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ANALISIS POTENSI ANCAMAN GEMPA TERHADAP BANGUNAN wisyanto wisyanto
Jurnal Sains dan Teknologi Mitigasi Bencana Vol. 12 No. 2 (2017): Jurnal Sains dan Teknologi Mitigasi Bencana
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jstmb.v12i2.2069

Abstract

Seiring dengan adanya perubahan status daerah krui menjadi ibukota Kabupaten Pesisir Barat, menjadikan daerah ini, khususnya Krui menjadi berkembang secara pesat, termasuk dengan proses pembangunannya. Tumbuh berkembangnya kota ini juga tidak terlepas dari indahnya pantai dan tempat lainnya yang dapat dijadikan tujuan wisata , termasuk wisatawan dari mancanegara. Mengingat daerah ini rawan terhadap bencana gempabumi, maka perlu adanya suatu informasi kegempaan kepada masyarakat supaya lebih memperhatikan faktor besar ancaman gempa dalam membangun / mendirikan bangunan. Terlebih lagi untuk bangunan yang tinggi yang biasanya didiami oleh banyak jiwa. Melalui penelusuran data kegempaan, survei geolistrik, pengumpulan data sondir dan sampel bor telah dilakukan analisis besar ancaman  gempa dan penetapan besar spektra percepatan gempanya, serta besar koefisien gempa yang nantinya dapat dipakai sebagai dasar perhitungan dalam melakukan desain bangunan yang relatif tahan terhadap ancaman gempabumi.
ANALYSIS OF CAUSES OF SUBSIDENCE IN THE AREA NEAR UJUNGNEGORO STATION, BATANG REGENCY Wisyanto Wisyanto
Jurnal Sains dan Teknologi Mitigasi Bencana Vol. 16 No. 1 (2021): Jurnal Sain dan Teknologi Mitigasi Bencana
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jstmb.v16i1.4885

Abstract

Changes in human activities from time to time increase rapidly. This activity requires the support of a reliable transportation network. Railroad land transportation is the main choice to overcome the impasse of human mobility and distribution of goods. It is known that this type of transportation does not intersect with other means of transportation so that it is free from congestion. For the sake of smoothness and safety in the use of trains, proper maintenance of the rail network is needed. Land subsidence supporting the railroad tracks is a common event that disrupts the functioning of the railroad and is part of maintenance. One of the subsidence that often occurs on the railroad tracks is a subsidence on the railroad tracks around Ujungnegoro Station. To find out the cause, an analysis of geoelectric data, groundwater basin conditions and local topography has been carried out on it. The results of the analysis that have been carried out conclude that the clay content factor and the concentration of water flow are the main factors causing subsidence.
ANALYSIS OF LANDSLIDES AND THE FORMATION OF WAY ELA NATUAL DAM, NEGERI LIMA, LEIHITU, CENTRAL MALUKU Wisyanto Wisyanto; Heru Sri Naryanto
Jurnal Sains dan Teknologi Mitigasi Bencana Vol. 16 No. 2 (2022): Jurnal Sains dan Teknologi Mitigasi Bencana
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jstmb.v16i2.5391

Abstract

The region of Indonesia is occupied by many volcanoes, both active and inactive. Volcanic products usually form a steep morphology and are often composed of volcanic deposits that are not yet compact or relatively loose. Such natural phenomena are very prone to landslides, and some of them forms natural dams that potential to be a source of flash floods. To find out the cause of the landslide, involving a big volume of landslide material and the formation of a natural dam, a study was conducted on the Way Ela Natural Dam. The research, in addition to using secondary data, also carried out field observations. The results showed that the landslide at Bukit Uluh Hatu involved a very large volume, due to the rock structure that was strongly fractured, the slope was very steep, the influence of the earthquake that enlarged opened layers and the high rainfall reached 360 mm. Meanwhile, the formation of natural dams is not only due to the large volume of landslides, but also due to the narrowing of the valleys which causes bottle necking of the flow of water and landslide material.
ANALYSIS OF LANDING STATION LOCATION DETERMINATION FOR MARINE CABLE-BASED TSUNAMI EARLY WARNING SYSTEM IN CILACAP, CANTRAL JAVA Heru Sri Naryanto; Wisyanto Wisyanto
Jurnal Sains dan Teknologi Mitigasi Bencana Vol. 16 No. 2 (2022): Jurnal Sains dan Teknologi Mitigasi Bencana
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jstmb.v16i2.5392

Abstract

Cilacap is located on the southern coast of Central Java, facing the confluence of the Indo-Australian Plate and the Eurasian Plate as well as the Megathrust south of Java, so it has a high chance of an earthquake and tsunami disaster. With the issuance of Presidential Regulation (Perpres) No. 93 of 2019 concerning Strengthening and Development of Earthquake Information Systems and Tsunami Early Warning, mandates the implementation of deep sea level tsunamis (buoys) and Cable-Based Tsunameters (CBT). The development of a tsunami early detection system using InaCBT submarine cable technology is the development of the Advanced Cable Based Tsunameter (AdvCBT). For the implementation of the AdvCBT development activities, a submarine cable route is planned from Krui, Pelabuhan Ratu and Cilacap. The location of the landing station (LS) in the form of a power house (PH), communication tower and beach manhole (BMH) must be determined prior to the construction of the AdvCBT infrastructure. Cilacap is one of the places that will be the location of the landing station of the AdvCBT. Scoring is carried out to obtain the best alternative location by considering: land availability, safe elevation against tsunamis, cable routes that do not cut rivers or roads, GSM signal conditions, electricity availability, soil stability, distance from the beach, social conditions of the community, environmental conditions, and safe from other obstacles. Analysis of eleven alternative landing station locations based on the scoring, the results show that the highest score for the alternative location is ALT-09, and ALT-08, both locations are located in Karangbenda, Kec. Adipala, Cilacap Regency, Central Java. Of the eleven (11) alternative landing station locations as a result of the desktop study, it was found that the highest scores for the alternative landing station locations were ALT-09 and ALT-08, both of which were located in Karangbenda, Kec. Adipala, Cilacap Regency, Central Java.