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All Journal JURNAL AIR INDONESIA JURNAL TEKNOLOGI LINGKUNGAN Turbo : Jurnal Program Studi Teknik Mesin Edible : Jedb Jurnal Geosains Terapan Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Agus Kuswanto
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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APLIKASI METODA RES-2D UNTUK EKSPLORASI AIR BAWAH TANAH DI DAERAH KARS Kuswanto, Agus
Jurnal Air Indonesia Vol. 1 No. 2 (2005): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (589.698 KB) | DOI: 10.29122/jai.v1i2.2349

Abstract

People have long been interested in kars, the typically topograhy in limestone area. There are many spectacular ornament in the caves caused by carbonates presipitates. Among the most common shapes which is be chief attraction for cave visitors is stalactites, stalagmites and columns.  Beside of the excitements, kars also have hard problem for people who lived in that area. It is how to find out water for their living.   Karst formation, both the surface (dolina, hill, etc) and underground forms (caverns, groundwater conduits, underground streams), appears as conductive zones relative to adjacent undisturbed limestone.  Therefore resistivity methode will produce good results if  applied to identify dolina, conduits , caverns and structure of geology in kars. The methode  describes in this paper is Res-2D with configuration of pole-dipole with area for research are kars in Pacitan and Tulungagung region. Four principal layers can typically be differentiated in a vertical section : near surface (clayey) loam and soil in dolina, dry karstified limestone, conduit & cave and solid unkarstified limestone. They have contrast of resistivity. Conduits have resistivity value range from 10 to 20 ohmm, whereas resistivty of cave is > 1000 ohmm. Karstified limestone have resistivity value from 20 to 250 ohmm, whereas massive limestone have resistivity > 250 ohmm.  This paper shows that Res-2D methode can give good contribution in exploration of groundwater in kars area.    Kata Kunci : Kars, Res-2D, Conduits
PENERAPAN METODA RESISTIVITY DAN PERSAMAAN ARCHIE UNTUK KAJIAN POTENSI AKUIFER DI PULAU NATUNA Kuswanto, Agus; Sudinda, Teddy W
Jurnal Teknologi Lingkungan Vol. 2 No. 3 (2001): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (284.177 KB) | DOI: 10.29122/jtl.v2i3.219

Abstract

Natuna Island will be developed as main center of LNG mining and refineryactivities which will be located in South Cina Sea. As consequences, manyindustries will grow fast in this island, and water consumption will increasedrastically. Therefore, it is important to identify aquifer potentiality. There is manymetode of identificaton. This paper show the application of resistivity combine with Archie’s equation to identify vertical depth and horizontal profile of aquifer. From resistivity we got value of every rock formation whereas use Archie’s equation we interpreted resistivity value of good aquifer.
APLIKASI METODA RES-2D UNTUK EKSPLORASI AIR BAWAH TANAH DI DAERAH KARS Kuswanto, Agus
Jurnal Air Indonesia Vol. 1 No. 2 (2005): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v1i2.2349

Abstract

People have long been interested in kars, the typically topograhy in limestone area. There are many spectacular ornament in the caves caused by carbonates presipitates. Among the most common shapes which is be chief attraction for cave visitors is stalactites, stalagmites and columns.  Beside of the excitements, kars also have hard problem for people who lived in that area. It is how to find out water for their living.   Karst formation, both the surface (dolina, hill, etc) and underground forms (caverns, groundwater conduits, underground streams), appears as conductive zones relative to adjacent undisturbed limestone.  Therefore resistivity methode will produce good results if  applied to identify dolina, conduits , caverns and structure of geology in kars. The methode  describes in this paper is Res-2D with configuration of pole-dipole with area for research are kars in Pacitan and Tulungagung region. Four principal layers can typically be differentiated in a vertical section : near surface (clayey) loam and soil in dolina, dry karstified limestone, conduit & cave and solid unkarstified limestone. They have contrast of resistivity. Conduits have resistivity value range from 10 to 20 ohmm, whereas resistivty of cave is > 1000 ohmm. Karstified limestone have resistivity value from 20 to 250 ohmm, whereas massive limestone have resistivity > 250 ohmm.  This paper shows that Res-2D methode can give good contribution in exploration of groundwater in kars area.    Kata Kunci : Kars, Res-2D, Conduits
PENERAPAN METODA RESISTIVITY DAN PERSAMAAN ARCHIE UNTUK KAJIAN POTENSI AKUIFER DI PULAU NATUNA Agus Kuswanto; Teddy W Sudinda
Jurnal Teknologi Lingkungan Vol. 2 No. 3 (2001): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (284.177 KB) | DOI: 10.29122/jtl.v2i3.219

