunakan dalam penelitian ini adalah metode Coastal Vulnerability Index (CVI) yang diadaptasi oleh United States Geological Suveys (USGS) yang dibagi menjadi lima kategori kerentanan pesisir. Wiayah Pesisir Kabupaten Demak terbagi menjadi 2 kategori kerentanan yaitu Rentan yang berada di Kecamatan Bonang, Kecamatan Karang Tengah dan Kecamatan Sayung. Sedangkan untuk kategori Sedang berada di Kecamatan Wedung. Hasil perhitungan variable fisik yakni geomorfologi, elevasi, perubahan garis pantai, pasang surut, kenaikan muka air laut dan gelombang menunjukkan bahwa parameter yang berpengaruh besar terhadap kerentanan wilayah pesisir Kabupaten Demak adalah perubahan garis pantai. Kecenderungan perubahan garis pantai di pesisir Kabupaten Demak yaitu erosi pantai dibandingkan akresi. Setiap desa di sepanjang Pesisir Kabupaten Demak mengalami tren kenaikan perubahan garis pantai baik abrasi maupun akresi.
Distribusi Material Padatan Tersuspensi di Perairan Sungai Jajar, Kabupaten Demak Faiz Hamzah Adriono; Muhammad Zainuri; Muhammad Helmi; Baskoro Rochaddi; Sugeng Widada
Indonesian Journal of Oceanography Vol 3, No 4 (2021): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (932.914 KB) | DOI: 10.14710/ijoce.v3i4.11862

Abstract

Perairan sekitar muara Sungai Jajar merupakan jalur keluar masuknya perahu nelayan yang bersandar di hilir sungai dan sekaligus tempat berlindung perahu dari gelombang. Daerah Aliran Sungai (DAS) Jajar yang berupa area pemukiman dan persawahan menjadikan kandungan material padatan tersuspensi di muara cukup tinggi. Faktor hidro oseanografi seperti arus dan pasang surut merupakan faktor penting dalam persebaran material padatan tersuspensi . Tujuan dilakukannya penelitian ini adalah untuk mengetahui pengaruh arus dan pasang surut terhadap sebaran material padatan tersuspensi di muara Sungai Jajar. Metode yang digunakan adalah kuantitatif dengan metode pemodelan hidrodinamika 2D menggunakan software MIKE 21. Penentuan titik sampling dilakukan menggunakan metode purposive, sedangkan pengolahan data arus dilakukan data pasang surut menggunakan metode Admiralty. Analisis material sedimen tersuspensi menggunakan metode Gravimetri. Hasil pengolahan data menunjukkan arus bergerak dari arah barat laut ke tenggara saat pasang menuju surut dengan kecepatan tertinggi 0,1972m/det dan dari arah tenggara ke barat laur saat surut menuju pasang dengan kecepatan tertinggi 0,128 m/det. Arus saat pasang menuju surut membawa sedimen tersuspensi dari muara sungai kearah laut dan saat arus surut menuju pasang sedimen tersuspensi yang berada di laut terbawa arus menuju muara sungai. Nilai sedimen tersuspensi pada kedalaman 0,2D berkisar antara 0 0,3818–0,4435 g/l,  t berkisar antara 0,3913 – 0,4477 g/l pada kedalaman 0.6D dan berkisar antara 0,3983–0,4690 g/l pada  kedalaman 0,8D. Saat kondisi pasang menuju surut maupun surut menuju pasang konsentrasi sedimen tersuspensi di sekitar muara sungai lebih tinggi disbanding lokasi laiinya. Berdasarkan hasil penelitian dapat disimpulkan bahwa persebaran material padatan tersuspensi di lokasi dipengaruhi arah arus dan pasang surut. 
