{"id":25340,"date":"2017-04-17T18:41:37","date_gmt":"2017-04-17T18:41:37","guid":{"rendered":"https:\/\/www.its.ac.id\/news\/2017\/04\/17\/mahasiswa-its-petakan-daerah-rawan-bencana\/"},"modified":"2017-04-17T18:41:37","modified_gmt":"2017-04-17T18:41:37","slug":"mahasiswa-its-petakan-daerah-rawan-bencana","status":"publish","type":"post","link":"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/","title":{"rendered":"Mahasiswa ITS Petakan Daerah Rawan Bencana"},"content":{"rendered":"<div>\n<div>Yusuf Syifaurrahman, Ketua Himpunan Mahasiswa Teknik Geofisika (HMTG) mengatakan riset itu menggunakan metode HVSR <em>(Horizontal to Vertical Spectral Ratio)<\/em> untuk membaca gelombang bawah tanah. Dalam metode ini, tim departemen riset dan teknologi HMTG dan Geophysical Student Survey Community Operation (GECO) Teknik Geofisika ITS mengidentifikasi ketebalan tanah lunak menggunakan alat <em>microtremor<\/em>.&nbsp;<\/div>\n<div><\/div>\n<div>&quot;<em>Microtremor <\/em>itu digunakan untuk metode pengukuran pasif, jadi hanya mengandalkan &nbsp;gelombang bawah tanah saja,&quot; ujar Farid Hendra, salah satu mahasiswa yang ikut turun ke lapangan. Alat ini juga bisa untuk mengidentifikasi kerentanan gempa, kecepatan pergeseran tanah, dan ketahanan tanah.&nbsp;<\/div>\n<div><\/div>\n<div>Dalam prosesnya, <em>microtremor <\/em>akan diletakkan pada dua puluh dua titik untuk diidentifikasi lapisannya. Namun posisi titik ukur bisa berbeda tergantung medan yang akan dicapai. Setiap pengukuran microtremor selanjutnya diatur untuk beroperasi tergantung kedalaman yang ingin dicapai. Semakin dalam lapisan yang ingin diketahui, semakin lama pula <em>microtremor <\/em>dijalankan.&nbsp;<\/div>\n<div><\/div>\n<div>Farid menjelaskan, setelah semua titik selesai diukur data-data tersebut akan dihubungkan secara interpolasi. Data yang keluar dalam bentuk gelombang seismogram nantinya akan diolah menjadi frekuensi natural sehingga dapat dipetakan kondisi ketebalan tanah lunak di daerah survei. Tanah akan dikatakan rawan terhadap longsor ketika suatu lapisan memiliki densitas yang tinggi dengan lapisan diatasnya.<\/div>\n<div><\/div>\n<div>Desa Gelengdowo merupakan daerah yang dikelilingi oleh perbukitan. Akibatnya daerah ini menjadi sangat rawan bencana tanah longsor. Tercatat di tahun 2016 terjadi dua kali tanah longsor di Desa Galengdowo pada bulan Februari dan November. Hingga saat ini, masih terdapat daerah yang belum mempunyai pemetaan daerah rawan bencana di Desa Galengdowo.<\/div>\n<div><\/div>\n<div>Dari kegiatan tersebut, Yusuf berharap penelitian mereka mampu memberikan banyak manfaat bagi masyarakat. &quot;Semoga kedepan semakin bijak megaplikasikan ilmu di masyarakat,&quot; pungkasnya. (mik\/ven)<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<div>Bencana longsor telah lama menjadi ancaman serius bagi masyarakat yang tinggal di daerah lereng gunung. Hal ini dirasakan sendiri oleh warga Desa Galengdowo, Jombang. Menjalankan salah satu tri darma perguruan tinggi, mahasiswa Departemen Teknik Geofisika Institut Teknologi Sepuluh Nopember (ITS) melakukan riset untuk memetakan lokasi rawan bencana di Desa Galengdowo, selama tiga hari hingga minggu (16\/4) sore.<\/div>\n","protected":false},"author":1,"featured_media":25341,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"categories":[14],"tags":[],"class_list":["post-25340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-berita-utama"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mahasiswa ITS Petakan Daerah Rawan Bencana - ITS News<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mahasiswa ITS Petakan Daerah Rawan Bencana - ITS News\" \/>\n<meta property=\"og:description\" content=\"Bencana longsor telah lama menjadi ancaman serius bagi masyarakat yang tinggal di daerah lereng gunung. Hal ini dirasakan sendiri oleh warga Desa Galengdowo, Jombang. Menjalankan salah satu tri darma perguruan tinggi, mahasiswa Departemen Teknik Geofisika Institut Teknologi Sepuluh Nopember (ITS) melakukan riset untuk memetakan lokasi rawan bencana di Desa Galengdowo, selama tiga hari hingga minggu (16\/4) sore.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\" \/>\n<meta property=\"og:site_name\" content=\"ITS News\" \/>\n<meta property=\"article:published_time\" content=\"2017-04-17T18:41:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.its.ac.id\/news\/wp-content\/uploads\/sites\/2\/2017\/11\/101719.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"540\" \/>\n\t<meta property=\"og:image:height\" content=\"405\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Dadang ITS\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dadang ITS\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\"},\"author\":{\"name\":\"Dadang ITS\",\"@id\":\"https:\/\/www.its.ac.id\/news\/#\/schema\/person\/6eeec5cd2e572452622df4ead17d20f2\"},\"headline\":\"Mahasiswa ITS Petakan Daerah Rawan Bencana\",\"datePublished\":\"2017-04-17T18:41:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\"},\"wordCount\":275,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.its.ac.id\/news\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.its.ac.id\/news\/wp-content\/uploads\/sites\/2\/2017\/11\/101719.jpeg\",\"articleSection\":[\"Berita Utama\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\",\"url\":\"https:\/\/www.its.ac.id\/news\/mahasiswa-its-petakan-daerah-rawan-bencana\/\",\"name\":\"Mahasiswa ITS Petakan Daerah Rawan Bencana - 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