Abstract

Natuna Island will be developed as main center of LNG mining and refineryactivities which will be located in South Cina Sea. As consequences, manyindustries will grow fast in this island, and water consumption will increasedrastically. Therefore, it is important to identify aquifer potentiality. There is manymetode of identificaton. This paper show the application of resistivity combine with Archie’s equation to identify vertical depth and horizontal profile of aquifer. From resistivity we got value of every rock formation whereas use Archie’s equation we interpreted resistivity value of good aquifer.
Karakteristik mutu kimia dan uji indrawi pempek ikan tenggiri pasir dengan penambahan albumin Suyatno, Suyatno; Dasir, Dasir; Kuswanto, Agus
Edible: Jurnal Penelitian Ilmu-ilmu Teknologi Pangan Vol 12, No 2 (2023): Edible: Jurnal Penelitian Ilmu dan Teknologi Pangan
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jedb.v12i2.7345

Abstract

Penelitian ini bertujuan untuk mengetahui kandungan protein dan daya terima konsumen terhadap pempek ikan tenggiri pasir dengan penambahan albumin penelitian ini dilaksanakan di laboratorium Fakultas Pertanian Universitas Muhammadiyah Palembang dan laboratorium di PT bina sawit makmur sampurna agro terhitung sejak bulan November 2022 hingga bulan Januari 2023 metode yang digunakan adalah metode rancangan rancak kelompok rak yang disusun secara non faktorial hasil penelitian menunjukkan bahwa penambahan albumin berpengaruh sangat nyata terhadap kadar protein pempek ikan tenggiri pasir pada protein tertinggi pada perlakuan p0 yaitu pempek ikan gabus dan kontrol dengan nilai rata-rata 18,82% kadar protein tertinggi pada pempek ikan tenggiri pasir dengan penambahan albumin terdapat pada A5 yaitu penambahan albumin 25% dengan nilai rata-rata 16,23% kadar protein pempek ikan tenggiri pasir terendah terdapat pada perlakuan A1 yaitu penanaman album 5% dengan rata-rata 8,48%
Pengaruh Debit Air Dan Sudut Busur Masuk Nosel Terhadap Kinerja Turbin Cross-flow Mafruddin, Mafruddin; Handono, Sulis Dri; Surono, Bambang; Ivoda, Havinza Namza; Cahyono, Adi; Fajri, Muhammad; Rafli, Endhita Fourten; Kuswanto, Agus
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.3291

Abstract

Turbin Cross-flow merupakan komponen utama pada PLTA dan berfungsi mengkonversi energi air menjadi energi mekanik. Kinerja turbin dinilai berdasarkan daya dan efisiensi yang dihasilkan turbin. Ada beberapa faktor yang dapat mempengaruhi kinerja turbin Cross-flow diantaranya yaitu debit air dan sudut busur masuk (profil) nosel. Tujuan penelitian ini adalah untuk mengetahui pengaruh debit air dan sudut busur masuk nosel terhadap kinerja turbin Cross-Flow. Metode yang digunakan yaitu penelitian eksperimental dengan melakukan perencanaan dan pembuatan serta pengujian turbin Cross-flow menggunakan variasi debit air (60, 80, 100 dan 120 LPM) dan sudut busur masuk nosel (profil A, profil B dan profil C). Spesifikasi turbin Cross-flow yang dibuat dan diuji yaitu diameter luar runner 0.145 m, diameter dalam runner 0.80 m, jumlah sudu 18, tebal nosel 0.03 m dan jari-jari sudu runner  0.047 m serta head efektif yang digunakan saat pengujian 0.8 m. Dari hasil penelitian dapat disimpulkan bahwa variasi debit air dan sudut busur masuk nosel berpengaruh terhadap kinerja turbin Cross-flow. Semakin besar debit air yang digunakan kinerja turbin semakin meningkat. Putaran turbin dan daya serta efisiensi turbin Cross-flow tertinggi diperoleh dengan debit air 120 LPM dan sudut busur masuk nosel Profil A.
Identifikasi Endapan Bijih Besi Kabupaten Kotawaringin Timur, Provinsi Kalimantan Tengah Menggunakan Korelasi serta Komparasi Metode IP-Resistivitas dan Magnetik Indreswari, Salsabila Sisqi; Supriyanto; Kuswanto, Agus
Jurnal Geosains Terapan Vol 4 No 1 (2021): Jurnal Geosains Terapan
Publisher : Lembaga Ilmu Pengetahuan Indonesia