Co-Authors . Sahid ., Safinatunnaziyah Aang Hidayat Abd Basith Mukhlas Achmad Widodo Adha, Ikhwannur Adi Chandra Kusuma Aditya Firdaus Agung Windadi, Agung Agus Setyawan Ahdannabiel, Hamammi Aiman, Muhammad Naufal Alchacindy Guenergar Alfathony Krisnabudhi Alfi Satriadi Ali Ali Aliyatarrafiah Aliyatarrafiah Andnur, Mohammad Octa Anindya Wirasatriya Annisa, Shifa Dini Ansony, Muhammad A.N. Anwar, Muhammad Rehan Ardine, Joseph Emmanuel Arifa, Adzkia Noerma Arifiyana Arifiyana, Arifiyana Aris Ismanto Aryo Witono Azhar Afi Azis Rifai Bagaskara, Dicky Prasetya Baskoro Rochaddi Baskoro Rochaddi Chrisna Adhi Suryono Daffa Dinan Ihsani El-Fath Damanik, Doding Akka Dani Mardiati, S.T., M.Eng. David Milliano Josanova Denny Nugroho S Denny Nugroho Sugianto Devi Verawati Gusman Devi Yuni Sari Sihombing Dimas Wahyu Anggara Diny Agustina Rahayu Diyan Muhamad Ramdani Djunaedi Muljawan Dwi Haryo Ismunarti Dwi Haryo Ismunarti Dwi Oktiarini Dwianti, Rizki Fitria Dwigita Aryani Sedyoko Ediar Usman Edy Trihatmoko Elis Indrayanti Endang Sri Susilo Erfiko, Muhammad Fery Erna Dwi Pertiwi Esha Etlin Saratoga Faiz Hamzah Adriono Faizal Ahmad Fajar Hudoyo Farisan, Ardhan Franto Novico Gatot Yulianto Gentur Handoyo Ghifari Raihan Silam Siregar Hadi Endrawati Hari Prayogi, Hari Hariadi Hariadi Hariyadi Hariyadi Harmon Prayogi HARYANTO Hendry Siagian Heryoso Setiyono Hotlan Simbolon Ibrahim, Muh. Lintang Galih Ice Trisnawati Togatorop Ika Bagus Priambodo Ilham Aulia Nur Fuady, Ilham Aulia Indra Budi Prasetyawan Indrawan, Rizky Pri Irham Nurwidyanto Irwani Irwani Irwani Irwani Irwani Irwani Isnani, Desi Kumala Iut Triutami Jannisa Raska Jarot Marwoto Jarot Marwoto Johanna R N D Purba Juhadi Juhadi Junaidi Junaidi Karunia Lasmarito Pintubatu Khoirun Nisa Larosa Nurfikri Gamellia Latifah Mitrayani Hanum Lilik Maslukah M. Fachrurrozi M. Hanif Rasyda Maila Shofa Maramis, Michelle Maratus Khasanah Humairah Mars Widodo Meida Yustiana Mohamad Ihsan Wijaya Mohamad Iqbal Primananda Muchammad Iqbal Havis Muh Yusuf Muh. Yusuf Muhamad Adnan Kurnianto Muhamad Herdadi Ramadhan, Muhamad Herdadi Muhammad Chusnul Marom Muhammad Helmi Muhammad Helmi Muhammad Taqy Muhammad Zainuri Muhazzir Muhazzir Mumtaz, Fathiyah Muslim Muslim Muslim Muslim Muttahari S., S.T., M.Sc., Moch. Prahastomi Nanda Rahmadi Novi Susetyo Adi Nugroho Agus D Nurits Zahrul Aini Fitriyah, Nurits Zahrul Oksto Ridho Sianturi Paret Agung Sanjaka Perwira, Akmal Yazid Petrus Subardjo Po Abas Sunarya Prahastomi, Mochammad Pratibhase Arhat Pratiwi Ramadhan Pratomo, Fajar Kurnia Pratomo, Septyo Uji Priatin Hadi Wijaya Purba, Rezon Fryando Purwanto Purwanto Putra, Roy Andika Putu Suryaniti Dewi Radhwarana, Amani Rahutri Radich Arief Nugroho Rahmadeni, Hadin August Rahmalia, Fahri Restie AIK Ridho Hans Gurning Rifda Ayu Sartika Rikha Widiaratih Rina Oktaviani Dzikrurianti Riza Rahardiawan Rizky Amalia Rizky, Aga Rr. Tony Yulianto Rudhi Pribadi Ruli Supriati, Ruli Sabila, Anis Yasmin Sadewo, M. Firouz Dimas Safwan, Mohammad Arif Sahid Sahid Sebastian Margino Senopati Satya Suprapto, Senopati Satya Siddhi Saputro Sidhi Saputra Sigit Darmawan Siti Hamidah Siti Maesaroh Siti Munawaroh siti Nurindah Sari Siti Zulaikhah Sondy Sunaryo Sri Yulina Wulandari Srijati, Satrio Stephanie Stephanie Subagiyo Subagiyo Sugeng Santoso Surya Nugraha Syaiful Suryono Suryono Syafrei Adi Iskandar Syakinah Maghfirah Ayu Syamsul Ilmi TATI NURHAYATI Tezar Rafandi Theresa Pinkan Gustya Primasti Tjaturahono Budi Sanjoto Tony, Brian Tri Abdul Hidayat Tribhaskoro, Whisnu Triyanto Triyanto Triyono . Udi Harmoko Ulung Jantama Wisha Valensia Enzeline Enzeline, Valensia Enzeline Vemilarisa Kusumadewi Warsito Atmodjo Widiaratih, Rikha Wiguna, Husein Sadewa Wilis Ari Setyati Wita Melisa Yoel Prayogo Yoga Yuniadi Yulian Fahmi Sageta Yulianto Dwi Laksono, Yulianto Dwi Yusuf D. H. Yusuf Dewantoro Herlambang