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Abstract

Penelitian dilakukan pada Kabupaten Kotawaringin Timur, Provinsi Kalimantan Tengah menggunakan korelasi serta komparasi metode polarisasi terimbas (IP), resistivitas listrik, dan magnetik untuk memetakan keberadaan zona mineralisasi endapan bijih besi yang bersifat ekonomis. Luas daerah yang menjadi objek penelitian sekitar 0,3 km2. Konfigurasi elektroda yang digunakan pada metode geolistrik adalah konfigurasi Wenner dan terdapat lima lintasan pengukuran geolistrik berarah barat laut-tenggara dengan panjang setiap lintasan 470 m. Data resistivitas listrik dapat menunjukkan jenis litologi, zona alterasi, dan zona mineral logam. Data IP dapat menunjukkan adanya zona mineralisasi serta memetakan kondisi bawah permukaan mineralisasi endapan bijih besi secara lateral dan vertikal. Kemudian data magnetik yang diberikan mencakup area pengukuran geolistrik, sehingga dapat dilakukan profiling anomali magnetik pada setiap lintasan geolistrik. Data magnetik mampu memetakan zona batuan teralterasi dan zona struktur. Daerah penelitian berada pada batuan gunung api yang terdiri atas breksi berkomposisi andesit dan basal, aliran lava, batupasir tufan, tuf, serta intrusi andesit dan basal. Berdasarkan informasi geologi regional dan litologi daerah penelitian, genesa bijih besi pada daerah penelitian terbentuk dari proses hidrotermal dan tergolong bijih besi primer (bijih besi oksida–magnetit dan hematit).
Pemodelan Metode Resistivitas 4D untuk Identifikasi Penyebab Longsor di Wilayah Asrama Kampus Lapangan Geologi Karangsambung Fahira, Azelia Maudine Khadijah; Iskandarsyah; Kuswanto, Agus; Abdulah, Junaedi
Jurnal Geosains Terapan Vol 6 No 2 (2023): Jurnal Geosains Terapan
Publisher : Lembaga Ilmu Pengetahuan Indonesia

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Abstract

Tanah longsor di Asrama Kampus Lapangan Geologi Karangsambung mulai Agustus - November 2022 menyebabkan tembok bergeser hingga membelok. Pada Agustus 2023, pergeseran tembok sekitar 1,5 meter kembali terjadi pada zona yang mengalami longsor sebelumnya. Litologi di bawah permukaan didominasi batulempung yang tidak dapat mengalirkan air tanah. Pengamatan sumur pompa menunjukkan naiknya muka air tanah setelah penyedotan, menandakan kandungan air tinggi di bawah permukaan, yang dapat disebabkan oleh curah hujan ringan yang berkepanjangan. Pergerakan air tanah perlu dimodelkan untuk mengidentifikasi arah aliran air dari resapan hujan ke bawah permukaan. Pemodelan metode resistivitas 4D sebanyak 4 kali dan jarak waktu 3 jam menunjukkan air hujan meresap pada lapisan tanah timbunan, menyebar ke arah timur, selatan, dan barat laut. Air dari selatan dan timur mengalir ke tenggara kedalaman 4 – 20 meter, sementara dari barat laut menuju kedalaman 8 – 23 meter. Air terperangkap di atas bidang gelincir lempung lanauan, terutama di tenggara yang mendekati zona longsor. Curah hujan ringan berkepanjangan terjadi 14 kali dari Januari - November 2022, dengan puncaknya pada 13 - 17 Juli 2022 sebesar 22,65 mm/hari. Dengan demikian, penyebab tanah longsor di daerah penelitian adalah air resapan hujan ringan berkepanjangan yang mengalir ke bawah zona longsor dan terperangkap pada bidang gelincir lempung lanauan.
Application of Electrical Resistivity Method with Peak and Flat Base Electrodes to Detect A Potential Water Leakage Underneath A Water Pool in Kiara Payung, Sumedang, West Java Azizah, Mutiara Nurul; Valencia, Ayunda Aulia; Kuswanto, Agus
Jurnal Geosains Terapan Vol 6 No 2 (2023): Jurnal Geosains Terapan
Publisher : Lembaga Ilmu Pengetahuan Indonesia

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Abstract

This study aims to detect potential leakage underneath a water pool made of concrete using the electrical resistivity method with peak and flat base electrodes. Peak electrodes cannot be used on hard materials such as concrete because they can damage the concrete structure, while flat base electrodes can be used without causing any damage to the structure. This study was performed using a single profile, along which electrical resistivity measurements were conducted with different electrode combinations: all peak electrodes, a combination of peak and flat base electrodes, and all flat base electrodes. The maximum profile length was 117.5 meters with a spacing between electrodes of 2.5 meters and using a total of 48 electrodes. The measured apparent resistivity was inverted using the least-square and robust constraint inversion methods to obtain 2D true resistivity sections. An analysis of the 2D sections was conducted based on the resistivity profile, model errors, and ability to resolve the water pool geometry. The results show that the inverted model using the robust constraint method with flat base electrodes has the best result, which exhibits a clear boundary between the water pool and its surrounding soil, has a smaller error, and is able to resolve the water pool geometry compared to other models. This inversion result indicates no leakage occurs underneath the water pool. Therefore, the electrical resistivity method using flat base electrodes can be used for long-term maintaining the water pool in the study area and should be used in other geoelectric resistivity studies on hard surfaces.
Identification of Basalt Rock Distribution Using Resistivity Geoelectric Method in The National Capital City (IKN), Paser, East Kalimantan Sopan, Langnanda Ekakurnia Putri; Agustin, Erisa; Kuncoro, Kirana Helga Aimee; Sarkowi, Muh; Kuswanto, Agus; Kumalasari, Isti Nur; Mulyasari, Rahmi
EKSPLORIUM Vol. 45 No. 2 (2024): NOVEMBER 2024
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.7081

Abstract

The construction of the National Capital City (IKN) is currently being carried out in East Kalimantan, resulting in increased demand for construction materials. Basalt is among the rocks that can be used as construction material in IKN. This rock has a high economic value due to its high demand but limited quantity. Basalt exploration around IKN is carried out to acquire rock resources and reduce construction costs due to its proximity to the site. This study aims to determine the distribution of basalt in the Kuaro area, East Kalimantan. The geology of the research area is composed of the Ultramafic Complex Formation, which comprises gabbro, basalt, serpentinite, and harzburgite. This research uses the Wenner-Alpha configuration geoelectric method to identify the distribution of basalt in the subsurface. Geoelectric measurements were carried out on six measurement lines, each line length of 470 m and electrode spacing of 10 m. The results of geoelectric data analysis show that the basalt has a specific resistivity value ranging from 200–4022 Ωm. Basalts were identified at depths of 10–75 m with 145 m, 325 m, 165 m and 183 m thicknesses in lines 1, 2, 5 and 6, respectively. The presence of basalt in lines 3 and 4 is at a depth of 10–75 m with an average thickness of 153 m and 125 m, respectively. Economically, basalt rocks in this area are classified as medium to highly recommendable for exploitation.
Co-Authors Abdulah, Junaedi Adi Cahyono Agustin, Erisa Azizah, Mutiara Nurul Dasir, Dasir Fahira, Azelia Maudine Khadijah Handono, Sulis Dri Indreswari, Salsabila Sisqi Iskandarsyah Ivoda, Havinza Namza Kumalasari, Isti Nur Kuncoro, Kirana Helga Aimee Mafruddin Mafruddin, Mafruddin Muh Sarkowi Muhammad Fajri Mulyasari, Rahmi Rafli, Endhita Fourten Sopan, Langnanda Ekakurnia Putri Supriyanto Surono, Bambang Suyatno Suyatno Teddy W Sudinda Valencia, Ayunda Aulia